Join Andy Lister and Michael McQuaid for an introduction to the design basics behind Geosynthetics and MSE Walls!
The presenters will begin by introducing different geosynthetics and their uses, followed by focusing on geogrid properties and what you need to know when selecting and specifying different geogrids. You will then learn about how mechanically stabilized earth (MSE) retaining walls work. This will include general design requirements, through the review of potential failure modes. The presenters will finish by discussing different MSE retaining wall facing options while highlighting successful past projects.
This presentation is all about consolidation of soil and it's importance in Civil Engineering, co-efficients of consolidation, methods of determining co-efficient of consolidation, Terzaghi's Spring Analogy, Terzaghi's Theory
This presentation is all about consolidation of soil and it's importance in Civil Engineering, co-efficients of consolidation, methods of determining co-efficient of consolidation, Terzaghi's Spring Analogy, Terzaghi's Theory
Introduction
Geostatic Stresses
Boussinesq’s Equation
Vertical Stresses Under A Circular Area
Vertical Stresses Under A Rectangular Area
Equation Point Load Method
Newmark’s Influence Chart
Class notes of Geotechnical Engineering course I used to teach at UET Lahore. Feel free to download the slide show.
Anyone looking to modify these files and use them for their own teaching purposes can contact me directly to get hold of editable version.
Class notes of Geotechnical Engineering course I used to teach at UET Lahore. Feel free to download the slide show.
Anyone looking to modify these files and use them for their own teaching purposes can contact me directly to get hold of editable version.
oin Heba Ahmed and Drew Willms for Soil Steel Structures & End Treatments – Design Basics. The presenters will begin with an overview of the benefits of buried plate structures and will then go over design basics, coating options, shapes and custom fittings. They will finish up with reviewing the necessity of, and best practices in, end-treatment selection.
Various soil steel structures will be highlighted including Bridge-Plate, Multi-Plate, Bin-Wall and Sheeting as well as different wall materials used as end treatments.
Who Should Attend
Bridge / Structural Engineers
Road & Transportation Engineers
Road Superintendents
Provincial Departments of Transport
Earthworks & Highways Contractors
Mining Contractors
Mining Engineers
Municipal Engineers
Forestry Contractors
What You'll Learn
Benefits and applications of buried plate structures
Design considerations
Choosing the right coating for the project application
End treatment options and selection criteria
Review of case studies and applications across Canada
Introduction
Geostatic Stresses
Boussinesq’s Equation
Vertical Stresses Under A Circular Area
Vertical Stresses Under A Rectangular Area
Equation Point Load Method
Newmark’s Influence Chart
Class notes of Geotechnical Engineering course I used to teach at UET Lahore. Feel free to download the slide show.
Anyone looking to modify these files and use them for their own teaching purposes can contact me directly to get hold of editable version.
Class notes of Geotechnical Engineering course I used to teach at UET Lahore. Feel free to download the slide show.
Anyone looking to modify these files and use them for their own teaching purposes can contact me directly to get hold of editable version.
oin Heba Ahmed and Drew Willms for Soil Steel Structures & End Treatments – Design Basics. The presenters will begin with an overview of the benefits of buried plate structures and will then go over design basics, coating options, shapes and custom fittings. They will finish up with reviewing the necessity of, and best practices in, end-treatment selection.
Various soil steel structures will be highlighted including Bridge-Plate, Multi-Plate, Bin-Wall and Sheeting as well as different wall materials used as end treatments.
Who Should Attend
Bridge / Structural Engineers
Road & Transportation Engineers
Road Superintendents
Provincial Departments of Transport
Earthworks & Highways Contractors
Mining Contractors
Mining Engineers
Municipal Engineers
Forestry Contractors
What You'll Learn
Benefits and applications of buried plate structures
Design considerations
Choosing the right coating for the project application
End treatment options and selection criteria
Review of case studies and applications across Canada
Doug Leitch, P.Eng & Glenn Smith, CET provide an introduction to the use of soil-steel structures for haul road grade separations, mine portals, reclaim stacker tunnels, manway escape tunnels and underground raise bore.
Discussion centres on design considerations and common practices, and will present project case studies from some of the world’s largest miners.
Discussion Topics:
- Mine Haul Road Bridges – Important Considerations for Today's Mining Trucks
- Reclaim and Stockpile Tunnel Design – Cost Saving Strategies
- Important Considerations in the Selection of a Portal
- Retaining Wall Systems for Underground Applications
What You’ll Learn:
- Design parameters to consider for heavy mining equipment
The effect of seismic activity in design
- Life expectancy and the importance of life cycle costing in mining projects
- On-site installation procedures for various solutions
Intended Audience:
- Mining Engineers
- Consulting Structural Engineers
- Geotechnical Engineers
- Mining Contractors
- Mine Managers
Speaker: Doug Leitch, P. Eng
Position: Manager International Sales
Company: Armtec Drainage Solutions
Doug has extensive experience in the civil and mining engineering field. In his 25+ years with Armtec he has been involved in the design, and specification of an array of drainage and structural projects and has managed some of Armtec’s largest mining projects in almost twenty countries on six different continents.
