Three-dimensional model testing system and method of tunnel water outburst and mud outburst and grouting treatment

Abstract

The invention discloses a three-dimensional model testing system of tunnel water outburst and mud outburst and grouting treatment. The three-dimensional model testing system comprises a test bench, a ground stress loading system, a water supply system, a grouting system and a monitoring system, wherein a space filled with a dense medium, a fault medium and a surrounding rock medium is formed in the test bench, the dense medium is located on the periphery and the bottom of the internal space of the test bench, the fault medium and the surrounding rock medium are located in a concave space formed by the dense medium, the fault medium is located at the middle part of the surrounding rock medium, the water supply system is arranged on a gravel filter layer at the top of the fault medium, the ground stress loading system is located on the top of the surrounding rock medium, the grouting system stretches to a tunneling position in the surrounding rock medium from the bottom of the test bench, the monitoring system comprises a plurality of sensors which are arranged at the boundary of the fault medium and the surrounding rock medium and in the fault medium and are connected with an external display device of the test bench. The invention further discloses a testing method using the system.

Description

technical field [0001] The invention relates to a geotechnical engineering model test system and a test method thereof, in particular to a three-dimensional model test system and a test method thereof for tunnel water and mud inrush and grouting treatment. Background technique [0002] When tunnels are excavated in water-rich and weak fault zones, water and mud inrush disasters often 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. However, due to the complexity of rock mass hydrogeological conditions, the concealment of grouting engineering, and the time-varying properties of grout, the theory of grouting seriously lags behind the practice of grouting engineering. [0003] Model test is an important method to study the catastrophe mechanism in the formation process of...

AI Technical Summary

Problems solved by technology

At present, in terms of grouting model experiments, most of the grouting model experiments focus on the local part of the grouting process, only for some specific formations (such as single fractures, simple porous media), and there is no overall systemic research on the grouting process; In terms of water and mud inrush model tests, most researchers only study the disaster-causing process of water and mud inrush, and have not studied the post-disaster treatment

Especially in the model test research on the water and mud inrush disaster caused by tunnel excavation and the grouting treatment after the disaster, there are few domestic researches.

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