This document discusses recent developments in bored pile and diaphragm wall design and construction for marine structures. It covers topics such as diaphragm wall finish, cage detailing practice, tremie concreting practice, panel stability, and improvements in safety. The key points are that diaphragm walls are well-suited for marine works; plant and material advances present opportunities and risks; and newly published industry guidance aims to achieve better quality and safety outcomes.
Diaphragm wall: Construction and DesignUmer Farooq
Diaphragm walls are concrete or reinforced concrete walls constructed in slurry-supported, open trenches below existing ground.
Concrete is placed using the Tremie installation method or by installing pre-cast concrete panels (known as a pre-cast diaphragm wall). Diaphragm walls can be constructed to depths of 150 meters and to widths of 0.5 to 1.50 meters.
Diaphragm wall: Construction and DesignUmer Farooq
Diaphragm walls are concrete or reinforced concrete walls constructed in slurry-supported, open trenches below existing ground.
Concrete is placed using the Tremie installation method or by installing pre-cast concrete panels (known as a pre-cast diaphragm wall). Diaphragm walls can be constructed to depths of 150 meters and to widths of 0.5 to 1.50 meters.
Sheet Piles; Advantages, Types and Methods - Sheet piles are commonly used for retaining walls, land reclamation, underground structures such as car parks and basements, in marine locations for riverbank protection, seawalls, cofferdams, and so on
For good condition of pavement, an engineer should have to silent knowledge about failures and causes of pavement to minimize the road accident and for better life of road highway.
Cracks on concrete.
How to catergorized cracks on newly poured concrete
Thermal cracks
Mass concrete
Fresh concrete
Cracks on concrete have many causes. They may affect appearance only, or it may indicate significant structural distress
Sheet Piles; Advantages, Types and Methods - Sheet piles are commonly used for retaining walls, land reclamation, underground structures such as car parks and basements, in marine locations for riverbank protection, seawalls, cofferdams, and so on
For good condition of pavement, an engineer should have to silent knowledge about failures and causes of pavement to minimize the road accident and for better life of road highway.
Cracks on concrete.
How to catergorized cracks on newly poured concrete
Thermal cracks
Mass concrete
Fresh concrete
Cracks on concrete have many causes. They may affect appearance only, or it may indicate significant structural distress
Soil nailing is a technique used to reinforce and strengthen existing ground.Soil nailing consists of installing closely spaced bars into a slope or excavation as construction proceeds from top down.It is an effective and economical method of constructing retaining wall for excavation support, support of hill cuts, bridge abutments and high ways.This process is effective in cohesive soil, broken rock, shale or fixed face conditions.
FERROCRETE - MATERIAL AND CONSTRUCTION METHODSjagrutib22
Ferrocrete - introduction, ferrocement, history, difference between rcc and ferrocrete, applications, advantages and disadvantages, construction methods, use of ferrocrete technology and other information.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
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.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
8. Why concrete at London Gateway ?
• Illustrative design based on combi
wall
• Safer installation of DWall on dry land
• Risk of driving into very dense Thanet
Sand mitigated
• Dwalls will act as foundations for the
gantry cranes
• Steel prices high and volatile in 2007
• Much reduced steel content in DWall
9. Design of Diaphragm Wall
• Key challenges
• Relatively high retained height (ca.
28m lowest dredge)
• Changing ground conditions
• Complex soil-structure interaction
• Tight displacement criteria - limit
permanent change of gauge ca. 14.75
mm
• Complex load cases involving tidal lag,
crane, vessel berthing and mooring
• Crack widths limited to 0.24 mm (SLS)