Doug has been involved in international business for 10 years, is a member of Professional Engineers of Ontario and holds a Bachelor of Science in Engineering from the University of Guelph, Guelph, Ontario.
Speaker: Glenn Smith, CET
Position: Sales Supervisor, Atlantic
Company: Armtec Drainage Solutions
Glenn has worked for Armtec for over 15 years and has been involved with the specification of Armtec’s engineered products throughout Atlantic Canada. He has supervised the installation of numerous large scale Multi-Plate, Bridge-Plate and Bin-Wall projects throughout the region.
Glenn is a certified engineering technologist and a member of the Association of Engineering Technicians and Technologists of Newfoundland and Labrador.
Doug Leitch and Dominic Turner for ‘Armtec Engineering’s Top Picks! – Case Studies & Design Review!’ the exciting conclusion to our 2016 webinar program! This will be an in depth look at the design and installation challenges and solutions of major drainage projects.
The projects discussed will feature both Engineered Steel and Surface Trench drainage products and will review the design theory behind the designs as well as the selection criteria and final installation challenges and procedures. Hosted by Professional Engineers, join us to learn why the owners and consultants of the featured projects used the solutions they did!
Join Phil Taylor of Hydro International, for an informative introduction to their stormwater treatment solutions offered through Armtec! The presentation will introduce a range of treatment products, how they work, their application and regulatory status. There will be a particular focus on Oil Grit Separators (OGS), detailing sizing and installation configuration options, and maintenance.
What You'll Learn
Stormwater treatment products and their application
Pollutants that are best addressed by each treatment system
Influence of sizing methods on separators
A greater understanding of the OGS (Oil Grit Separator) industry
Some stuff you did not know, you did not know…
Keep it Running! – Surface Drainage 201 – Design Basics for Modular Trench Dr...Communications Branding
Join Dominic Turner and Jamie Kershaw for Surface Drainage 201, the interesting conclusion to our 2 part series on Surface Drainage!
The presenters will begin by reviewing key features of modular trench drains and then get into the fascinating step-by-step process for selecting the right modular trench drain system for a project. Key considerations they will cover include system durability and site conditions. You will also learn how to determine the load category for a specific application. The presenters will finish by reviewing the basics of hydraulic calculations for trench drain sizing.
Join Jim McKay & Slavek Piotrowski for an introduction to ARCIS – the world’s first ultra-thin, lightweight prestressed architectural precast panel.
The presenters will begin by reviewing current architectural precast concrete solutions, then introduce the ARCIS product line and its unique attributes. A brief overview of how the technology works to produce a strong but thin and light panel and a complete overview of architectural applications for ARCIS will follow.
The session will conclude with installation procedures, design considerations and other uses for the Arcis technology.
ARCIS has been used in the full spectrum of projects from residential high-rise, low-rise, retail storefronts, hospitals, malls, universities, public buildings, stadiums and marinas.
Applications include:
- Architectural facades & rain screens
- Ventilated facades & sunscreens
- Décor, accent walls and interior accents
- Louvers and fins
- Decking
- Stair Treads
DMRC Summer internship report for civil engineering students.
Project- DMRC phase 3 (CC-34 & CC-32) Design and construction of tunnel and underground metro station
Join Doug Lowry, P.Eng. and Drew Willms for a presentation will focused on how engineered solutions can assist in overcoming challenging project constraints. The presenters will discuss a variety of case studies in which economical and innovative solutions were used to eliminate unique project constraints-whether financial, physical, or time-dependent in nature.
Case study examples will include difficult bridge & stream crossings, culvert rehabilitations and stormwater detention systems.
What you will learn:
-How engineered products can be used to address difficult project constraints
-Selection criteria for various steel coatings
Who should attend:
-Transportation Engineers
-Road Superintendents
-Provincial Departments of Transport
-Bridge / Structural Engineers
-Earthworks & Highways Contractors
-Mining Contractors
-Mining Engineers
-Municipal Engineers
Bridge-Plate & Multi-Plate Applications and Case Studies (Ron Prychitko, P.Eng.)Communications Branding
Ron Prychitko, P.Eng. & Randy McDonald, P.Eng. will provide a complete overview of Bridge-Plate and Multi-Plate applications in Canada. Please join them for a review of engineering, construction, and performance considerations in various applications. This webinar includes case examples for bridges, culverts, stream enclosures, mine portals, road and rail grade separations, pedestrian tunnels and more.
Urbanization and Extreme Weather Effects: How Stormwater Detention, Retention...Communications Branding
Extensive urbanization and extreme weather conditions such as heavy rains and floods have increased the frequency, magnitude, volume and pollution of storm runoff.
Join Tony Tekly and Ramtin Zojaji as they describe how detention, retention, infiltration and treatment solutions can minimize the effects of storm runoff, using a variety of materials. The webinar will also review layouts and accessories as well as an extensive list of case studies showing examples of installations across Canada.
