Soft soil foundation pit dewatering device

Abstract

The invention discloses a soft soil foundation pit dewatering device. The device comprises a plurality of water collecting wells positioned on the periphery of a foundation pit, and a steel pipe is arranged in the water collecting well in a sleeved mode; a plurality of holes are uniformly distributed in the steel pipe, and sand gravel is filled between the inner walls of the water collecting wellsand the outer wall of the steel pipe; the outer wall of the steel pipe is wrapped with geotechnical cloth, and a water pump is arranged at the bottom, close to the steel pipe, of the inner cavity ofthe steel pipe; a water pumping hole of the water pump is connected with a water pumping pipe, and a sliding groove is vertically formed in the inner wall of the steel pipe located below the water pumping pipe; and a filtering mechanism is arranged below the water pumping pipe in the steel pipe, wherein the first filter screen and the second filter screen are horizontally arranged in the steel pipe in sequence from bottom to top, the two sides of the first filtering frame are correspondingly connected with the sliding groove through the first sliding blocks, the two sides of the second filtering frame are correspondingly connected with the sliding groove through second sliding blocks, and a connecting rod is arranged between the first sliding block and the second sliding block; a second baffle rod is horizontally arranged at the top end of the sliding groove; and an elastic floating device is arranged between the top of the second sliding block and the second baffle rod.

Description

technical field [0001] The invention relates to the technical field of foundation pit dewatering construction, in particular to a soft ground foundation pit dewatering device. Background technique [0002] With the unprecedented development of geotechnical engineering in my country, the number of foundation pit projects in my country is increasing, and the scale is also increasing. The depth of foundation pits is also deepening, and the complex groundwater geological conditions make the precipitation of foundation pits rise rapidly. Among them, in the excavation and support of soft soil foundation construction, especially in the construction of plastic silt foundation, the soil has a high moisture content and is soft. Construction equipment is often trapped in the soil after entering the site, which affects the construction progress. The soil consolidates slowly, has high water content, and has high fluidity, which brings certain safety hazards to the project. When the found...

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Problems solved by technology

[0002] With the unprecedented development of geotechnical engineering in my country, the number of foundation pit projects in my country is increasing, and the scale is also increasing. The depth of foundation pits is also deepening, and the complex groundwater geological conditions make the precipitation of foundation pits rise rapidly. Among them, the excavation and support of soft soil foundation construction, especially in the construction of plastic silt foundation, the soil has a high moisture content and is soft, and construction equipment is often trapped in the soil after entering the site, which affects the construction progress

Slow soil consolidation, high water content, and high fluidity bring certain safety hazards to the project

When the foundation pit is excavated to a certain depth, the conventional method is to support the foundation pit, and to support the rock and soil around the construction site, but soil instability, leakage and even bending deformation of the retaining structure often occur, affecting the site Worker safety and construction progress;

[0003] Moreover, after excavation of the foundation pit, due to the cut off of the aquifer, groundwater will continue to seep into the foundation pit under the action of pressure difference. The use of dewatering wells to pump water is an effective way to ensure the stability of the bottom of the foundation pit against inrush. It is very difficult to control the sand production of the tube well in sandy soil and silty soil stratum, and the water in the dewatering well will be mixed with impurities and mud. Blockage occurs and leakage of electricity causes damage to the water pump, thus affecting the drainage process

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