Loading and unloading simulation test system for double-track tunnel excavation face
A double-lane tunnel, simulation test technology, applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, instruments, etc., can solve tunnel deformation damage, ground surface or ground structure damage, and damage to the surrounding soil balance state, etc. problem, achieve the effect of reducing friction, avoiding torsion and jamming, and facilitating adjustment
Active Publication Date: 2018-08-07
TIANJIN UNIV
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Problems solved by technology
New tunnels excavated in parallel adjacent to existing tunnels will destroy the balance of the surrounding soil, causing changes in the stress field and displacement field of the surrounding soil, causing surface settlement, surface or ground structure damage, and excessive tunnel deformation damage. risks of
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[0021] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:
[0022] see Figure 1 to Figure 8 , a double-track tunnel excavation face loading and unloading simulation test system, including a test tank 1, an existing tunnel model 2, a new tunnel model 3, a loading system and a data acquisition system.
[0023] The existing tunnel model 2 is a model tunnel pipe buried in the test tank 1, the transverse stiffness and longitudinal stiffness of the model tunnel pipe form a corresponding relationship with the tunnel passage similarity ratio in the actual project, and the model tunnel pipe The two ends of each are vertically fixed on the front side wall and the rear side wall of the test tank 1 respectively, and the model tunnel pipe is formed by a plurality of model tunnel rings 2-1 connected in series, eac...
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The invention discloses a double-track tunnel excavating face loading and unloading simulation test system. The double-track tunnel excavating face loading and unloading simulation test system comprises a testing tank, an existing tunnel model, a newly built tunnel model, a loading system and a data acquisition system, wherein the existing tunnel model is a modeled tunnel pipe embedded in the testing tank, the modeled tunnel pipe is formed by series connection of multiple modeled tunnel rings, and each modeled tunnel ring is formed by fixed connection of multiple modeled tunnel segments; the newly built tunnel model comprises an outer cylinder and a push cylinder embedded in the testing tank, and the push cylinder is arranged in the outer cylinder in a sliding fit mode; the newly built tunnel model is parallel and adjacent to the existing tunnel model. By the adoption of the double-track tunnel excavating face loading and unloading simulation test system, the interaction relation between movement of the excavating face, a shield tunneling machine and soil mass during advancing and retreating of the shield tunneling machine in practical situation is reproduced, and test basis is provided for analyzing the stress variation of surrounding soil mass, the pressure change of a tunnel and deformation of an existing tunnel during loading and unloading of the excavating face by simulating the stress condition of the existing tunnel under the circumstance through adjacent modeled tunnels.
Description
technical field [0001] The invention relates to the technical field of model tests, in particular to a simulation test system for loading and unloading the face of a double-line tunnel excavation, which is used for simulating and testing the loading and unloading of the face of a new tunnel when the shield method is excavating a double-line tunnel. The impact of unloading on the surrounding soil and existing tunnels. Background technique [0002] In recent years, with the rapid development of my country's urban infrastructure construction, underground rail transit has gradually become an important part of urban transportation due to its environmental protection, high efficiency and economic characteristics. In developed cities with complex underground rail transit systems, limited by objective conditions, they often face the problem of double-track tunnel excavation and construction, and the distance between adjacent tunnels is small. The new tunnel excavated in parallel ne...
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IPC IPC(8): G01N3/08G01N3/02
CPCG01N3/02G01N3/08G01N2203/0075
Inventor 郑刚范奇查万理张天奇
Owner TIANJIN UNIV
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