Structure residual bearing capacity measuring method and system based on tunnel lining deformation features

A tunnel structure and measurement system technology, applied in the direction of applying stable tension/pressure to test material strength, measuring devices, strength characteristics, etc., can solve problems such as irrationality, lack of tunnel safety state diagnosis methods, and error handling, etc. combined with high accuracy

Active Publication Date: 2019-08-16
TONGJI UNIV +1
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Problems solved by technology

Practice has shown that formulating plans and countermeasures based on experience alone is not enough. The lack of a systematic and scientific diagnosis method for tunnel safety status may lead to unreasonable or even wrong disposal, resulting in unnecessary waste

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  • Structure residual bearing capacity measuring method and system based on tunnel lining deformation features
  • Structure residual bearing capacity measuring method and system based on tunnel lining deformation features
  • Structure residual bearing capacity measuring method and system based on tunnel lining deformation features

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Embodiment Construction

[0043] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0044] This embodiment provides a method for determining the residual bearing capacity of a structure based on the deformation characteristics of the tunnel lining, which is applicable to various highway tunnel sections built in IV-VI surrounding rock sections, including the following steps:

[0045] 1) According to the actual tunnel structure, the lining model is made by setting the similarity ratio, which includes geometry, strength, elastic modulus, strain, displacement, surface force, physical force, force, bending moment, formation resistance coefficient and reinforcement ratio s...

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Abstract

The invention relates to a structure residual bearing capacity measuring method and system based on tunnel lining deformation features. The method comprises the following steps: 1) according to an actual tunnel structure, manufacturing a lining model according to a set similarity ratio; 2) carrying out loading test on the lining model and recording structural deformation and corresponding load ofthe lining model; 3) obtaining the structural deformation and the corresponding load of the corresponding actual tunnel structure according to the similarity ratio, and obtaining a deformation load function relation of the actual tunnel structure by adopting a data fitting mode; and 4) measuring to obtain current convergence deformation of the actual tunnel structure, and measuring the residual bearing capacity of the actual tunnel structure on the basis of the deformation load function relation. Compared with the prior art, the residual bearing capacity of the structure can be quantitativelyjudged according to engineering monitored data and is used as a structural safety evaluation basis; and meanwhile, the stress damage characteristic and the damage mode of the structure can be furtherrevealed through model test.

Description

technical field [0001] The invention relates to the technical field of tunnel safety monitoring, in particular to a method and system for measuring residual bearing capacity of structures based on deformation characteristics of tunnel lining. Background technique [0002] During the long-term operation of the tunnel structure, structural problems such as cracking and excessive deformation may occur, which will affect the performance of the tunnel. Especially under the condition of broken surrounding rock, the tunnel is prone to large deformation, which may damage the supporting structure, intrude into the building boundary, endanger the structure and traffic safety, and even lead to landslides in severe cases, causing serious consequences. In actual engineering, engineers generally combine the general characteristics of tunnel convergence deformation and the geology, climate, hydrology and other information of the tunnel location, and formulate treatment countermeasures and ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/02G01N3/12
CPCG01N3/02G01N3/12
Inventor 刘学增丁爽桑运龙师刚
Owner TONGJI UNIV
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