Double Wall Sheet Pile Cofferdam

A double wall sheet piling cofferdam comprises two straight parallel vertical walls of sheet piling tied to each other. They are cofferdams comprising two parallel rows of sheet piles driven into the ground and connected together by a system of tie rods at one or more levels. Double wall cofferdams are somewhat permanent in nature and are built to last for few years.

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08 Cofferdams

In deep waters where it is difficult to penetrate the guide piles or sheet piles into the hard bed below crib cofferdam is used.

Double wall sheet pile cofferdam.

Double walled cofferdam e crib cofferdam. The gap between the two rows of steel sheet piles is generally filled with granular material such as gravel or gravel. In this type of construction the sheet piles are supported by a series of wooden cribs. Double walled sheet pile cofferdams.

Double walled cofferdams are those in which two parallel rows of steel sheet piles are connected with means of a track or a plurality of steel enclosed purlin brackets. Typically single wall cofferdams are built using sheet piles. This consists of two straight parallel vertical wall of sheet piling tied to each other and the space between them filled with soil. When construction work can take many years single wall cofferdams may not be suitable.

This type of cofferdams if higher than 2 5 m should be strutted. The gap between walls is filled with soil. The width between the parallel piles is h 2 1 50 m. The space between the walls is generally filled with granular material such as sand gravel or broken rock.

Single wall cofferdams leaks and dewatering is required on a regular basis. Double wall sheet pile cofferdam higher than 7 5 feet should be strutted. This type of cofferdam is suitable when it is required to exclude water over 36 feet. Double wall sheet piling cofferdam.