Sludge soil draining and dewatering system and construction method

Abstract

The invention relates to a draining and dewatering system, in particular to a sludge soil draining and dewatering system and a construction method. The sludge soil draining and dewatering system comprises sand-containing water flow subsystems, a high-pressure rotary spraying subsystem and an draining well subsystem; a plurality of sand-containing water flow subsystems are arranged around the drainage well subsystem and are respectively connected with the high-pressure rotary spraying subsystem; sludge soil is replaced by sand-containing water through the high-pressure rotary spraying subsystem, so that a horizontal drainage body is formed; the high-pressure rotary spraying subsystem comprises a plurality of pipes, a nozzle is arranged at the bottom of the high-pressure rotary spraying subsystem, and the upper part of the high-pressure rotary spraying subsystem is respectively connected with a water pump, an air compressor and a vacuum pump; the sand-containing water flow subsystem comprises a sand-containing water pump and a sand-containing water bucket connected with the multiple pipes through the sand-containing water pump; the drainage well subsystem comprises a drainage well, a drainage pump is arranged in the drainage well, and water permeable holes are formed in the side wall of the drainage well. Compared with the prior art, the sludge soil is replaced with a soil body with good permeability through sand-containing water preparation, high-pressure water flushing, high-pressure rotary spraying, horizontal drainage and the like, permeation and collection of underground water are facilitated, and then the purpose of drainage and dewatering is effectively achieved through the drainage well.

Description

technical field [0001] The invention relates to a dewatering and dewatering system, in particular to a silty soil dewatering and dewatering system and a construction method. Background technique [0002] The existence of groundwater will have adverse effects on underground engineering. In many construction projects, especially foundation pit engineering, it is often necessary to dewater and dewater. If the drainage is not good, it will lead to large deformation of the foundation, unfavorable force on the enclosure structure, damage to the pile foundation due to soil flow, subsidence of the excavator, high water content of the soil transported abroad, and water pollution to the environment. [0003] Silt soil is a soft soil with three highs and two lows (high compressibility, high water content, high rheology and creep, low strength and low permeability). For sites with muddy soil layers, drainage is very difficult. As a result, it is difficult to use large-scale equipment o...

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Problems solved by technology

[0006] Although the existing vacuum pumping method has a certain effect on improving the drainage efficiency of silty soil, the drainage is slow and takes a long time, and the artificially formed drainage channels will automatically heal over time, resulting in the gradual deterioration of the drainage effect

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