Waterproof sheet pile cofferdam and construction method thereof

Abstract

A waterproof sheet pile cofferdam is provided with a plurality of cluster steel pipe piles; two adjacent cluster steel pipe piles are connected by steel plate baffles, each cluster steel pipe pile is formed by welding at least two steel pipes as the long pile of the cofferdam, each steel pipe is provided with a gap running through the steel pipe, limited blocks are arranged between the insertion edges of the steel plate baffles and the gaps, the steel pipes of the cluster steel pipe piles are internally provided with waterproof fillers prepared by the mixture of 40-50% of bentonite, 20-25% offly ash, 25-35% of red mud.

Description

technical field [0001] The invention relates to civil engineering cofferdam technology, in particular to a waterproof sheet pile cofferdam and a construction method thereof, which can be applied to deep-water foundation construction, soil retaining support structures, embankment protection banks, etc. in the fields of bridge engineering and port engineering. Background technique [0002] In the construction of bridge foundations and hydraulic structures, in order to prevent water and soil from entering the construction site of bridge piers or buildings, it is necessary to build a temporary cofferdam structure to drain water in the cofferdam, excavate foundation pits, and build buildings. When the water depth is shallow, soil cofferdams are generally used; in rivers with deep water and high flow velocity, wooden sheet piles or steel sheet pile cofferdams are generally used, and the cofferdams are generally removed after use. [0003] The traditional steel sheet pile cofferdam...

AI Technical Summary

Problems solved by technology

However, in actual engineering, water leakage and water seepage often occur in the steel sheet pile cofferdam. The main reason is that the old steel sheet piles have not been corrected before use or the steel sheet piles are inclined when they are driven in. The insertion is not tight, resulting in water leakage and water seepage at the lock

If there is a water leakage problem in the steel sheet pile, it is necessary to pump water while sliding a large amount of dry fine sand and sawdust along the joint of the steel sheet pile, and use the water pressure to suck the fine sand and sawdust into the joint to achieve the purpose of plugging; deformation Larger joints need to be stuffed with cotton wool after the purlins are arranged, which is troublesome to construct

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