in the splash zone
10. Thanet Sand Section
Soil Model One
London Clay Section
Soil Model Three
W E
Transition
Soil Model Two
12. Recent developments - deeper CFA
Soil Mech SF50 Fundex F3500
CFA pile reach limited by mast
height and pull back winch capacity
• Dia. 300 to 1500mm
• Length max 32 metres
16. Diaphragm walls – new horizons
100m+ wall depth
1800mm thickness
Verticality 1 in 300
C60 concrete
17. Rotary drum cutters
Mud Pump
Inclinometer
Guide Frame
Mud to the
desanding
plant
Mud return into the trench
after treatment
Diaphragm wall - Hydrofraise
19. Adjust alignment
as excavation
proceeds
Diaphragm wall – Grab versus Hydrofraise comparison
Theoretical position
of wall
Re-excavate to
correct
alignment
Grab Hydrofraise
Specified limits of
deviation
22. Diaphragm wall – What can a finished Dwall look like ?
Bleed channels Mud inclusion Mattressing
23. Diaphragm wall – Latest design and execution practice?
• Careful mix design
• Pre-start concrete trials
• Monitor concrete
production facility
• Observe good cage
detailing practice
• Follow good tremie
practice
• Slump and strength are
not sufficient testing eg.
bleed and stability tests
25. Diaphragm wall – Latest guidance on cage detailing
• Final clear horizontal distance on vertical
bars at least 100 mm
• Can be reduced at laps to 80 mm
• Multiple layers of vertical bars to be lined
up behind eachother
• Final clear vertical distance on horizontal
bars at least 150 mm provided max
aggregate is 20 mm
• 3D model may be required in areas of high
congestion to avoid clashes
• Minimum distance between cages 200 mm
• Ensure nominal cover is sufficient to
achieve required design cover, to satisfy
durability requirements, allowing for
construction tolerances
27. Diaphragm wall – Latest guidance on tremie practice
• At start of pour tremie to the panel bottom and raise <200 mm
• Prior to first discharge install effective separator ie. ball or vermiculite volume
to create plug length at least 2x tremie diameter
• Discharge to all tremies simultaneously until at least 3 m depth of concrete
• Thereafter keep difference in concrete level to a minimum
• Avoid repeated raising and lowering of the tremie (surging)
• Minimum tremie embedment 3 m (may be reduced to 2 m if concrete level
accurately known)
• Excessive tremie embedment to be avoided (preferably less than 10m)
• Remember the first concrete which enters the tremie will not usually reach the
top of the pour
29. How do we check trench stability?
OVERALL STABILITY
• Limit Equilibrium Method
• Finite Element Model
• Limit Analysis
T
T
G
θ
E
Ls
H
Y
X
Z
q
σy,surcharge
q‘K0
σy,poids
Q
φ
Ls
Z Z
Fc
dS
FoS required:
1.1 to 1.3
32. How to improve trench stability in poor ground
Standard measures
• Slurry level min 1.5m higher than
groundwater level
• Reinforcement continuity along guide
wall sections
• L-shaped guide walls
• Careful consideration of where to
position the plant
• Use short panels (single bite)
Additional measures
• Elevated guide walls (no more than 500mm)
• Increased density of support fluid
• Lower groundwater
• Ground improvement
34. Temporary works rebar – very important
Additional rebar to ensure safe:
• Fabrication
• Transportation
• On and off loading
• Storage
• Lifting from horizontal to vertical
• Hanging
• splicing
All elements require design e.g. bars,
welds and connectors
35. Horizontal to vertical lift – tandem lift
Tandem lifting points
@ top of z bars and cathedral bar
36. • Were developed to splice ropes, not
reinforcement bars
• Must use lowest tested strength and
robust procedure due to high
variation of tensile strength results
Cage splicing - Bulldog grips
37. New cage splicing systems - SuperlatchTM
• Size of
superlatch
varies with cage
weight
• No fingers in
cage
• Expensive but
safe
39. Conclusions
• Cast in situ concrete diaphragm and secant pile walls have many potential
applications in marine works
• Diaphragm walls in particular have been used on many quay wall projects
• Plant and material developments have brought opportunities and risks
• Recently published industry guidance designed to achieve better outcomes
in terms of quality and safety
• Good practice should be shared by all