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Subway station deep foundation pit construction method under water-rich geological condition

A technology based on geological conditions and subway stations. It is applied in infrastructure engineering, infrastructure testing, and construction. It can solve problems such as uneven settlement of the ground surface, low strength of soft soil, and tunnel leakage disasters. Pipe depth, avoid construction accidents, and improve the effect of site utilization

Pending Publication Date: 2021-09-03
CHINA RAILWAY 12TH BUREAU GRP +1
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The soft soil has low geological strength and high permeability. Uneven settlement may occur during the construction of the subway shield tunnel and in the later stage of operation and maintenance. When the subway construction is carried out in areas with dense rivers, high groundwater levels, and sufficient surface water replenishment, uneven settlement may occur. The settlement will accelerate the occurrence of leakage disasters in the tunnel, and the leakage phenomenon will promote the uneven settlement of the ground surface, which will cause major engineering accidents

Method used

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Embodiment Construction

[0024] The following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0025] The construction method of the deep foundation pit of the subway station under the geological condition of rich water includes the following steps:

[0026] S1. Construction site planning and layout: Extract the site elevation from design documents, generate a BIM site 3D model, process and analyze the processed terrain files, and provide basic data such as elevation, grading, filling and excavation during the construction phase;

[0027] S2. Pipeline cut and change;

[0028] S3. Construction of underground diaphragm wall: B...

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Abstract

The invention relates to the technical field of subway construction, in particular to a subway station deep foundation pit construction method under the water-rich geological condition. The construction method comprises the following steps that S1, a construction site is planned and arranged; S2, pipeline cutting and changing are carried out; S3, underground diaphragm wall construction is carried out; S4, foundation pit excavation numerical simulation is carried out; S5, a foundation pit is excavated, wherein S51, the foundation pit is dewatered; and S52, earth excavation is conducted. According to the construction method, influence analysis and scientific simulation analysis of complex geological conditions on the subway station are carried out, such that risks possibly encountered in the construction process can be avoided, the construction safety is improved, the construction quality and the construction process safety are guaranteed, construction accidents are avoided to the maximum extent, and the construction efficiency is remarkably improved. The method is mainly applied to subway station deep foundation pit construction under the water-rich geological condition.

Description

technical field [0001] The invention relates to the technical field of subway construction, and more specifically relates to a construction method for deep foundation pits of subway stations under water-rich geological conditions. Background technique [0002] The soft soil has low geological strength and high permeability. Uneven settlement may occur during the construction of the subway shield tunnel and in the later stage of operation and maintenance. When the subway construction is carried out in areas with dense rivers, high groundwater levels, and sufficient surface water replenishment, uneven settlement may occur. The settlement will accelerate the leakage disaster in the tunnel, and the leakage will promote the uneven settlement of the ground surface, which will cause major engineering accidents. Contents of the invention [0003] In order to overcome the deficiencies in the above-mentioned prior art, the present invention provides a construction method for deep fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/02E02D19/10E02D5/18E02D17/04E02D33/00
CPCE02D17/02E02D19/10E02D5/18E02D17/04E02D33/00
Inventor 王可心王涛芦晓鹏曹晖樊华孙雪双魏军田文茂
Owner CHINA RAILWAY 12TH BUREAU GRP
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