Bag grouting well wall sealing structure

Abstract

The invention provides a bag grouting well wall sealing structure. The structure is characterized by comprising a bag and a grouting pipe; the bag is fixed on the outer wall of a well pipe; the bag isconnected with the grouting pipe, and a grouting port of the grouting pipe extends to the ground; after the bag is grouted, the bag is expanded to a hole wall original soil body to be in full contactwith the original soil body or is expanded to be embedded in the original soil body. The bag grouting well wall sealing structure has the advantages that 1, the operation is simple, the effect is reliable, the purpose of well wall sealing can be achieved quickly; 2, the well wall sealing effect can be maximally improved, and the effect of resisting confined groundwater head pressure of the well wall can be improved, thereby ensuring the sealing effect of the well wall a relief well or recharge well.

Description

technical field [0001] The invention relates to a well wall water-stop structure of a pressure-relief well or a reinjection well, in particular to a bag-grouting well-wall water-stop for improving the water-stop strength of a pressure-relief well or a recharge well wall and realizing quick water stop The structure is used in deep foundation pit decompression and dewatering engineering and recharge engineering. Background technique [0002] In the prior art, high-quality clay balls of a certain thickness are backfilled in the relief well or the reinjection well wall as a water-stopping measure for the well wall, and the well wall grouting is implemented in the case of relatively high requirements. The existing technology has the following defects: a. The gap between the well wall and the hole wall is small, and the water-stop effect of backfilling is not easy to control, which may easily lead to poor water-stop effect due to backfilling of the well wall. The irrigation proce...

AI Technical Summary

Problems solved by technology

The existing technology has the following defects: a. The gap between the well wall and the hole wall is small, and the water-stop effect of backfilling is not easy to control, which may easily lead to poor water-stop effect due to backfilling of the well wall. The irrigation process is prone to water gushing on the well wall; b. Using backfill clay balls to stop water on the well wall, backfilling clay balls takes a long time to stabilize, and only after the clay balls settle and stabilize can an effective water stop effect be formed; c. Even if the well is used It is difficult to control the grouting pressure and the amount of grouting, and the grouting effect is not easy to guarantee, and the grouting effect cannot be tested.

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