Well sealing waterproof construction method for dewatering well

Abstract

The invention discloses a well sealing waterproof construction method for a dewatering well. The method comprises the following steps of: (1) constructing a foundation bed on the surrounding of the dewatering well; (2) embedding a steel sleeve for sealing the dewatering well in a foundation pit; (3) laying a waterproof roll material on the foundation bed, and then pouring a fine aggregate concrete protective layer on the waterproof roll material; (4) clamping a waterproof plate on the outer wall of the waterproof roll material on the outer wall of the steel sleeve in an abutted way; (5) clamping the waterproof plate by using a copper strip; (6) injecting a sealing adhesive to the waterproof plate; (7) pouring bottom plate concrete to the fine aggregate concrete protective layer; (8) pumping water; (9) embedding a sealing plate in the steel sleeve; (10) after filling gravels into a filling pipe, injecting a cement paste into a cement paste injection pipe, and stopping the injection of the cement paste until the paste in an overflow pipe flows out; and (11) pouring concrete into the steel sleeve above the sealing plate. Through the adoption of the well sealing waterproof construction method disclosed by the invention, a waterproof treatment problem at the connection of the dewatering well in the foundation pit and the foundation bottom plate in the whole dewatering well sealing waterproof system is solved.

Description

technical field [0001] The invention relates to a construction method for a dewatering well, in particular to a construction method for sealing and waterproofing a dewatering well. Background technique [0002] With the development of urban construction, the depth of the basement of the building continues to increase, and the foundation pit is getting deeper and deeper. The requirements for the precipitation of the foundation pit are also getting higher and higher. If the water level falls below the requirement, the foundation pit is prone to danger. Construction of deep foundation pits often requires excavation into aquifers below the groundwater table. Therefore, before excavation, the groundwater level must be lowered to below the slope surface and the bottom of the pit to prevent the slope from collapsing and gushing, and to ensure that the excavation is carried out under dry and hard working conditions during the construction process. The dewatering wells installed in ...

AI Technical Summary

Problems solved by technology

This patent only welds the water-stop plate on the outside of the steel pipe, and cannot fully guarantee the water-stop problem connected with the bottom plate

[0005] 2. The Chinese patent with the application number CN200820076584.0 discloses a "drainage well sealing device". When the groundwater pressure or water inflow is large, the existing method of sealing the precipitation well may cause hidden dangers in the quality of the plugging or the problem that it cannot be plugged

Therefore, this patent is only suitable for leaking caused by slight cracks in the water-stop curtain, and the waterproof layer of the adjacent water collection well is damaged.

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