What You'll Learn
-The growing need for Stormwater systems
- Difference between Detention, Retention and Infiltration
- Advantages of the different solutions
- On-site installation procedure overview
- Overview of available Stormwater treatment and management systems
- Details and benefits of the Vortechs and Vortsentry treatment systems
- Review of case studies and applications across Canada
Glass-reinforced plastic (GRP) (also called fibre reinforced plastic or fibre-reinforced polymer) is a composite material made of a polymer matrix reinforced with fibres. The fibres are usually glass (in fibreglass), carbon (in carbon-fiber-reinforced polymer), aramid, or basalt. The polymer is usually an epoxy, vinylester, or polyester thermosetting plastic and phenol formaldehyde.
GRPs are commonly used in the aerospace, automotive, marine and construction industries. They are commonly found in ballistic armor as well.
GRP scores over traditional material like steel, concrete, wood and aluminium in multiple ways.
Corrosion free | light weight | extremely strong | UV resistant | no maintenance | faster installation | longer service life
Presentation on Textiles & GeoTextile Composites done by Saurabh Vyas at ATIRA during One day workshop on GEO Presentation done by Sh Saurabh Vyas during the workshop on GEOTEXTILES IN CIVIL ENGINEERING organized by #IEIGSC in association of iNDEXTb, L D College of Engineering, Ahmedabad & ATIRA
First-of-its-kind in the world Composite (GRP) Railway platforms, stairways, claddings and retention solutions.
Composite (GRP) Railway Stations and Solutions score over traditional materials in many ways:
Longer service life since they are heavy duty.
Faster project completion, as they are lightweight and easy to install.
Minimal passenger disruption and inconvenience due to faster installation.
Negligible to minimal maintenance required, as they don’t chip, break or crack easily.
Highest passenger safety as they have high slip resistance, non-conductive, etc.
Excellent for coastal areas as they are non-corrosive.
Resistances to wide range of chemicals, UV resistant and retain colour and look over the long term.
The product has been described as “game changing” by industry insiders and has won multiple awards.
what is polymer concrete, types, properties, material used in manufacturing process , manufacturing process, applications and their advantages. case study on polymer composite concrete.
Linear Surface Drainage 101: Trench Drain Applications
Learn about the benefits of linear surface drainage over traditional point drainage, and then dive in to discuss modular trench drain features, system configurations and design options.
Highlights of a variety of applications where modular trench drain systems can be used and provide practical examples through a selection of case studies.
Surface Drainage 101 is the first of an exciting 2-part series reviewing linear drainage solutions. Surface Drainage 201 will also be presented on March 18, 2016 so stay tuned for updates!
Presenters:
Dominic Turner, Ing.
National Sales Engineer – HAURATON Products, Armtec Drainage Solutions
Jamie Kershaw, B.Sc. (Hons), MIEx
International Key Account Manager, HAURATON GmbH
Let it Flow! Culvert Design 101 – Basic Hydraulics, Culvert Location & End Tr...Communications Branding
Patrick Biro and Roger Goobie for Culvert Design 101, an overview of culvert solutions! The presenters will begin by reviewing basic culvert hydraulics and will then discuss considerations in the selection of culvert locations. They will finish up with reviewing the necessity of, and best practices in, end-treatment selection. Various culvert products will be highlighted including Hel-Cor, BOSS 2000, and Multi-Plate.
Culvert Design 101 is the first of a 2-part series reviewing culvert design and solutions.
What You'll Learn
Culvert types & applications
Basic hydraulics
Best practices in culvert design and location
Appropriate end treatments for culverts
Review of case studies and applications across Canada
Randy McDonald, Armtec Drainage’s Director of Engineering and Frank Klita, Senior Sales Representative, for the exciting second part of our 2-part Culvert series – Culvert Design 201! This presentation will build on the basics of culvert design covered in Culvert Design 101 and will focus in- depth on the structural design of culverts. Additionally, the presenters will review considerations and best practices for culvert installations.
What You'll Learn
Culvert types & applications
Structural design of culverts and buried structures as per CHBDC (Canadian Highway Bridge Design Code) methods
Installation best practices
Review of applications across Canada
Join Ron Prychitko & Lorne Mielty for an overview of various Bridge-Plate, Multi-Plate and Tunnel Liner Plate applications. Through the presentation of various case studies they will cover product selection criteria for corrugated steel plate structures and best practices including assembly and installation.
Case study examples will include bridges, culverts, wildlife passes, mine portals, pedestrian tunnels and more.
What You’ll Learn:
-Learn about unique applications that solve demanding -problems
-Advantages of soil/steel structures
-Construction process for structures
-Available product, application and design resources
-General Canadian Codes and Standards will be referenced
Who Should Attend
-Bridge / Structural Engineers
-Municipal & Transportation Engineers
-Municipal, Provincial and Federal Infrastructure personnel
-Developers
-Earthworks & Highways Contractors
-Mining Engineers & Contractors
-Road Superintendents
Join Dominic Turner, Ing. / Eng. and Cody Neath offer a presentation on storm sewer and culvert solutions, including best practices and product selection criteria for corrugated steel and HDPE pipe. Additionally, the presenters will provide a technical review of flexible pipes. Various application cases and project profiles will be covered highlighting a range of sewer and culvert pipe products including Hel-Cor, UltraFlo, BOSS 1000 and 2000, and DuroMaxx pipes.
Several case examples from across Canada, United States as well as global mine site projects.
