Water plugging method and device for gushing water in gap of steel sheet pile cofferdam

Abstract

The invention belongs to a water plugging method and device for water gushing in a gap of a steel sheet pile cofferdam. The device is composed of steel sheet piles, and the water plugging device for water gushing of the gap of the steel sheet pile cofferdam comprises a gap inflation water plugging structure or an inflation extrusion inner water plugging structure. The gap inflation water plugging structure is composed of a groove and an inflation bag, the groove is longitudinally formed in the lock catch position of the steel sheet pile, and the inflation bag is arranged in the groove; or the gap inflation water plugging structure is composed of an expansion bag and an inflatable bag with a protective layer. The air inflation extrusion inner water plugging structure is composed of a U-shaped steel plate, an extrusion plate, a water stop belt, a screw rod, an inner threaded hole and a handle. According to the method, only one inflation bag needs to be arranged at the lock catch position of every two adjacent steel sheet piles, if water leaks from the lock catch positions of the steel sheet piles, gas or liquid is injected into the inflation bags located at the water leakage lock catch positions through gas injection ports to enable the inflation bags to expand to block water leakage gaps at the lock catch positions, and water leakage blocking is achieved. The device is novel and simple in structure and design, good in using effect, low in water plugging cost and fast in water stopping.

Description

technical field [0001] The invention belongs to a method and a device for shutting off water gushing from gaps in steel sheet pile cofferdams. Background technique [0002] The steel sheet pile is a support structure below the river bed formed by the continuous and tight engagement of the locks on both sides of the steel sheet pile, and the steel sheet pile cofferdam is a temporary closed space surrounded by U-shaped steel sheet piles, which can prevent water, sediment, etc. It flows into the cofferdam to ensure the smooth progress of the internal engineering construction of the cofferdam (such as bridge piers or caps, etc.). Usually bridge piers or caps are set in the stratum below the river bed, and a cofferdam composed of steel sheet piles with a height of 12m can create ideal construction conditions for bridge piers or caps. The steel sheet pile cofferdam has high strength, good waterproof performance, changeable shape, It has the advantages of construction in deep wate...

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned series of water blocking and sealing methods have little effect when facing a large amount of water gushing from the steel sheet pile locks below the river bed, while the traditional methods of using hemp rope, canvas and other materials to plug the seams have poor water-stopping effects, and the hemp that is plugged Ropes, canvas and other materials are easily washed away by the external water gushing, making it impossible to stop the water. When the water stop cannot be completed, multiple pumps can only be used to pump water at the same time, but none of them can drain the seepage water in the cofferdam, which is a waste of resources. Large, also lead to the failure of normal construction in the cofferdam

At present, there is no internal advanced method for water blocking under the riverbed of the steel sheet pile cofferdam, and the external grouting water blocking is expensive, long construction period, and difficult to construct.

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