System and method for tunnel water-bursting test under high crustal stress-osmotic pressure

Abstract

The invention relates to a system and method for tunnel water-bursting test under high crustal stress-osmotic pressure. The system comprises a main box used for simulating excavation of a tunnel model, the main box is of integrated structure and placed on a base, two opposite sides of the base are fixed on two slide rails, and an n-shaped counter-force frame is arranged between the two slide rails. The bottom ends of two support legs of the counter-force frame are fixed detachably on the slide rails. The top beam of the counter-force frame is fixedly connected with the top end of a loading system. An information monitoring element is arranged in the main box, the loading system and the information monitoring element are connected with a monitoring and controlling system. The monitoring and controlling system controls the loading system to apply crustal stress and osmotic pressure to the model material in the main box.Research on tunnel water bursting under the condition of high crustal stress-osmotic pressure engineering excavation turbulence is realized, and actual needs of the engineering are met.Further, fully automatic control of operation is realized and experiment operation is greatly facilitated.

Description

technical field [0001] The invention relates to a model test system and method for tunnel water inrush under high ground stress-high seepage pressure. Background technique [0002] In recent years, my country has built a large number of major infrastructure projects such as water conservancy and hydropower projects, railway and highway traffic projects, which has greatly promoted the construction of tunnel projects. As the focus of water conservancy, hydropower and transportation engineering construction shifts to the western mountainous areas and karst areas with extremely complex terrain and geological conditions, more than 20 world-class large-scale water conservancy and hydropower projects and tens of thousands of kilometers of traffic tunnel projects are under construction or will soon be put into construction. A batch of deep tunnel projects with notable characteristics such as "large buried depth, high stress, strong karst, high water pressure, complex structure, and ...

AI Technical Summary

Problems solved by technology

For this assembled structure, the test requirements for high ground stress-high osmotic pressure simulation cannot be realized

[0007] 2. The rigidity of the reaction frame is low, and the overall performance is not good. Moreover, the loading system and the reaction frame are connected through connectors, and the connection relationship is complicated, which is not conducive to evenly arranging multiple hydraulic jacks. Avoid uneven loading

[0008] 3. The structure of the test device is complicated, and the assembly and disassembly process of the test device is cumbersome. Each test needs to use a crane to install a jack and a reaction frame, which is inconvenient for the test

However, the current test device simplifies the shape of the opening to a specific shape when simulating tunnel excavation, and the same test device cannot perform repeated tests on tunnels with different cross-sectional shapes, resulting in waste of resources

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