Tester for testing discount rule of water pressure of grouting circle of anti-water pressure emission-limit tunnel

Abstract

The invention relates to a tester for testing a discount rule of a water pressure of a grouting circle of an anti-water pressure emission-limit tunnel, comprising a pressure chamber, a simulation tunnel, pressurized equipment and measurement equipment, wherein the pressurized equipment comprises a nitrogen cylinder, a control valve, a pressure regulating valve, a switch, a water tank and an air-water exchange tank; the pressure chamber is a cylindrical container, comprising a switch, a flange plate, a support and a pressure chamber sleeve; the pressurized equipment utilizes the nitrogen cylinder combining with the air-water exchange tank for pressurization to provide a stable osmotic pressure for the pressure chamber; the simulation tunnel, a simulation grouting material and stimulation wall rock are placed in the pressure chamber; the diameter of the grouting material can be converted according to test requirements and geometric similarity; and the simulation tunnel can be precasted into be of different shapes and sizes according to the test requirements and geometric similarity. The measurement equipment can realize accurate measurement on pressure and flow rate. The tester can be used for researching the discount rule of hydraulic pressure of the grouting circle of the anti-water pressure emission-limit tunnel.

Description

technical field [0001] The invention belongs to the field of tunnels and underground engineering, and in particular relates to a test device for testing the water pressure reduction law of the grouting circle of a tunnel with limited drainage and water pressure resistance. Background technique [0002] In the construction of tunnels in high water level and rich water areas, grouting reinforcement rings (advance long conduit pre-grouting or advanced flat guide pre-grouting) are often used instead of linings to bear the external water pressure, and the water pressure distribution of grouting reinforcement rings under different conditions is studied. And its reduction law is the premise and foundation of the design of water pressure resistant tunnel. Water pressure-resistant tunnels are often located in mountainous areas with complex geological conditions, and a large number of on-site tests and tests cannot be carried out in the engineering design stage. Model tests are one of...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a test device for testing the water pressure reduction law of the grouting ring of the limited row anti-water pressure tunnel, which is used to solve the problem of determining the water pressure reduction law of the grouting ring of the limited row anti-water pressure tunnel through indoor tests

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