Tunnel model surrounding rock internal displacement monitoring test platform

Abstract

The invention discloses a tunnel model surrounding rock internal displacement monitoring test platform which comprises a box body, a soil body, a tunnel dynamic excavation model, a vault displacementmonitoring device and a side wall radial displacement monitoring device. The soil body, the tunnel dynamic excavation model, the vault displacement monitoring device and the side wall radial displacement monitoring device are all arranged in the box body, and the tunnel dynamic excavation model is arranged in the soil body in the box body; the vault displacement monitoring device and the side wallradial displacement monitoring device are both rod piece devices and are vertically embedded in the soil body, the upper portions of the rod piece devices are exposed out of the surface of the soil body, the bottom of the vault displacement monitoring device is close to the top of the tunnel dynamic excavation model, and the side measuring points of the side wall radial displacement monitoring device are close to the side wall of the tunnel dynamic excavation model. The tunnel model surrounding rock internal displacement monitoring test platform has the advantages of being simple in structureand lower in cost and being easy and convenient to operate, and can simulate the change conditions of the vault and side wall displacement of a certain section in the tunnel excavation process and after excavation.

Description

technical field [0001] The invention relates to the technical field of underground engineering tests, in particular to a tunnel model test vault side wall radial displacement monitoring device. Background technique [0002] In the research of tunnel engineering, model tests are often used to predict the radial displacement during tunnel excavation, to analyze the stability of the tunnel, and to evaluate the safety state of the tunnel construction. During the test, total station, camera, DSCM and other methods can be used to monitor the surface deformation of the surrounding rock. However, the surface deformation of the model is greatly affected by the boundary. Therefore, it is necessary to monitor the internal displacement of the surrounding rock. At present, the available internal displacement monitoring devices for surrounding rock include optical fiber displacement sensors and mechanical miniature multi-point displacement meters, but the data acquisition equipment of the...

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Problems solved by technology

[0003] The purpose of this application is to overcome the deficiencies in the prior art, provide a tunnel model surrounding rock internal displacement monitoring test platform, and design tunnel model test vaults, side wall radial displacement monitoring devices to solve the problems encountered during tunnel excavation. The problem of monitoring the deformation of the vault and side wall

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