Design Steel Sheet Pile Cofferdam

They are formed from a single wall of sheet piles that is driven into the ground to form a box around the excavation.

Design steel sheet pile cofferdam. Used sheeting must be in good conditions. 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. The sheet piles are then braced on the inside and the interior is dewatered. Subsection 704 steel sheet piling and cofferdams provide new or used continuous interlocking steel sheet piling including connections in corner pieces.

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 main purpose of a cofferdam is to exclude soil and or water to form a safely supported excavation where construction works can progress. 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. Provide minimum nominal section modulus of at least 18 1 cubic inches per foot of wall when installed next to traffic or supporting traffic.

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. Between neighbors supports and at a defined depth to produce sufficient passive resistance. Sheet pile cofferdams are a specific form of a temporary works solution and as such is a cornerstone to the range of services offered by sheet piling uk ltd. 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.

The latest eurocodes are based on a semi probabilistic approach. It is known in some countries as the allowable stress design asd for the sheet piles.