What You’ll Learn:
- Comparison between flexible and rigid pipes
- Characteristics of steel and HDPE pipes
- Overview of the manufacturing process
- Review of case studies and applications in Canada
- On-site installation procedure overview
Who Should Attend:
- Transportation Engineers
- Road Superintendents
- Provincial Departments of Transport
- Bridge / Structural Engineers
- Earthworks & Highways Contractors
- Mining Contractors
- Mining Engineers
- Municipal Engineers
Doug Lowry, P.Eng & Ron Prychitko, P.Eng give an overview of various Retaining Wall and Engineered Slope Systems. Discussion will focus on applications and best practices for a variety of wall and slope systems including Durisol Narrow Footprint walls, Bin-Wall, MSE (Precast Face, Lock + Load, Wire Mesh Walls & Slopes), Gabions and Temporary Walls. The presenters will include several case studies and highlight specific earth retention solutions for a variety of criteria including aesthetics.
What You’ll Learn:
- Points to consider when selecting a wall system
- Review of several case studies & applications in Canada
- On-site installation procedure overview for various solutions
Intended Audience:
- Transportation Engineers
- Road Superintendents
- Provincial Departments of Transport
- Bridge / Structural Engineers
- Earthworks & Highways Contractors
- Landscape Architects
Event Overview
Shane Sherar, will provide a complete overview of Industrial and Retail insulated wall panel applications in Canada. Topics will include, precast production, aesthetic flexibility, design details, installation and best practices.
Who Should Attend:
- Architects
- Developers
- Consulting Engineers
- General Contractors
Product Features
- Custom designed for each building project
- Functional, economical
- Rapid installation, regardless of weather conditions
- Modular panelization can be tailored to accommodate windows, man-doors and loading dock openings
- Full-width rigid insulation can be adjusted in thickness and density to meet specific thermal R-value requirements
- Durable concrete interior and exterior finish
- Load bearing vs non-load bearing
Typical Applications
- Big Box Retail
- Industrial/Warehouse
Product Advantages:
- Complete wall system
- Durable
- Fast all weather construction
- Economical
- Aesthetic flexibility
- Impact, vandal, insulation & more...
What You’ll Learn
- When to consider Insulated Precast wall panels
- What are my design options and limitations
- Best practices
Includes Cases and Project Discussions from Across Canada.
Mike Edwards will give a complete overview of transportation and environmental noise attenuation solutions, products and systems for highway, rail, intermodal, industrial and residential applications. We will also cover a detailed discussion of considerations for engineers, architects and specifiers.
Patrick Biro, P. Eng. & Dave Groot will provide a complete overview of common tunnel liner and tunnel rehabilitation solutions in Canada. The presentation will include various trenchless solutions for tunneling and relining, including structural plate, corrugated steel & plastic pipe, steel-reinforced polyethylene pipe and spiral wound liners.
Bridge-Plate & Multi-Plate Applications and Case Studies (Randy McDonald, P.E...Communications Branding
Ron Prychitko, P.Eng. & Randy McDonald, P.Eng. will provide a complete overview of Bridge-Plate and Multi-Plate applications in Canada. Please join them for a review of engineering, construction, and performance considerations in various applications. This webinar includes case examples for bridges, culverts, stream enclosures, mine portals, road and rail grade separations, pedestrian tunnels and more.
Hollowcore has been around for over 40 years. Learn the basics of Hollowcore as well as some new ideas adapting to environmental needs (LEED) and energy efficiency from this tutorial.
Hollowcore attributes include versatility, creation of long spans and open spaces, fast track construction, control of flexural cracking, zero tension possible in bottom flange, minimal site labour, and low long-term maintenance costs or, in short, VOS-C.
This informative tutorial by industry leading Armtec will provide an introduction to Stormwater treatment and the large number of regulations present in Canada. The tutorial will present a range of products to meet various Stormwater treatment regulations and will provide guidance on proper selection and sizing of the products, which is a key question in the development of many projects. Learn how to achieve greener projects through effective particle removal, water retention and infiltration. Stormwater detention will be addressed during the tutorial.
A range of products and application cases will be covered including the VortSentry, Vortechs and StormFilter units and ChamberMaxx stormwater detention/infiltration products.
Armtec Ltd. specializes in the construction of precast concrete steps and precast concrete decks. This tutorial gives insight into the process from start to finish, explaining the intricate stages in deciding on the perfect precast steps and decks for you. Concrete steps are a fast, durable and cost-effective way of providing access to residences, apartments and condominiums.
Sound Barrier Walls: Design, Usage and Specifications Part 2 - Armtec Ltd. Communications Branding
Part 2 of an informative tutorial by Armtec Ltd. explaining the details behind the construction and design of their sound barrier walls. The tutorial covers the various types of noise barriers and the different designs available for specific applications.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
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MSE Walls & Geosynthetics - Design Basics Webinar April 2016
1. Randy McDonald,
P.Eng.
Director of Engineering
Armtec
Drainage Solutions
Frank Klita
Sales Representative
Armtec
Drainage Solutions
Michael McQuaid P.Eng.
