Device and method for testing thickness of outburst prevention layer for water inrush of tunnel

Abstract

The invention discloses a device and a method for testing the thickness of an outburst prevention layer for water inrush of a tunnel. The device comprises an underground water simulation device, a tunnel model, a simulated surrounding rock test box, a sensor, a data acquisition device, and a water and mud collection device; the underground water simulation device comprises a water source tank, a water pump, a water pipe and a gathered pressure water tank which are sequentially connected with one another; the gathered pressure water tank is connected with one end of the tunnel model, the otherend of the tunnel model is connected with the simulated surrounding rock test box, a plurality of partition plates, a stress detection unit and a simulated surrounding rock prepared from a similar simulating material are arranged in the simulated surrounding rock test box, the stress detection unit monitors and simulates the stress, the strain and the seepage parameter of the simulated surroundingrock, and the simulated surrounding rock breaks to simulate the water inrush when the pressure of the gathered pressure water exceeds the loading limit of the simulated surrounding rock; the water and mud collection device collects the burst water and mud after the simulation of water inrush; the sensor and the data acquisition device acquire the pressure and the flow of the supplied water flow.

Description

technical field [0001] The invention relates to a test device and method for the thickness of a tunnel water inrush prevention layer. Background technique [0002] my country's karst areas have a vast territory and complex groundwater environment. With the development of railway tunnel construction in the direction of long, large, and deep, the construction of railway tunnels in these areas will cause water inrush from karst structures to be the most serious construction geological disaster caused by humans. The construction of long tunnels in karst areas often encounters problems such as rich water, high water pressure, underground rivers, karst caves, and faults. Excavation construction can easily induce large-scale water and mud inrush disasters; It will seriously damage the groundwater environment, change the groundwater seepage field and the relationship between replenishment and drainage, cause the reduction and depletion of groundwater resources, and lead to water pol...

AI Technical Summary

Problems solved by technology

The construction of long tunnels in karst areas often encounters problems such as rich water, high water pressure, underground rivers, karst caves, and faults. Excavation construction can easily induce large-scale water and mud inrush disasters; It will seriously damage the groundwater environment, change the groundwater seepage field and the relationship between replenishment and drainage, cause the reduction and depletion of groundwater resources, and lead to water pollution and destruction

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