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A method for excavating a foundation pit above an operating subway tunnel

A technology for foundation pits and tunnels, which is applied in excavation, infrastructure engineering, construction, etc., can solve problems such as uneconomical, poor effect, and enlarged protective structures, so as to improve safety and reliability, avoid repeated deformation of tunnels, and reduce tunnel damage. deformation effect

Inactive Publication Date: 2016-10-05
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The country and the people have higher and higher requirements for safety; increasing the protection structure without limit is neither economical nor environmentally friendly, and the effect is not good

Method used

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  • A method for excavating a foundation pit above an operating subway tunnel
  • A method for excavating a foundation pit above an operating subway tunnel

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Embodiment Construction

[0022] Below in conjunction with specific embodiment, further illustrate the present invention.

[0023] As shown in the figure: a method for excavating a foundation pit above an operating subway tunnel, characterized in that it includes the following steps:

[0024]Step 1, according to the size of the foundation pit, determine the contour line (2) of the foundation pit and determine the relative positional relationship between the division area of ​​the foundation pit and the subway tunnel. This method divides the foundation pit into five areas: foundation pit I (4), Foundation Pit II (8), Foundation Pit III (14), Foundation Pit IV (16) and Foundation Pit V (17), said Foundation Pit I (4), Foundation Pit III (14) and Foundation Pit II (8) Located below the horizon (1) from left to right, there is a foundation pit IV (16) below the foundation pit I (4), a foundation pit V (17) below the foundation pit II (8), and a foundation pit III ( 14) below is the operation subway tunnel...

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Abstract

The invention relates to an excavation method for a foundation pit above an operation railway tunnel. According to the size of the foundation pit, the outline (1) of the foundation pit is determined, the relative position relation between a foundation pit division region and the railway tunnel is determined, and according to the method, the foundation pit is divided into five regions which include a foundation pit body I (4), a foundation pit body II (8), a foundation pit body III (14), a foundation pit body IV (16) and a foundation pit body V (17). In this way, before the foundation pit is excavated, a concrete protection shell is formed around the tunnel in advance, and influences on the operation tunnel by excavation of the foundation pit are reduced to the maximum degree. The purpose is to overcome the defects and excavate the foundation pit above an operation railway, and the excavation and tunnel protection method for the foundation pit above the operation railway achieves the effect that the operation railway tunnel is closed before the foundation pit above the operation railway tunnel is excavated, so that the operation railway tunnel is not disturbed by excavation of the foundation pit at all.

Description

technical field [0001] The patent of the present invention relates to a method for excavating a foundation pit above an operating subway tunnel. Background technique [0002] With the rapid development of cities in our country, urban traffic is becoming more and more congested, which seriously restricts the development of cities. As a public transportation mode, the subway plays an increasingly important role in urban traffic. As the lifeline project of the national city, the subway project should strengthen the protection of the existing subway in the subsequent construction. In addition, in urban development, in order to make full use of urban land resources, it is inevitable to excavate foundation pits within the protected area of ​​the subway. For example, the Xiqing Road sinking tunnel project of the transportation hub of Tianjin West Railway Station spans the existing box project in the section of Tianjin Metro Line 1; the Shanghai East-West Passage crosses the Metro ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/02
CPCE02D17/02
Inventor 靳晓光李亚勇孙志岗侯晓鹤张瑞谢继安
Owner CHONGQING UNIV
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