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Plugging method of deep well with high return seepage and dewatering

A deep well and sewage pump technology, applied in construction, infrastructure engineering and other directions, can solve the problems of a large number of cracks in the well-sealed concrete, the concrete cannot be poured normally, and the initial setting time is insufficient, so as to improve the well-sealing success rate and construction safety. , the effect of fast blocking speed

Active Publication Date: 2020-11-03
CHINA MCC20 GRP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The concrete cannot be poured normally, the initial setting time is insufficient after pouring, and a large number of cracks are generated on the surface of the sealed well concrete, which leads to major problems such as quicksand, piping or floating of the entire floor, and even causes the entire structural damage

Method used

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  • Plugging method of deep well with high return seepage and dewatering

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of plugging method of deep well with high back seepage dewatering, such as figure 1 Shown: Follow the steps below to implement in sequence:

[0019] a. Use submersible pumps or sewage pumps to continuously pump water from deep wells as a measure of precipitation, and control and stabilize the water level below 1.5m from the wellhead:

[0020] The selected submersible pump is 150QJ20-156, the motor power is 15kw, the efficiency is 64%, and the flow rate is 20m 3 / hour, head 156m, rotational speed 2850r / min, direct connection with coupling, rated voltage 380V, frequency 50hz, rated current 35.62A, number of impeller stages 21, outlet diameter 2 inches;

[0021] The selected sewage pump is 80PW type, the impeller suction mode is single suction type, and the flow rate is 80m 3 / hour, lift 26m;

[0022] b. Fill well-graded sand and gravel in the well pipe of the dewatering deep well as a water stop measure, control the water level below 1.5m from the wellhead, and ...

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Abstract

The invention relates to the field of a method for keeping an underground foundation section or other area dry by reducing an underground water level, in particular to a blocking method of a high-back-infiltration dewatering deep well. The blocking method of the high-back-infiltration dewatering deep well is characterized by being sequentially implemented according to the following steps: a, dewatering; b, stopping water; c, casting; and d, curing. The blocking method is great in blocking and water stopping effects, simple to operate, low in fees and high in work efficiency.

Description

technical field [0001] The invention relates to the field of methods for keeping underground foundation sections or other areas dry by lowering the groundwater level, in particular to a plugging method for deep wells with high re-seepage and dewatering. Background technique [0002] In construction projects, many projects are built along rivers and coasts, or close to rivers on many sides, resulting in abundant water and high water levels in construction areas. For this kind of project, the method of excavating and dewatering is generally used for construction, and the depth of the well generally ranges from 30m to 50m. After the construction of the main body is completed, the dewatering well must be sealed with a sealing process, generally using the concrete pouring process, but at this time the water level in the construction area is often far lower than the surrounding water level, and once the precipitation stops, a large amount of surrounding groundwater will seep back ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D19/10E02D19/16
Inventor 施群凯范作锋杨前雍正海康朝辉任超
Owner CHINA MCC20 GRP CORP