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An indoor test device for accurately simulating the stress state of the tunnel bottom structure

A technology of bottom structure and stress state, which is applied in the field of tunnel structure laboratory test, can solve the problem of not being able to simulate the actual stress state of the tunnel bottom structure well, and achieve the effect of small economic cost

Active Publication Date: 2018-07-24
CENT SOUTH UNIV
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Problems solved by technology

[0006] In order to solve the technical problem that the existing tunnel overall test device and component test device cannot simulate the actual stress state of the tunnel bottom structure well, the present invention provides a tunnel bottom structure that can accurately simulate the stress boundary of the tunnel bottom structure Indoor test device for accurate simulation of force state

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  • An indoor test device for accurately simulating the stress state of the tunnel bottom structure
  • An indoor test device for accurately simulating the stress state of the tunnel bottom structure
  • An indoor test device for accurately simulating the stress state of the tunnel bottom structure

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Embodiment Construction

[0027] The invention consists of a model box body, an axial force component, a lateral restraint component and a formation resistance component. The axial force components are symmetrically arranged on both axial sides of the test specimen; the lateral restraint components are symmetrically arranged on both lateral sides of the test specimen; Simulate different stress states such as axial compression, eccentric compression, and lateral constraints. The formation resistance component is composed of the filling material at the bottom of the test piece and the jack components arranged on both sides of the upper part of the filling material; the pressure of surrounding rock at different buried depths can be simulated by applying different pressures of the jack; by filling different materials at the bottom of the test piece, it can simulate The actual situation of the surrounding rock at the bottom of the tunnel is rich in water, softened or partially voided. By loading the extern...

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Abstract

The invention discloses a tunnel-bottom-structure stress-state accurate-simulation indoor test apparatus. The apparatus is formed by a model box body, an axial force component, a lateral restraint component and a formation resistance component. According to a stress state of a tunnel bottom structure, various kinds of forms of actual mechanical boundary conditions are applied and actual conditions of a tunnel bottom, which are surrounding rock rich water, uneven softening, local void and the like, are simulated, wherein the actual mechanical boundary conditions include axial compression, eccentric compression, lateral restraint, surrounding rock pressure and the like. A static force or power loading system is linked so as to conveniently apply an outer load. In addition, according to an actual condition and a demand, each component can be conveniently arranged and adjusted. By using the test apparatus, a bottom constraint applying problem generated when an existing test apparatus cannot consider that the tunnel bottom generates softening, void and other uneven situations is solved; and accurate test simulation to a tunnel bottom structure stress state is realized.

Description

technical field [0001] The invention relates to the technical field of indoor testing of tunnel structures, in particular to an indoor testing device for accurately simulating the stressed state of a tunnel bottom structure. Background technique [0002] With the development of China's economy and the advancement of tunnel engineering technology, various tunnel engineering structures are increasing. Due to the complex rock and soil conditions in which the tunnel is located, the surrounding environment is sensitive, and the use conditions are harsh, the performance of the structure itself has been continuously degraded under the long-term action of multiple factors. Some tunnels have bottom structure damage, mud and mud, etc., which seriously affect the performance of the tunnel. Operational security. The importance of the tunnel bottom structure test as a main method to study the mechanical characteristics, performance evolution law and failure mode of the tunnel bottom str...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M99/00
CPCG01M99/007
Inventor 施成华叶艺超彭立敏雷明锋杨伟超
Owner CENT SOUTH UNIV
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