Design Steel Sheet Pile Cofferdam

Subsection 704 steel sheet piling and cofferdams provide new or used continuous interlocking steel sheet piling including connections in corner pieces.

Design steel sheet pile cofferdam.

Between neighbors supports and at a defined depth to produce sufficient passive resistance. The main purpose of a cofferdam is to exclude soil and or water to form a safely supported excavation where construction works can progress. It is known in some countries as the allowable stress design asd for the sheet piles. Design method of single row cofferdam of steel sheet piles views.

The latest eurocodes are based on a semi probabilistic approach. 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. En 1997 part 1 ec 7 1 for the geotechnical design and en 1993 part 5 ec 3 5 for the steel sheet piles and bearing piles. A cofferdam is a substantially watertight enclosure consisting of steel sheet piling and structural bracing components which will permit substructure construction in waterways or other areas where the construction must be isolated from the surroundings.

The sheet piles are then braced on the inside and the interior is dewatered. They are formed from a single wall of sheet piles that is driven into the ground to form a box around the excavation. Such struc tures usually consist of vertical sheet piling walls forming a closed perimeter and braced internally or externally by a sys tem of structural members or ties. When construction must take place below the water level a cofferdam is built to give workers a dry work environment.

A cofferdam is a retaining structure usually temporary which is utilized to keep water or earth out of an excavation site until the permanent works are constructed. Provide minimum nominal section modulus of at least 18 1 cubic inches per foot of wall when installed next to traffic or supporting traffic.