Water-rich stratum tube well dense arrangement dewatering construction method

A construction method and technology for water-rich strata, applied in infrastructure engineering, construction, etc., can solve the problems of inability to dewater the foundation pit, low construction efficiency, complicated operation, etc. Effect

Pending Publication Date: 2022-04-29
WUHAN YIYE CONSTR ENG +1
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Problems solved by technology

At present, for this type of foundation, the common dewatering method in the foundation pit construction stage is mainly the tube well dewatering method. Although this dewatering method is widely used, due to its inherent limitations, it is impossible to quickly and thoroughly dewater the foundation pit. Complex, low construction efficiency, high cost

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  • Water-rich stratum tube well dense arrangement dewatering construction method

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] A construction method for densely arranged tube wells in a water-rich formation, comprising the steps of:

[0022] S1. Check the inrush stability according to the actual situation on site. When precipitation is required, check the historical data of the rise and fall of the local water level and the highest water level, combined with the data of the deep underground sand layer on the site, according to the construction period, on the premise of meeting the precipitation requirements Next, the arrangement of tube wells is optimized to avoid hidden dangers to the waterproofing of the main structure caused by too dense tube wells, and the position of each tube well is obtained.

[0023] Such as figure 1 As shown, in this embodiment, when checking the surge stability, the calculated value K of the surge stability safety factor is obtained first, and...

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Abstract

The invention discloses a water-rich stratum tube well dense arrangement dewatering construction method, which comprises the following steps of: carrying out inrush stability checking calculation according to the actual site condition, optimizing the tube well arrangement, carrying out site measurement and setting out, lowering a protective cylinder as a wellhead, drilling by adopting a slurry wall protection casing method, lowering dewatering tubes section by section through lifting equipment with a guiding function, and carrying out water-rich stratum tube well dense arrangement dewatering construction. The method comprises the following steps: putting a puncher near the bottom end of a downcast pipe, injecting flushing fluid, putting gravel into an annular space between the downcast pipe and a pipe well, filling by using clay in a layered manner, sealing to the ground surface by using original soil, arranging a downcast pipe well branch pipe and connecting the downcast pipe well branch pipe with a drainage main pipe surrounding the edge of a foundation pit, putting a submersible pump, repeatedly pumping water until the pumped water is clean, and trying to pump water. The water level in the well is monitored daily, after precipitation is completed, the submersible pump is shut down and recycled, and a well mouth is plugged. The method is small in occupied space, few in equipment, simple to operate, cost-saving, high in precipitation efficiency and easy to manage.

Description

technical field [0001] The invention belongs to the field of dewatering construction, and in particular relates to a dewatering construction method with dense arrangement of tube wells in water-rich formations. Background technique [0002] For construction sites near rivers, rivers, lakes, seas and other areas, the groundwater level is relatively high, the foundation soil is mostly alluvial soil, and the surface layer is mostly soil layers with low permeability coefficients such as silt, silty soft clay and silt. The soil layer is usually thick, and the soil layer often contains sand and gravel interlayers with high water permeability. At present, for this type of foundation, the common dewatering method in the foundation pit construction stage is mainly the tube well dewatering method. Although this dewatering method is widely used, due to its inherent limitations, it is impossible to quickly and thoroughly dewater the foundation pit. Complex, low construction efficiency ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D19/10
CPCE02D19/10
Inventor 赵映廖红玉朱艳华
Owner WUHAN YIYE CONSTR ENG
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