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Method of Determining Landslide Thrust Based on Tunnel Lining Deformation

A technology of tunneling and thrusting, which is applied in electrical digital data processing, design optimization/simulation, instruments, etc., and can solve problems such as failure to consider the self-supporting capacity of surrounding rocks, the interaction of surrounding rocks, and unsuitable tunnels.

Active Publication Date: 2020-06-16
CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
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Problems solved by technology

[0004] Tunnel lining calculations are mainly divided into load-structure method and strata-structure method. The former does not consider the self-supporting capacity of surrounding rock and the interaction between support system and surrounding rock. It is considered that surrounding rock has nothing to do with load and support stiffness, so it is conservative. ; while the key of stratum-structure method is to determine the stress release of surrounding rock and the interaction of stratum structure, so it is not suitable for tunnels in the process of stress redistribution of surrounding rock after excavation.

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  • Method of Determining Landslide Thrust Based on Tunnel Lining Deformation

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[0026] The present invention will be further described below in conjunction with drawings and embodiments.

[0027] The present invention determines the method for landslide thrust according to tunnel lining deformation, comprises the following steps:

[0028] Step 1. Obtain tunnel deformation

[0029] Due to the thrust of the upper slope sliding in the tunnel, there are different degrees of extrusion, shearing and other phenomena. Therefore, three-dimensional laser scanning technology is used to obtain the point cloud data of the deformed tunnel, and then the section view of the tunnel is cut in sections, combined with the complete size data of the tunnel before deformation, the accurate deformation value of the tunnel is obtained through comparative analysis. Specifically, 3D laser scanning was performed with a Leica ScanStation 2 scanner.

[0030] In addition, it can also be supplemented with UAV aerial surveys to quickly obtain high-precision topographic maps of slopes. ...

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Abstract

The invention discloses a method for determining landslide thrust according to tunnel lining deformation and relates to the field of tunnel and landslide engineering. The method for determining the size of landslide thrust, mastering characteristics and scales of landslide and providing guidance for prevention cure schemes according to tunnel lining deformation. The technical scheme is that the method includes: acquiring exact deformation of different sections of a tunnel through reasonable monitoring means; then, calculating permanent load of a tunnel structure; under the conditions that surrounding rock pressure is considered, converting the load into equivalent nodal force by combining with an ANSYS finite element analysis method, performing repeated iterative calculation by adopting atrial calculation method and determining landslide thrust borne by different deformation parts in an inversion manner. With the method, a tunnel transformation mechanism and a landslide interaction mechanism with the same are favorably analyzed, and technical support is provided for engineering measures such as prevention and control and tunnel deformation support of landslide.

Description

technical field [0001] The invention relates to the field of tunnel and landslide engineering, in particular to a method for determining landslide thrust according to tunnel lining deformation. Background technique [0002] When building roads and railway tunnels in mountainous areas, it is often encountered that the tunnel passes through the body of the landslide and its surroundings. This type of tunnel will be deformed and cracked due to the sliding force of the slope, which has brought great harm to the project construction. troubled. At present, scholars at home and abroad have established the concept of "tunnel-landslide system", which generally refers to various tunnel projects constructed and operated within the landslide body and its surrounding areas and the geological hazards in the area. The main intention of establishing this concept is to consider not only the respective deformation development characteristics of tunnels and landslides, but also the interactio...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F119/14
Inventor 魏恺泓张世殊彭仕雄冉从彦魏小佳裴向军
Owner CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
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