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The steel sheet pile cofferdam Introduction
Steel sheet pile cofferdam is the most commonly used as a sheet pile cofferdam. With a locking steel sheet pile is steel, the cross section of the candy bar-shaped, Z-shaped trough, and so on, a variety of sizes and interlocking forms. Common are Larson-type, type, and so Lackawanna.
Its advantages: high strength, easy to break into the hard soil; construction in deep water, if necessary, add a ramp around the cage support. Waterproof performance; to form various shapes as needed cofferdam, and can be repeatedly used, therefore, it is widely used.
Often used in bridge construction the top of the caisson cofferdam, it is widely used. Column foundation, pile foundation of the cofferdam base and cut and so on.
These multi-use single-walled closed cofferdams, cofferdam within the vertical and horizontal support, if necessary, add a ramp around the cage support. Nanjing Yangtze River Bridge as the column base, have used circular steel sheet pile cofferdam, the diameter of 21.9 meters, 36 meters long steel sheet pile, a variety of sizes and interlocking forms. To be back to strength of underwater concrete requirements, pumping and pier cap construction, pumping design depth of 20 meters.
In Hydraulic Construction, the general construction area is large, often used to make cofferdam structure. It consists of many interconnected system composed of monomers, each monomer composition but also by a number of sheet piling, filled with soil solid monomer intermediate. The scope of the large envelope cofferdam, which can not support the weir wall support, each monomer alone can resist overturning, sliding and prevent the chain at the crack. Commonly used form of round and shaped next door.