General Information of Retaining Walls about its type, design and functionality; This file does not comprise of detail study of the Retaining Walls but for a startup it may help students!!!
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.
A shallow foundation is a type of building foundation that transfers building loads to the earth very near to the surface, rather than to a subsurface layer or a range of depths as does a deep foundation. Shallow foundations include spread footing foundations, mat-slab foundations, slab-on-grade foundations, pad foundations, rubble trench foundations and earthbag foundations.
Get PPT here
https://civilinsider.com/design-philosophies-of-rcc-structure/
www.civilinsider .com
www.civilinsider .com
www.civilinsider .com
www.civilinsider .com
Various design philosophies have been invented in the different parts of the world to design RCC structures. In 1900 theory by Coignet and Tedesco was accepted and codified as Working Stress Method. The Working Stress Method was in use for several years until the revision of IS 456 in 2000.
What are the Various Design Philosophies?
Working Stress Method
limit state method
ultimate load method
#civil insider
The vacuum dewatering process basically improves strength, durability, and other properties of concrete by reducing the water-cement ratio immediately after the mix is placed, usually in floors and other flatwork. A Bridgeport, Connecticut vacuum dewatering demonstration, although it involved no new ...
vacuum dewatering system
vacuum dewatering pump
vacuum dewatering box
wellpoint pump systems
dewatering pump system
dewatering pump
dewatering wellpoint
small wellpoint dewatering systems
interesting civil engineering topics
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General presentation of under-reamed piles. Mainly for diploma engineers, it is really helpful as its objective, dimensions, usage, etc are shown with proper images. It will really helpful for the basic knowledge of under-reamed piles.
- The Caissons is used for the purpose of placing a foundation in correct position under water.
- Three types of Caissons
1) Open Caisson
2) Box Caisson
3) Pneumatic Caisson
General Information of Retaining Walls about its type, design and functionality; This file does not comprise of detail study of the Retaining Walls but for a startup it may help students!!!
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.
A shallow foundation is a type of building foundation that transfers building loads to the earth very near to the surface, rather than to a subsurface layer or a range of depths as does a deep foundation. Shallow foundations include spread footing foundations, mat-slab foundations, slab-on-grade foundations, pad foundations, rubble trench foundations and earthbag foundations.
Get PPT here
https://civilinsider.com/design-philosophies-of-rcc-structure/
www.civilinsider .com
www.civilinsider .com
www.civilinsider .com
www.civilinsider .com
Various design philosophies have been invented in the different parts of the world to design RCC structures. In 1900 theory by Coignet and Tedesco was accepted and codified as Working Stress Method. The Working Stress Method was in use for several years until the revision of IS 456 in 2000.
What are the Various Design Philosophies?
Working Stress Method
limit state method
ultimate load method
#civil insider
The vacuum dewatering process basically improves strength, durability, and other properties of concrete by reducing the water-cement ratio immediately after the mix is placed, usually in floors and other flatwork. A Bridgeport, Connecticut vacuum dewatering demonstration, although it involved no new ...
vacuum dewatering system
vacuum dewatering pump
vacuum dewatering box
wellpoint pump systems
dewatering pump system
dewatering pump
dewatering wellpoint
small wellpoint dewatering systems
interesting civil engineering topics
civil engineering topics for presentation
civil seminar topics ppt
civil engineering seminar topics 2018
best seminar topics for civil engineering
seminar topics pdf
seminar topics for mechanical engineers
seminar topic for civil engineering pdf
General presentation of under-reamed piles. Mainly for diploma engineers, it is really helpful as its objective, dimensions, usage, etc are shown with proper images. It will really helpful for the basic knowledge of under-reamed piles.
- The Caissons is used for the purpose of placing a foundation in correct position under water.
- Three types of Caissons
1) Open Caisson
2) Box Caisson
3) Pneumatic Caisson
My presentation slide of Retaining Wall,Cofferdam and Caissonm8main
First Individual Slide in Civil Engineering Department.
