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ABSTRACT: This paper presents an overview of the present state of construction of cofferdam techniques with special emphasis and a brief...

seminar report on types of cofferdams document file

ABSTRACT:

This paper presents an overview of the present state of construction of cofferdam techniques
with special emphasis and a brief on other techniques developed world over for mitigating
hydraulic forces on the temporary structures.

A cofferdam is a temporary structure designed to keep water and soil out of the excavation in
which a bridge pier or other structure is built. When construction must take place below the
water level, a cofferdam is built to give workers a dry work environment.
Sheet piling is driven around the work site, seal concrete is placed into the bottom to prevent
water from seeping in from underneath the sheet piling, and the water is pumped out. There
are different types of cofferdam, some are used to support excavation operation and some are
enclosed type box placed in the water.
The present case study deals with step by step procedure adopted at Pipav Port, Rajula
District, Gujarath. It depicts the intricacy of the management of the work at site and gives lot
of insights to such similar works involving details of bentonite slurry, rock bund, planning
and execution of interlocking sheet piles, reinforcement, concreting, plants and equipment,
Safety procedures to be adopted for the construction of cofferdam.

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