Test bed device for tunnel excavating and grouting model and application method of device

Abstract

The invention discloses a test bed device for a tunnel excavating and grouting model and an application method of the device. The test bed device comprises a lateral wall, a head cover for providing and loading a crustal stress platform, and a bottom plate arranged at the top of a reinforced concrete support rack, wherein the lateral wall vertically stands on the bottom plate and is connected with the bottom plate; the head cover is arranged at the top of the lateral wall and connected with the lateral wall; the lateral wall is formed by a plurality of model ring units which are stacked together in the vertical direction and sequentially connected; two round holes are formed in tunnel design positions in the diameter directions corresponding to the model ring units; the round holes are plugged by using arc sealing steel plates which are the same as the lateral wall in radian before tunnel excavation; holes are formed in the positions at four corners of the arc sealing steel plates; the arc sealing steel plates are connected with the lateral wall. By adopting the device, the geological disaster generation process and the later grouting reinforcing process in the tunnel excavation process can be continuously and systematically simulated, and the device has the advantages of being high in strength, and convenient to assemble and dismantle by adopting a modular assembling mode.

Description

[0001] technical field [0002] The invention relates to a geotechnical engineering model test bench device, in particular to a tunnel excavation and grouting model test bench device and a use method. Background technique [0003] During the excavation of tunnel engineering, problems such as large deformation of surrounding rock and large amount of water inflow often occur, and even water and mud inrush disasters may occur, causing huge loss of personnel and property. Grouting, as an effective method to strengthen weak surrounding rock and control water and mud inrush disasters, has been more and more widely used in tunnel water and mud inrush disaster control projects. Model test is an important method to study the catastrophe mechanism in the formation process of tunnel water and mud inrush disaster, the law of grout diffusion in the process of grouting treatment and the reinforcement mechanism. However, there are currently few model test benches for tunnel excavation and...

AI Technical Summary

Problems solved by technology

[0005] The current test devices either only simulate the tunnel excavation process or only the grouting process, and there is no model test device that can realize the continuous system simulation of the geological disaster occurrence process during the tunnel excavation process and the subsequent grouting reinforcement process

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