Design Engineer
Armtec
Drainage Solutions
Andrew Lister
Sales Manager
Mirafi® Geosynthetics,
TenCate Geotube®
FRIDAY APRIL 22, 2016 / 9AM PST / 11AM CST / 12PM EST
TECHNICAL WEBINAR
MSE WALLS AND GEOSYNTHETICS
DESIGN BASICS
2. YOUR HOST
Janine Yetke
Director of Marketing
Armtec, Drainage Solutions
LinkedIn: ca.linkedin.com/in/janineyetke/en
Email: Janine.Yetke@armtec.com
3. CPD CREDIT CERTIFICATES
• Qualifies in Most Jurisdictions in Canada & USA for 1 Hour Technical
Informal
• Formal completion certificates are emailed within two weeks of attending
• Check your local guidelines if unsure of your requirements
Email your complete attendee list should there be multiple individuals
viewing the same screen:
• Full Name
• Title
• Email
webinars@armtec.com
Armtec will send certificate to all participants
4. Armtec is one of Canada’s
largest infrastructure
company supplying precast,
corrugated steel and HDPE
products and solutions. Every
day, our proven products,
engineered solutions and
dedicated people are counted
on to support construction and
infrastructure projects in
communities everywhere. With
a national presence and a
local focus on exceptional
customer service, we are
dedicated to building
excellence.
Actual 2016
Locations 40
Drainage Locations
Precast Locations
ABOUT ARMTEC
5. SECTORS
Armtec specializes in all infrastructure markets and segments and can help with any project to ensure you
have the right products for the job. Our people have extensive experience and access to resources all across
the country, and can help with all facets of product selection, installation and support.
Stormwater Solutions
Mining & Energy
Commercial & Retail
Constructions
Transportation Underground & Utility
Infrastructure
Sports & Entertainment
Institutional Construction Industrial Construction Agriculture
Commercial & Residential
Landscaping
Forestry Residential & Hospitality
ABOUT ARMTEC
6. Armtec Drainage Solutions’ centralized engineering
department consists of design engineers, a drafting team,
and estimators.
Additionally, professionally licensed Region engineers are
located in all Market Areas across the country.
DRAINAGE ENGINEERING SUPPORT & ROLES
ABOUT ARMTEC
7. YOUR SPEAKERS
Michael McQuaid P.Eng.
Design Engineer
Armtec, Drainage Solutions
Michael.McQuaid@armtec.com
Andrew Lister
Sales Manager
Mirafi® Geosynthetics, TenCate Geotube®
8. AGENDA
1. Review of Geosynthetics
2. Types of Geosynthetics
3. Geogrids
4. MSE Wall Components
5. Analysis of MSE Walls
6. MSE Wall Types & Facing Options
9. REVIEW OF GEOSYNTHETICS
Geosynthetics:
Generic term for all synthetic materials used in geotechnical
engineering applications, including
• Textiles
• Grids
• Nets
• Membranes
• Composites
10. POLYMERS USED IN GEOSYNTHETICS
Polypropylene (PP)
Tough, flexible synthetic thermoplastic material made by polymerizing propylene
• Similar to polyethylenes, but harder and tougher
• Provides good tensile strength relative to its weight
• Translucent in its natural state, PP requires additives to create UV stability.
• Specific gravity of 0.96 (Floats); Durable, inert
• Majority of Nonwovens and Wovens manufactured from PP
11. POLYMERS USED IN GEOSYNTHETICS
Polyester (PET)
Long-chain polymers chemically composed of at least 85% by weight of an ester
and a dihydric alcohol and a terephthalic acid
• Fabrics and fibers are extremely strong – high tensile at low strains
• Very durable: resistant to most chemicals, stretching and shrinking, and
abrasion resistant
• Hydrophobic (repels water) in nature and quick drying
• Polyester used to create high strength to weight products e.g., grids
12. GEOSYNTHETICS
• Nonwoven - Textile structure produced by mechanical, chemical,
thermal, or solvent bonding and/or interlocking of fibers
• Woven - Textile structure produced by interlacing two or more
yarns, fibers, or filaments
• Knit - Textile structure produced by inter-looping ends of yarn
• Geogrid - A grid like polymeric material formed by intersecting ribs
joined at the junctions used for reinforcement
15. GEOTEXTILES
• Any permeable textile used in any
geotechnical engineered system
• Also referred to as
• Filter Fabric
• Filter Cloth
• Filter Paper
• Construction Paper
16. NON WOVENS
• Advantages
• High Flow Rate
• Fine Filtration
• High Elongation
• Flexible
• Can Provide Cushion/Protection
• Disadvantages
• Low Strength to Weight Ratio
17. WOVENS
• Advantages
– High Strength to Weight Ratio
– Controlled Filtration
– Controlled Flow Rate
– Durable
– Low Elongation with High
Tensile Strength
– Installation Resistant
• Disadvantages
– Can have poor Flow and Filtration
23. TYPICAL CHARACTERISTICS OF PET
GEOGRIDS
• High strength uniaxial polyester
geogrid
• Strongest geogrid reinforcement
available
• Woven and coated with a PVC coating
• Vast LTDS tensile strength range
• 18.5kN/m – 253kN/m
• Excellent durability properties
• 3.6 meter (12 feet) wide rolls
• 1.8 meter (6 feet) wide rolls
• 1.2 meter (4 feet)wide rolls
24. PET GEOGRIDS
• Flexible and Tough
• Delivers immediate soil geogrid stress transfer
• High Long Term Design Strengths
• Long term design strengths are backed up by more than 100,000
hours of creep testing performed at an outside, independent test
laboratory
• Easy Handling
• No sharp edges which may injure workers
• No Recoiling
• Remains in place after being installed; does not recoil
• Cost Effective
• Creep resistant polyester fibers provide a higher allowable tensile
strength, minimizing the required number of geogrid layers
25. GEOGRIDS – WHY POLYESTER (PET)
HDPE
reinforcement
Polyester
reinforcement
100 kN/m
75 kN/m
25 kN/m
Same Ultimate tensile strength
Long term design strength
Strain %
Log time (s)
21 3 4 5 6 7
10
20
30
1hr 1 d 1yr
Polyethylene
Polyamide
Polyester
Polypropylene
Creep at 60% load
Polyester is the strongest design polymer
Analysis of Different High Strength Geosynthetics
27. SPECIFYING GEOGRIDS
Mobilization of high tensile
strength at low strain.
