Deep-foundation-pit high-pressure-bearing well and construction method thereof

Abstract

The invention provides a deep-foundation-pit high-pressure-bearing well and a construction method thereof. The deep-foundation-pit high-pressure-bearing well comprises a well main body, wherein a wellpipe is arranged in the well main body, and the well pipe is fixed to the inner wall of the well main body through a supporting mechanism; the well main body comprises an upper well body and a lowerwell body which are coaxially arranged, the inner diameter of the upper well body is larger than that of the lower well body, the space between the lower well body and the well pipe is filled with first-level filler, the space between the upper well body and the well pipe is filled with second-level filler, and a well lid is arranged at the top of the well main body; the well pipe comprises a bottom end cover, a filter pipe and a drainage pipe from bottom to top, the bottom end cover and the filter pipe are locked and fixed through fastening bolts, the filter pipe and the drainage pipe are fixed through fasteners, and the sum of the height of the bottom end cover and the height of the filter pipe is smaller than the depth of the lower well body; and according to the deep-foundation-pit high-pressure-bearing well, the pressure bearing capacity of the well is improved, construction is convenient, stability is good, and safety is high.

Description

technical field [0001] The invention relates to a high pressure water well, in particular to a deep foundation pit high pressure water well and a construction method thereof. Background technique [0002] With the rapid development of urbanization, rail transit and high-rise buildings are becoming more and more popular, and the construction of deep foundation pits will become a normal trend. In these projects, the treatment of groundwater is the first problem to be faced. Due to the dewatering requirements of the confined aquifer in the foundation pit or the anti-surge demand of the base, the decompression and dewatering well in the foundation pit is already a common way of dewatering, but often under high water head pressure, the plugging of the high water pressure dewatering well is another problem. In the later period, how to solve the blockage problems such as large diameter of precipitation well, high water level and rapid surge have become problems that modern buildin...

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used foundation pit dewatering wells mainly include cement gravel water filter pipes, and filter cloth or brown mesh is laid on the outside, but during the precipitation process under the condition of silt and fine sand stratum, fine silt particles can easily block the brown mesh Especially in the large-scale foundation pit precipitation of subway stations, due to the long precipitation cycle, the filter cloth or brown mesh will be blocked and rotted in the later stage, which seriously reduces the precipitation efficiency of the cement gravel filter pipe

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