Fault-passing tunnel excavation simulating experimental device

A simulation experiment device and tunnel excavation technology, which is applied in the field of tunnel testing, can solve the problems of inability to precisely control variables, fault thickness, fault dip angle and the angle between the fault and the tunnel axis, and it is difficult to flexibly adapt to the actual geological conditions of the project.
CN107328898AActive Publication Date: 2017-11-07CHINA MERCHANTS CHONGQING COMM RES & DESIGN INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA MERCHANTS CHONGQING COMM RES & DESIGN INST
Publication Date
2017-11-07

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Abstract

The invention provides a fault-passing tunnel excavation simulating experimental device. Short steel plates hinged in pairs are used for simulating nonuniform surrounding rock pressure caused by bulk density difference or elevation difference of a surrounding rock. The hinged short steel plates can transfer a shearing force but not transfer a bending moment, so that the possibility of producing shearing damage due to sudden pressure change is avoided while the nonuniform surrounding rock pressure is simulated; through a gauze, the thickness and the dip angle of a fault can be flexibly controlled, so that an actual fault model is accorded better, and especially in a loose and soft fault, the simulating effect is more obvious; horseshoe-shaped soft rubber pads at the two ends of a tunnel lining model not only can prevent a surrounding rock material from entering the tunnel, but also can prevent occurrence of a phenomenon that the tunnel lining model is damaged or tempered glass is cracked due to concentrated stress caused by direct contact between a tunnel structure and the tempered glass on the front and back sides under the action of a pressure. The fault-passing tunnel excavation simulating experimental device can research quantitative influence of the geological fault on the tunnel by controlling a single variable.
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Description

technical field

[0001] The invention relates to the technical field of tunnel tests, in particular to an excavation simulation experiment device for tunnels crossing faults. Background technique

[0002] When tunnels cross faults, engineering problems such as landslides, large deformations, and water and mud inrush are prone to occur, which will greatly increase the difficulty and cost of the project, and even cause safety accidents. Carrying out model tests to study construction mechanics, surrounding rock failure law and surrounding rock stability of fault fracture zone can effectively prevent or deal with such disasters.

[0003] In the prior art, the application number 201610004012.0 applied by Southwest Jiaotong University in 2016 is a displacement synchronization control device and test method for simulating tunnels crossing active faults. It discloses that the device is composed of a model test box without a cover. The box is composed of a fixed right half box. The l...

Claims

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