Tube well for simultaneously dewatering and decompressing and technology thereof

Abstract

A tube well and technologies for drainage, pressure reduction and dewatering pertain to the technical field of construction; the technical problem, the process optimization of the well points of a deep well dewatering function, is required to be solved; the tube well comprises a well pipe, a top-to-down vacuum pump, a filtering pipe, a submerged pump lower than the bottom of a foundation pit in the tube well, a top-to-down water-resisting clay for hole sealing, filter materials and water-resisting clay and filer materials lower than the foundation pit bottom outside the tube well, the invention also comprises a tube well water stopper inside the well pipe and below the submerged pump which meets the depth requirements of the submerged pump, matches with the diameter of the tube well and has the functions of easy adjustment and setting of depth and flexible water interception effect response. At the stage of drainage and dewatering stage, the water interception function of the water stopper is activated to facilitate the drainage and dewatering; and at the pressure reduction and dewatering stage, the water interception function is removed to realize the pressure reduction and dewatering of a confined aquifer. The invention has the advantages of lowing project cost, saving resources, accelerating construction progress, facilitating inside foundation pit operation, safe construction and easy operation.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, and in particular relates to a deep foundation pit applied to subway stations, working wells, air wells, shields, portals, pier foundation pits, power plant swirl pools (wells), and deep foundation pits of high-rise buildings. The process optimization technology of the tube well (also known as deep well) process structure for deep foundation pit dewatering in underground space projects; this optimization has achieved a technological breakthrough in replacing two well points with different dewatering functions with one well point. Background technique [0002] In various underground space projects such as deep foundation pits of subway stations, working wells, wind wells, shields, portals, foundation pits of bridge piers, swirl pools (wells) of power plants, deep foundation pits of high-rise buildings, etc., Due to the existence of groundwater (diving, confined water), it often ha...

AI Technical Summary

Problems solved by technology

[0004] ——Hinder the excavation operation in the pit and affect the excavation progress;

[0005] ——The probability of the well pipe being damaged by the excavator is high, which will affect the normal dewatering operation, and the damage of the decompression pipe well will also pose a threat to the safety and stability of the foundation pit floor;

[0006] ——Under the same environmental conditions of the foundation pit, the cost of well point materials, dewatering equipment and construction is relatively large

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