Well point positioned pumping tubular well and well point positioned pumping method

Abstract

The invention is applied to the field of drain of tubular wells and provides a well point positioned pumping tubular well and a well point positioned pumping method. The pumping tubular well comprises a sand-free tube well section and a water storage tube well section, wherein the sand-free tube well section is positioned above a certain position of a first water-resisting layer below the precipitation depth of a foundation pit and is used for collecting a water source in a water-containing layer within the precipitation depth of the foundation pit; and the water storage tube well section is positioned below the certain position of the first water-resisting layer below the precipitation depth of the foundation pit, is connected with the sand-free tube well section and is used for storing the water source in the water-containing layer within the precipitation depth of the foundation pit. According to the well point positioned pumping tubular well and the well point positioned pumping method disclosed by the invention, by adopting a precipitation tubular well consisting of the sand-free tube well section and the water storage tube well section, the water source in the water-containing layer within the precipitation depth of the foundation pit is effectively collected, the effect that more water and the precipitated water are pumped without polluting an underground water source in an independent water-containing source below the precipitation depth of the foundation pit is realized, and the difficult problem that the water cannot be dredged under the condition that water cannot be dredged is solved. In addition, by adopting an automatic pumping method with a positioned water level, the total pumping time is greatly shortened and the cost of foundation pit engineering is greatly reduced.

Description

technical field [0001] The invention belongs to the field of tube well drainage, and in particular relates to a well point positioning pumping tube well and a well point positioning pumping method. Background technique [0002] Whether it is a high-rise building foundation or an underground building, when it is below the groundwater level, it is generally necessary to lower the groundwater level to ensure the convenience and safety of construction. Foundation pit dewatering reduces the groundwater level within the scope of the foundation pit within a certain period of time through pumping and drainage, so as to ensure the construction environment of the foundation pit excavation, and at the same time provide a strong guarantee for the stability of the foundation pit floor and slope. In terms of groundwater control methods, there are two types of groundwater control methods for foundation pits: water stop method and precipitation method. The water-stop method is to form a wa...

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a well point positioning pumping tube well, aiming to solve (1) the problem of "drainage and non-drying" of vertical well point precipitation in foundation pits, that is, in conventional vertical well point precipitation, the water in the vertical well will disappear once it is pumped, Once stopped, there will still be water during excavation, which will make the working surface of the foundation pit muddy, making it difficult for workers to construct, which will affect the construction progress. The water flow moves in the gap between coarse particles, which makes the soil layer hollowed out, causing uneven ground settlement, and even causing the foundation pit to slip and collapse, resulting in the loss of manpower and material resources

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