A Tunnel Model Test Device Realizing Advanced Detection of Multiple Geophysical Fields

Abstract

The invention discloses a tunnel model test device for achieving advanced detection of multiple geophysical fields. The tunnel model test device comprises a tunnel model cavity and a tunnel model face, wherein the tunnel model cavity is divided into an inner layer and an outer layer. The inner layer comprises a casing and a first reinforcement element positioned in the casing and used for restricting radial deformation of the casing, and the outer layer is provided with a second reinforcement element for restricting radial and axial deformation of the tunnel model cavity. Electrode installation holes, an electromagnetic coil support, in-well radar detection holes and transient electromagnetic advanced probe installation holes are formed in and arranged on the tunnel model face. The large-scale advance geology forecast tunnel model test device is provided for allowing advance forecasters to carry out multiple geophysical instrument tests in a model, the model is formed by winding glass fiber reinforced polymer (GFRP) composite materials for one time and casted integrally, and therefore, the tunnel model test device is high in mechanical strength and good in electromagnetic wave transmission performance and is an ideal advance forecast geophysical instrument test platform.

Description

technical field [0001] The invention relates to the field of tunnel geophysical advanced prediction and model test technology, in particular to a tunnel model test device capable of realizing multi-geophysical field advanced detection. Background technique [0002] In recent years, more and more long tunnel (hole) projects have been built in the fields of transportation, hydropower, etc., and the geological conditions are becoming more and more complex. , Unforeseen engineering geological disasters often occur, such as water inrush, mud inrush, collapse, etc., which bring huge safety problems and economic losses to tunnel construction, and easily induce secondary geological disasters and ecological environment problems. Therefore, in order to reduce the risk of the above-mentioned accidents during tunnel construction, the most effective solution is to use geophysical advanced forecasting technology to detect the adverse geological conditions in front of the tunnel face in ad...

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Problems solved by technology

[0004] In order to better simulate the actual engineering situation, the traditional advanced tunnel geological prediction model test is to embed the tunnel model in the rock and soil mass, but there are obvious weaknesses in the current tunnel model test device: The detection space is narrow, and the existing geophysical detection equipment is generally large in size, which makes it impossible for personnel to carry equipment to arrange survey lines on the face of the tunnel model, and data collection is difficult; ②The device layout is single and the tunnel model is small Only the arrangement of a single geophysical detection device can be realized, such as the small-scale tunnel model of the induced polarization method, the full-space transient electromagnetic tunnel model, etc., and other geophysical methods cannot be used for detection and comparative verification, and the repeatability of the test is poor;③ In the selection of tunnel model materials, metal materials have high strength but have strong electromagnetic interference. Ordinary non-metallic materials can hardly bear the surrounding large rock and soil pressure, and manual construction is very difficult. Therefore, an ideal both Materials that can resist electromagnetic interference and withstand large external pressures are used to make tunnel models

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