Model tunnel test device and test method capable of respectively controlling water pressure and soil pressure

Abstract

The invention provides a model tunnel test device and a test method capable of respectively controlling water pressure and soil pressure, belongs to the technical field of tunnel model tests, and aims at respectively and independently controlling the water pressure and the soil pressure in a test. The device comprises a rock-soil triaxial test system and a tunnel model test box, the rock-soil triaxial test system comprises a loading frame, a water injection pump, a pressure volume controller and a master control computer, the tunnel model test box comprises a box cover and a box body which are in sealed connection, the upper layer of the box body comprises a piston assembly, the lower layer of the box body comprises a simulated stratum, and a tunnel model is arranged in the simulated stratum; laying a pore loading plate on the simulated stratum; the piston assembly comprises an upper-section loading piston, a lower-section loading piston and a balance cylinder, the upper-section loading piston and the lower-section loading piston are arranged in a matched mode, the upper-section loading piston penetrates through a through hole of the box cover to be connected with the load sensor, and the lower end of the lower-section loading piston is connected with the pore loading plate; the water injection pump and the pressure volume controller are connected with a water pressure loading hole in the bottom of the box body through a hydraulic pipeline; and the master control computer is electrically connected with the pressure volume controller and the loading frame.

Description

technical field [0001] The invention relates to the technical field of tunnel model tests, in particular to a model tunnel test device and a test method with respectively controllable water and soil pressures. Background technique [0002] In order to speed up the construction of the underground transportation system, the number of tunnels in my country has developed in a blowout manner, and the operating mileage has exceeded 20,000 kilometers. One of the main tasks of tunnel engineering is to ensure the safety and stability of the constructed tunnel structure, that is, the tunnel structure can resist the surrounding water and soil pressure within the allowable deformation range, which requires the study of the mechanical response of the tunnel under the combined action of water and soil pressure . The water and soil pressure on a tunnel during its operating life often changes. Taking an urban underground traffic tunnel as an example, the water pressure and soil pressure on...

AI Technical Summary

Problems solved by technology

However, for the independent control of water and soil pressure with more complex loading conditions, there is no mature model test device at present.

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