The Course Name: Details of Construction
Presentation about A brief introduction to Retaining Wall,Cofferdam and Caisson. There types and how it works.
this presentation describes in details the sinking operation of well foundations in different conditions and situations. the content here is suitable only for basic knowledge and educational purposes.
well foundation of six lane new ganga bridge near kacchi dargah in district P...Arman Hashmi
WELL FOUNDATION PPT, well foundation of six lane new ganga bridge near kacchi dargah in district Patna on NH-30 to near Bidupur in vishali district on NH-103 from bihar state road developement corporation limited
Caisson foundations, also known as pier foundations, are prefabricated hollow substructures designed to be constructed on or near the surface of the ground, sunk to the desired depth and then filled with concrete, thus ultimately becoming an integral part of the permanent structure.
Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
How to Create Map Views in the Odoo 17 ERPCeline George
The map views are useful for providing a geographical representation of data. They allow users to visualize and analyze the data in a more intuitive manner.
Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptxEduSkills OECD
Andreas Schleicher presents at the OECD webinar ‘Digital devices in schools: detrimental distraction or secret to success?’ on 27 May 2024. The presentation was based on findings from PISA 2022 results and the webinar helped launch the PISA in Focus ‘Managing screen time: How to protect and equip students against distraction’ https://www.oecd-ilibrary.org/education/managing-screen-time_7c225af4-en and the OECD Education Policy Perspective ‘Students, digital devices and success’ can be found here - https://oe.cd/il/5yV
The Indian economy is classified into different sectors to simplify the analysis and understanding of economic activities. For Class 10, it's essential to grasp the sectors of the Indian economy, understand their characteristics, and recognize their importance. This guide will provide detailed notes on the Sectors of the Indian Economy Class 10, using specific long-tail keywords to enhance comprehension.
For more information, visit-www.vavaclasses.com
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
2. COFFER DAMS AND
CAISSONS
Presented By:
• M. Rizwan Riaz 2011-MS-CES-01
(rizwansamor@gmail.com)
• Muhammad Ammar 2011-MS-CES-34
Presented To:
Prof. Dr. Aziz Akbar
2
3. CONTENTS
The discussion is divided into the following sections :
• Coffer Dams
– Introduction
– Types of Coffer Dams
– Environment Friendly Coffer Dams
– Case Study
• Caissons
– Introduction
– Types of Caissons
• References 3
4. Coffer Dams
• A temporary structure designed to keep water and/or
soil out of the excavation in which some structure is
to be built.
• When construction must take place below the water
level, a cofferdam is built to give workers a dry work
environment.
4
11. Environment Friendly Coffer Dams
(Portable Coffer Dams)
• Instead of using outdated sand bags and
earthen fill, “DamitDams” patented water-
filled cofferdams
• Made of a heavy-duty geotextile woven
polypropylene outer casing that contains
two side-by-side inner tubes.
11
15. Portable Coffer Dams
• Effective water-barrier dam leaving only a
minimal footprint on the environment.
• Use onsite water
• Portable and re-usable.
• Available in eight different heights: 1-2-3-4-6-8-
10 and 12 feet.
• Can be extended to any length necessary, using
the extension coupling system
• Flexible, easy to install, steer or turn precisely
15
24. Rehabilitation Project
• Scope:
– Construction of Sub-Weir D/S of Old Structure
• Contractors:
– Descon Engineering Limited & Chinese Gazooba Corporation
• Duration :
– 2 years (October-June)
• Cost:
– Subweir Construction PKR 3 billion
– Coffer Dams Construction 700 million PKR
24
27. Cofferdam Cross Section
• Stone fill was provided to break the erosive
action of the flowing river (design velocity of
8-10 fps was used to compute the stone size of
≥100lb)
• Earthfill was provided for a water tight section
minimizing the water flow across CD body.
• Sheet Piles were installed to cut seepage rate
across the earthfill and improve its stability.
27
28. Construction Methodology and
Compaction
• The construction in flowing water was carried out
by means of heavy machinery like dozers, dump
trucks and excavators, weighing from 10 to 15 tons,
moving freely on top of the newly constructed
embankment.
• The stone dump was constructed in advance of the
earth fill embankment which was constructed in its
shadow.
28
34. Quantities of Material used in Phase I
• Earth Filling =11.46 M cft (324,394 m3 )
• Stone = 100,000 cft (3000 m3)
• Sheet Piles Area = 224,000 sft
• Depth = 35-40 ft
34
Stock piles maintained at site to ensure un-
interrupted supply.
35. Dewatering
• Dewatering required surface water removal and
lowering of the subsurface water levels.
