Grouting sealing bag type dewatering well wall water stop structure

Abstract

The invention relates to a grouting sealing bag type dewatering well wall water stop structure. The upper end and the lower end of at least one sealing bag are fixed to a well pipe, at least one grouting pipe extends into the well pipe from an upper end opening, the grouting pipe transversely penetrates through a wall hole which is reserved in the well pipe through a bypass valve which is arrangedon the grouting pipe and communicates with the inner part of the sealing bag. According to the grouting sealing bag type dewatering well wall water stop structure, the construction quality is reliable, the grouting pipe is arranged in the inner part of the well pipe, the quality is reliable, the quality problem caused by binding gaps between the sealing bag and the well pipe and between the sealing bag and the grouting pipe when the grouting pipe is arranged on the outer side of the well pipe and bounding together is carried out is effectively avoided; and well wall water stopping is reliable, and compared with a traditional well wall water stopping process, the well wall and surrounding soil are extruded through expansion after grouting of the sealing bag, and the well wall water stopping reliability is guaranteed through the high grouting pressure.

Description

technical field [0001] The invention relates to a dewatering well, in particular to a grouting sealed bag type dewatering well wall water-stop structure, which belongs to the technical field of groundwater dewatering wells. Background technique [0002] In the existing dewatering well construction technology, the usual process is hole forming, well pipe running, gravel filling, water stop, well flushing, well forming, pumping or recharging. The general well wall water stop measure is to backfill a certain thickness of high-quality clay balls, and the well wall grouting can also be implemented in the case of high requirements. [0003] In the current water-stopping measures for the well wall, the quality of the clay balls is difficult to control. If the sand content is large, it will easily lead to the failure of water-stop sealing; directly grouting the soil around the well wall, because the grouting fluid cannot be controlled in the soil The flow in the body, the grouting ...

AI Technical Summary

Problems solved by technology

However, the grouting pipe needs to be inserted into the sealed bag. When the sealed bag is sealed and bound, there will be a gap between the grouting pipe and the well wall, which will cause the grout to flow out from the gap and fail to reach the specified grouting pressure.

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