Wide Range of LTDS (12kNm-
180kNm)
Good interlocking and high interface friction.
Stable open grid matrix interlocks and
Interacts with soil to provide high shearing resistance.
The rough surface of grid provides further frictional and
shear resistance compared to smooth polyethylene
geogrid which relies mainly on interlocking mechanism.
High Strength Polyester Geogrid – Benefits
High resistance to
construction stress.
Protective polymer
coating for enhanced
chemical and
mechanical stress
resistance.
Crusher run
Geogrid
Interlocking mechanism
Tension
Load
Interface friction
0
20
40
60
80
100
0 2 4 6 8 10 12 14
Strain (%)
Percentageofcharacteristicshort-term
tensilestrength(%)
28. SPECIFYING GEOGRIDS
The Geogrid Manufacturer Should
• Have a full complement of geosynthetic
testing equipment
• Be Active in developing and maintaining
ASTM standards
• Have a GRI-LAP Accredited Laboratory
• Be A2LA Accredited
• Be ISO 9002 Certified
29. SPECIFYING GEOGRIDS
“Rumor vs. Fact”’
• Rumor: Polyester geogrids may not be used in
recycled concrete soil backfills and high pH soils.
• Fact: Geosynthetics have been tested and installed
in all soil types. PET geogrids are suitable for all soil
types based on proper design. See FHWA Elias
technical paper “The effect of pH……of Polyester
Geosynthetics”
30. SPECIFYING GEOGRIDS
Chemical Resistance
• PVC coating process binds the molecules for a tighter,
stronger bond resulting in superior durability without
cracking or spitting
(FHWA Montana DOT Study)
• PVC is inherently inert to contaminated soils.
(Iowa State University …….impervious to gasoline)
•Service life beyond 120 years
Durability of PET
31. SPECIFYING GEOGRIDS
Geogrid Creep Testing
ASTM D5262
• High Creep Resistance
• Over 100,000 hours of creep
data
• RFCR PET = 1.47 NTPEP
(check with mfg.)
Design Life Exceeds 100 years
34. SPECIFYING GEOGRIDS
NTPEP Installation Damage
Testing
Did you know the testing method has
changed?
‘Old Test Method’
• 200mm fill lift
• Moderately-sized compaction
equipment (44 kN)
‘New Test Method’
• 150mm fill lift
• Large-sized compaction equipment
(111,000 kN)
35. SPECIFYING GEOGRIDS
NTPEP allows for easy comparison of
materials
– NTPEP Published Reports
Property Tensar Strata Mirafi
Creep (RFcr) 2.68 1.49 1.45
Installation Damage (RFID)
Type 3 Silty Sand
1.24 1.24 1.05
Durability (RFD) 1.1 1.15 1.15
Total RF 3.66 2.12 1.75
Reduction Factors for Type 3 Backfill (Silty Sand)
36. SPECIFYING GEOGRIDS
NTPEP allows for easy comparison of
materials
– NTPEP Published Reports
Property Tensar Strata Mirafi
Creep (RFcr) 2.68 1.49 1.45
Installation Damage (RFID)
Type 1 Coarse Gravel
2.57 1.88 1.61
Durability (RFD) 1.1 1.15 1.15
Total RF 7.58 3.22 2.68
Reduction Factors for Type 1 Backfill (Coarse Gravel)
If LTDS of 18.9 kN/m needed:
• Tensar – 143.8 kN/m
• Strata – 61.09 kN/m
• TenCate – 50.46 kN/m
37. SPECIFYING GEOGRIDS
“Rumor vs. Fact”
• Rumor: Need to Specify Ultimate Tensile Strength, 95%
of Tult strength, or Junction Strength along with LTDS.
• Fact: The design of MSE structures uses LTDS only.
There is no design need for specifying ultimate tensile
strength, 95% of Tult strength or Junction Strength.
