Simple abd rapid water sealing method for larsen steel sheet pile cofferdam

Abstract

The invention relates to a simple and fast water stop method of a Larssen steel sheet pile cofferdam. The method comprises the following steps: firstly, verticality of the steel sheet pile is guaranteed, a vibrating pile driver is used for carrying out inserting and driving to the steel sheet pile, and enough butter is arranged in a locking notch of the steel sheet pile in the process of inserting and driving so as to guarantee the quality of the locking notch; after water leakage is found in the water-pumping process, grading coarse, sawdust powder and cement are adopted for mixing and then a leak-stopping pipe is arranged at the outer side of the steel sheet pile above the water-leaking position; leak-stopping mixed material is placed downward to the position needing to stop leakage by the leak-stopping pipe; and the coarse, the sawdust powder and the cement and the like are absorbed into a locking notch seam of the steel sheet pile with compact filling so as to achieve the water-stopping effect. The invention has the advantages of solving the water-stopping problem of the steel sheet pile, adopting the conventional material as the material for stopping the water and leakage, having low cost and simpler stirring and being capable of carrying out underwater leakage stop of the steel sheet pile fast and conveniently; the leak-stopping construction of the steel sheet pile is as follows: the difference of the internal and external water heads of the cofferdam and by the effect of absorption force of water flow, the coarse, the sawdust powder and the cement and the like are absorbed into the locking notch seam of the steel sheet pile with compact filling so as to achieve the water-stopping effect.

Description

technical field [0001] The invention relates to a water-stopping method when a steel sheet pile cofferdam is used to construct an underwater foundation of a bridge. It is suitable for water-stopping measures when the steel sheet pile leaks during the water pumping process after the steel sheet pile cofferdam bottom seal is completed in bridge construction. It belongs to the technical field of bridge construction. Background technique [0002] In the construction of bridge caps, when Larsen steel sheet pile cofferdams are used for caps in deep water areas, due to the large difference between internal and external water heads, serious water leakage often occurs and even the steel sheet pile cofferdams fail to be used as water retaining structures. For this reason, domestically invented Waterstop, underwater glue, etc., but its operation is inconvenient and the use effect is not good. Invention content: [0003] The purpose of the present invention is to overcome the above-...

AI Technical Summary

Problems solved by technology

[0002] In the construction of bridge caps, when Larsen steel sheet pile cofferdams are used for caps in deep water areas, due to the large difference between internal and external water heads, serious water leakage often occurs and even the steel sheet pile cofferdams fail to be used as water retaining structures. For this reason, domestically invented Waterstop, underwater glue, etc., but its operation is inconvenient and the use effect is not good

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