Tunnel construction large-scale integrated geophysics advanced detection model test device

Abstract

The invention discloses a tunnel construction large-scale integrated geophysics advanced detection model test device, which comprises tunnel surrounding rock, a main tunnel model, a model test case, a water-containing geological structure device, a numerical control automation construction device and a main control chamber. The model test device is a large-scale integral geophysics advanced detection model test device meeting the detection of a seismic wave method, an electromagnetic method and a direct current power method, the geophysics advanced detection model test device can be utilized for studying the geophysics response characteristics of the water-containing geological structure device in front of a tunnel face, in addition, various geophysics advanced detection forward and inversion methods of the water-containing geological structure device are verified, the relationship between some geophysics detection method results and the water inflow is studied, and the test foundation is laid for the water inflow prediction and the advanced prediction of the water-containing geological construction device in actual engineering.

Description

technical field [0001] The invention relates to a geophysical advanced detection model test device, in particular to a large-scale comprehensive geophysical advanced detection model test device for tunnel construction. Background technique [0002] In the 21st century, infrastructure construction around the world ushered in the climax of the development of "underground space". As the main structural form of underground engineering, the scale and number of tunnel construction are increasing. Tunnels are mainly divided into highway and railway traffic tunnels, water conservancy water transfer tunnels, municipal pipeline tunnels, mine tunnels, etc. For tunnel projects built under complex geological conditions, due to the difficulty in finding out the geological conditions of the line area in the early stage of geological survey, geological disasters such as water and mud inrush, tower defense, and large deformation often occur during construction, seriously affecting the constr...

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Problems solved by technology

[0006] From the perspective of the current development of model tests, the existing model tests have limitations such as single detection means, small scale and scale, single simulated geological type, and non-repeatable materials. ", Zhao Jiafu, Journal of Jilin University, the model test device in the article is only for the seismic method, and the model is composed of an 80cm×20cm×0.3cm plexiglass plate and a water tank, the scale is too small; the literature "Tunnel full space transient Physical Simulation of Electromagnetic Response", Qi Taiyue, Modern Tunnel Technology, the model test in this paper is only for the transient electromagnetic method, the model size is 4m×2m×1.5m, and its internal materials are fixed, which can simulate a single geological type

[0007] According to the investigation of existing technologies, we believe that the main problems faced by the physical simulation technology and equipment of comprehensive advanced geological prediction for tunnel construction are as follows: ① Due to the need to realize the similarity of the three detection methods of seismic wave method, electromagnetic method and direct current method Physical simulation, the similarity principles of each detection method are different from each other, and the parameter requirements for test materials are also different from each other, it is difficult to find a similar material that can satisfy the three detection methods at the same time; ② In order to truly simulate the actual geological conditions and detection environment, and can meet the boundary requirements of seismic wave field, electromagnetic field and DC electric field propagation, the size and scale scale of the physical model test device is required to be large; Classified studies on the geophysical response and detection and identification effects of typical water-bearing geological structures require that different types of water-bearing geological structures can be simulated in physical model tests; ④ Due to the high cost of physical model tests, if only a single geological situation can be simulated, Geological anomalies and similar materials cannot be replaced and reused, which greatly increases the cost of research. Therefore, it is required to realize the rapid arrangement of different types of anomalous bodies to simulate different geological conditions; The design of detection means, however, geophysical detection has the characteristics of multiple solutions and the complexity of the detection environment, so the physical test device is required to have multiple detection methods such as seismic wave method, electromagnetic method and direct current method, and the results of these detection methods are compared and verified. However, how to arrange the observation systems of various detection methods in the physical model without interfering with each other is a difficult problem

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