38. SPECIFYING GEOGRIDS
• Industry accepted method to determine the long term usable
strength of a geogrid product
• Sample calculation, PET in Coarse Gravel
Wide Width Tensile Strength = 50.46 kN/m
RFID = 1.61 RFCR = 1.45
RFD = 1.15 (typical soil pH range)
LTDS = Wide Width Tensile Strength
RFID x RFCR x RFD
LTDS = 50.46 / (1.61 x 1.45 x 1.10) = 18.9 kN/m
Design Properties
39. SPECIFYING GEOGRIDS
Design Properties
• Industry accepted method to determine the long term usable
strength of a geogrid product
• Sample calculation, PE Geogrid in Coarse Gravel
Wide Width Tensile Strength = 143.8 kN/m
RFID = 2.57 RFCR = 2.68
RFD = 1.10 (typical soil pH range)
LTDS = Wide Width Tensile Strength
RFID x RFCR x RFD
LTDS = 143.8 / (2.57 x 2.68 x 1.10) = 18.9 kN/m
42. SPECIFYING GEOGRIDS
PET Geogrids
Know what you are getting
Made in NA
ISO 9002 Certified manufacturing
facility
On-site GAI-LAP accredited
geosynthetics lab
Up to date NTPEP evaluation and
report
44. SPECIFYING GEOGRIDS
PET Geogrids
Know what you are getting
Extensive connection data, including sustained load
connection testing.
Extensive Creep testing, including conventional >
10,000 hours.
Installation damage testing with multiple soil types.
PET yarns that exceed CEG and MW requirements.
45. SPECIFYING GEOGRIDS
As a designer, how do you
protect yourself?
– Thorough and enforceable
specifications
– Manufacturer QC Program
– On-site QA Program
46. SPECIFYING GEOGRIDS
1.6 SUBMITTALS
A. Submit the following:
1. Certification: The contractor shall provide to the
Engineer a certificate stating the name of the
manufacturer, product name, style number, chemical
composition of the filaments or yarns, manufacturing
location and other pertinent information to fully describe
the geosynthetic. The Certification shall state that the
furnished geosynthetic meets MARV requirements of the
specification as evaluated under the Manufacturer's
quality control program. The Certification shall be
attested to by a person having legal authority to bind the
Manufacturer.
49. SPECIFYING GEOGRIDS
A. Submit the following:
2. Quality Standards: The contractor shall
provide to the Engineer the manufacturer’s Quality
Control Plan along with their current A2LA, GAI-LAP,
and ISO 9001:2008 certificates.
51. SPECIFYING GEOGRIDS
1.7 QUALITY ASSURANCE
A. Manufacturer Qualifications:
The geogrid manufacturer shall have all of the following credentials:
Valid NTPEP REGEO report on geogrid material used for this project
Geosynthetic Accreditation Institute (GAI) - Laboratory Accreditation
Program (LAP)
American Association for Laboratory Accreditation (A2LA)
ISO 9001:2008 Quality Management System
B. The geotextile manufacturer shall have a GAI-LAP accredited
laboratory at the location of production capable of performing the ASTM
tests as outlined in the specification.
52. SPECIFYING GEOGRIDS
1.8 DELIVERY, STORAGE, AND HANDLING
A. Geosynthetic labeling, shipment, and storage
shall follow ASTM D4873. Product labels shall clearly
show the manufacturer or supplier name, style name,
and roll number. Product identifications labels, including
manufacturers name, product style and roll number shall
be included on the outside of the roll packaging material
and one the inside of the core of the roll. The material
must also be labeled so it is easily identified when
deployed.
54. SPECIFYING GEOGRIDS
2. Alternate Materials
A. Alternate geogrid may be considered if the
material meets all of the requirements outlined in this
specification. In addition to the submittal requirements
already outlined, the contractor shall provide the
manufacturers submittal that includes the name and
address of the original manufacturer, technical data
sheets of the products submitted, installation damage
reports from a 3rd party accredited laboratory, creep
testing data, including conventional data >10,000 hours,
connection testing of the geogrid and block combination
being submitted as an alternate.
55. SPECIFYING GEOGRIDS
• As the designer (Engineer of Record), how do
you handle requests for alternate materials?
• Geogrid
Alternate Materials
56. SPECIFYING GEOGRIDS
• There are some quick resources that can help
you review alternate geogrids.
• Website
Alternate Materials - Geogrid
58. SPECIFYING GEOGRIDS
• There are some quick resources that can help
you review alternate geogrids.
• Website
• Geosynthetics Specifier’s Guide
Alternate Materials - Geogrid
60. SPECIFYING GEOGRIDS
• There are some quick resources that can help
you review alternate geogrids.
• Website
• Geosynthetics Specifier’s Guide
• Who is the original geogrid
manufacturer?
• NTPEP
Alternate Materials - Geogrid
61. SPECIFYING GEOGRIDS
• There are some quick resources that can help
you review alternate geogrids.
• Website
• Geosynthetics Specifier’s Guide
• Who is the original geogrid manufacturer?
• NTPEP
• Request actual test data for creep, ID, and
pullout.
• If PET, request CEG and MW certs.
Alternate Materials - Geogrid
63. WHAT ARE MECHANICALLY STABILIZED
EARTH WALLS?
• Mechanically Stabilized Earth (MSE) walls are retaining walls or grade
separation devices
• MSE walls utilize a reinforced soil gravity mass to resist external forces
• Reinforced soil is created through the use of horizontal soil reinforcing
elements and compacted backfill material.