• The operation required installation of a large
number of tubewells along with pumps and screens
in the substrata
• Dewatering in the subweir area was the most
demanding and critical to construction work.
• Detailed seepage analyses were carried out to
ensure required water levels.
35
40. WHAT IS CAISSON?
It’s a prefabricated hollow box or cylinder.
It is sunk into the ground to some desired
depth and then filled with concrete thus
forming a foundation.
Most often used in the construction of bridge
piers & other structures that require foundation
beneath rivers & other bodies of water.
This is because caissons can be floated to the
job site and sunk into place.
41. Basically it is similar in form to pile
foundation but installed using different way
Used when soil of adequate bearing strength
is found below surface layers of weak
materials such as fill or peat.
It’s a form of deep foundation which are
constructed above ground level, then sunk to
the required level by excavating or dredging
material from within the caisson.
42. A caisson foundation consists of concrete
columns constructed in cylindrical shafts
excavated under the proposed structural
column locations
Caissons are drilled to bedrock or deep into
the underlying strata if a geo technical
engineer find the soil suitable to carry the
building load.
65. Caisson Disease
In case of sinking process of pneumatic caisson,
workers working under pressure may suffer from
“Decompression sickness” (Caisson disease) due to
rapid change in pressure
• There is pains in ears of workmen
• There is breaking of ear drums of workmen
• There is bursting of blood vessels in the nose
or ears of workmen
65
66. Factors affecting choice of
Caissons
• Uneven applied loading & no firm strata at
reasonable depth, making use of raft unadvisable.
• Firm strata exists at such depth, where
construction of strip footing is uneconomical.
• Pumping of ground-water is costly & shoring is
difficult.
• Heavy load must be carried to water-logged or
unstable soil, where large number of piles with
large pile caps is uneconomical.
• Plan area of construction is small and water is
deep. 66
67. American Concrete Institute (ACI)
• American Concrete Institute (ACI)
committee 336 has two specifications.
1. Standard Specification for the Construction
of Drilled piers (Caissons)
2. Design & Construction of Drilled piers
(Caissons)
67
68. American Petroleum Institute (API)
• American Petroleum Institute (API)
provides guidelines and specifications
for the Design & Construction of
offshore Caissons.
68
75. References
• Muhammad Nadeem, “Cofferdam construction and dewatering
taunsa barrage rehabilitation project”, Pakistan Engineering
Congress, 71st Annual Session Proceedings, Paper No. 683.
• Ijaz-ul-Hassan Kashif, “Director proc & contract administration,
PMO Punjab Barrages, “Construction of small dams in Potohar
plateau of Punjab Province”
• www.en.wikipedia.org/wiki/File:OlmstedRendering08_2012.jpg
• www.theconstructor.org/geotechnical/all-about-coffer-dam
• www.donegan.co.uk
• www.ceephotos.karcor.com
• www.damitdams.com
75
76. References (Caissons)
• Pile Design & Construction Practice (4th Ed.) by M. J.
Tomlinson
• Construction Technology for tall buildings (3rd Ed.) by M.
Y. L. Chew, Michael Chew Yit Lin
• Foundation Analysis & Design (5th Ed.) by Joseph E.
Bowles
• Pile Foundation Design & Construction by Dr. Gue S. Sew
• Deep Foundation Institute (www.dfi.org)
• Wikipedia (www.wikipedia.org)
• The Constructor Organization (www.theconstructor.org)
76
Allow excavation and construction of structures in otherwise poor environmentProvides safe environment to work Steel sheet piles are easily installed and removedMaterials can typically be reused on other projects
www.donegan.co.uk
I.H. Kashif, CONSTRUCTION OF SMALL DAMS IN POTOHAR PLATEAU OF PUNJAB PROVINCE
Ref: Muhammad Nadeem, P.E.C, 71st Annual Session,Paper No. 683
This is the view showing the downstream weir which is to be built. To keep the river flowing, the work plan was to divide the work in low flow months in 2 years. Half of the weir was to be built in first year and the other half in second year. A total length of 12 km length of CDs was constructed during the project.Muhammad Nadeem, P.E.C, 71st Annual Session,Paper No. 683
Muhammad Nadeem, P.E.C, 71st Annual Session,Paper No. 683
Proposed coffer dam was hybrid type with following materials used