Method for controlling large deformation of soft rock single-track railway tunnel

A technology of single-track railway and control method, which is applied in tunnels, earthwork drilling, mining equipment, etc., and can solve problems such as reducing economic costs

Active Publication Date: 2020-11-10
SINOHYRDO ENG BUREAU 3 CO LTD +1
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  • Abstract
  • Description
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Problems solved by technology

[0003] The circular cross-section structure of the tunnel bears more uniform force, which can effectively improve the force-bearing form of the tunnel structure. However, blindly adopting a circular cross-section will cause unnecessary economic losses in labor and materials. The curvature of the arch waist and side walls of the railway tunnel section can not only ensure the structural bearing capacity requirements, but also reduce economic costs

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  • Method for controlling large deformation of soft rock single-track railway tunnel
  • Method for controlling large deformation of soft rock single-track railway tunnel

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Embodiment Construction

[0062] Such as figure 1 and figure 2 A method for large deformation control of a soft rock single-track railway tunnel is shown, comprising the following steps:

[0063] Step 1. Acquisition of in-situ stress parameters:

[0064] The tunnel detection area is selected in the tunnel section to be constructed, and the in-situ stress test of the tunnel detection area is carried out by using the casing stress relief method to obtain the first principal stress σ 1 , the second principal stress σ 2 , the third principal stress σ 3 ; where the first principal stress σ 1 greater than the second principal stress σ 2 , the first principal stress σ 1 The direction of the second principal stress σ 2 The direction of and the third principal stress σ 3 The directions are perpendicular to each other, the first principal stress σ 1 The angle between the projection on the ground plane and the direction of true north is the first principal stress σ 1 Azimuth α 1 , the first principal ...

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Abstract

The invention discloses a method for controlling large deformation of a soft rock single-track railway tunnel. The method comprises the following steps of 1, acquisition of crustal stress parameter; 2, acquisition of physical and mechanical parameters of a rock mass; 3, acquisition of a lateral pressure coefficient and judgement of large deformation of the tunnel; 4, establishment of a tunnel excavation section model and loading force analysis of the tunnel excavation section model; 5, determination of a tunnel excavation section contour; 6, excavation through a tunnel bench cut method and primary support construction; 7, tunnel lining structure construction; and 8, circulating tunneling till construction of a soft rock large-deformation section is completed. The method is simple in step,through optimization of the excavation section contour of the single-track railway tunnel, the bearing performance and deformation resistance of a tunnel primary support structure are improved, control over large deformation of the soft rock single-track railway tunnel is achieved, and practicability is high.

Description

technical field [0001] The invention belongs to the technical field of construction of single-track railway tunnels, and in particular relates to a large deformation control method of soft rock single-track railway tunnels. Background technique [0002] The gravitational force of the earth and the inertial centrifugal force of the rotation cause the internal interaction of the rock mass medium, and the long-term geological tectonic movement influences the tectonic stress formed by the combination of multiple sets of complex effects such as plate transfer load and structural residual stress. The curvature of the side wall of the arch foot in the single-track railway tunnel "thin and high" section design form is small, which can ensure the safety of the primary support structure under the action of conventional stress, but when the surrounding rock is weak and contains high compressive structural stress, the support The structure is prone to deflection and deformation, and wea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21F17/00G06F30/13G06F30/23
CPCE21D9/00E21F17/00G06F30/13G06F30/23
Inventor 李东锋刘千里王建军杨茂杰任强谭忠盛刘普文王建魁杨旸李松涛
Owner SINOHYRDO ENG BUREAU 3 CO LTD
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