66. BACKFILL MATERIAL
• Gradation Requirements as per AASHTO LRFD Construction
Specification
Sieve Size Percent Passing (%)
100 mm (4.0 in.) 100
4.25 mm (No. 40) 0 – 60
75 μm (No. 200) 0 – 15
• Free draining, granular material typically recommended for soil
reinforcement backfill
• Minimum backfill compaction is typically 95% Standard Proctor
Maximum Dry Density (SPMDD)
67. LONG TERM DESIGN STRENGTH
𝐿𝑇𝐷𝑆 =
𝑇𝑢𝑙𝑡
𝑅𝐹𝐼𝐷 × 𝑅𝐹𝐶𝑅 × 𝑅𝐹 𝐷
Installation Reduction Factors, RFID
Geosynthetics
Type 1 Backfill Type 2 Backfill
Max. Size 4" (100mm) Max Size 3/4" (20mm)
D50 about 1-1/4" (30mm) D50 about #30 (0.7mm)
HDPE Uniaxial Geogrid 1.20 - 1.45 1.10 - 1.20
PP Biaxial 1.20 - 1.45 1.10 - 1.20
PVC coated PET Geogrid 1.30 - 1.85 1.10 - 1.30
Acrylic coated PET geogrid 1.30 - 2.05 1.20 - 1.40
Woven Geotextiles (PP & PET)a 1.40 - 2.20 1.10 - 1.40
Non Woven Geotextiles (PP &
PET)a 1.40 - 2.50 1.10 - 1.40
Slit Film Woven PP Geotextilea 1.60 - 3.00 1.10 - 2.00
a. Minimum Weight 8.0 oz/yd2 (270 g/m2)
Creep Reduction Factor, RFCR
Polymer Type Creep Reduction Factor
Polyester (PET) 2.5 - 1.6
Polypropylene (PP) 5.0 - 4.0
High Density Polyethylene (HDPE) 5.0 - 2.6
70. MSE WALL DESIGN METHODS
Design Methods most commonly used and are Industry Accepted Standard of
Practice are:
• National Concrete Masonry Association (NCMA)
• Used most frequently for Private Works
• Design Manual “Segmental Retaining Walls” is currently in its Second Edition, although it is
currently being revised.
• Federal Highway Administration (FHWA)
• Used most frequently for Public Works
• Design Manual “FHWA NHI-00-043, 044, Mechanically Stabilized Earth Walls and
Reinforced Steepened Slopes, Design and Construction Guidelines” is currently in its
Second Edition, first Edition was known as “Demo 82”
• Developed following AASHTO LRFD Bridge Design Specifications and AASHTO LRFD
Bridge Construction Specifications.
71. MSE WALL ANALYSIS
External Stability
Sliding Movement
Sliding Resistance
Sliding Resistance
Sliding Overturning
Overturning
Movement
80. MSE WALL CONSTRUCTION -
WRAPPED FACE
STEP 1
1. Check level of base
2. Check all line, grade and curves
3. Place removable form at front of reinforced mass
4. Install first layer of geotextile over removable form
Removable form
Geotextile Reinforcement
Native Soil
81. STEP 2
1. Pull Geotextile tight, keep tension applied
until backfill is placed.
Compacted fill
Native Soil
Depression for geotextile wrap
Removable form
2. Place backfill in specified lifts and compact
to 95% Standard Proctor Dry Density.
MSE WALL CONSTRUCTION
82. STEP 3
1. Wrap geotextile back over compacted fill
2. Place & compact fill above upper wrap portion and
level
Native Soil
Fill on top of geotextile
MSE WALL CONSTRUCTION
83. STEP 4
1. Place second removable form by repeating step 1.
(provide required batter with set back)
Native Soil
2. Place second layer of geotextile and reinforced
fill by repeating steps 2 through 3.
3. After completion of second lift, remove the first form.
MSE WALL CONSTRUCTION
84. MSE WALL CONSTRUCTION
1. Repeat steps 1 through 3 until wall is at required height
Native Soil
Finished Grade
88. MSE WALL SYSTEMS
Welded Wire Mesh
Face / Geogrid
Finished Grade
Reinforced
Soil Zone
FOUNDATION SOIL ZONE
Native Soil
Geosynthetic
Reinforcement
Welded Wire Fascia
99. Contact Your Local Sales Rep:
www.armtec.com/sales-offices/
Todays Speakers:
Michael McQuaid
Michael.McQuaid@armtec.com
Andrew Lister
Mirafi® Geosynthetics, TenCate Geotube®
100. UPCOMING WEBINARS
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www.armtec.com/events
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certificates, send names & emails
to webinars@armtec.com!
Fall Webinar Series Coming Soon!
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102. Contact Your Local Sales Rep:
www.armtec.com/sales-offices/
Todays Speakers:
Michael McQuaid
Michael.McQuaid@armtec.com
Andrew Lister
Mirafi® Geosynthetics, TenCate Geotube®
Editor's Notes
Also, as a final reminder, if any of you have been sitting in as a group, please make sure to send in all the names and emails of the attendees so you can get your CPD certificates