Working well-free heading machine synchronous grouting simulation test platform

Abstract

The invention discloses a working well-free heading machine synchronous grouting simulation test platform, comprising a large sunken type comprehensive test bench, a simulative duct piece, a simulative shield tail, a connection flange, a cross beam, a round tunnel portal, a hydraulic cylinder, a grouting pump, an earth pressure cell and a ground surface displacement meter. The large sunken comprehensive test bench comprises a starting well, a filling well and a receiving well; the simulative duct piece and the simulative shield tail are mounted in the filling well and covered with soil of different depth, the right end of the simulative duct piece is fixed with the well wall of the receiving well through the connection flange, the hydraulic cylinder is fixed on the inner wall of the leftmost end of the simulative duct piece, the simulative shield tail is sleeved on the periphery of the simulative duct piece and can slide axially along the outer wall of the simulative duct piece, the simulative shield tail is provided with a grouting pipeline and a grouting hole connected with the grouting pipeline, the cross beam is fixed on the leftmost end of the simulative shield tail, the grouting pump is connected with the grouting pipeline, the earth pressure cell is arranged in the duct wall of the simulative duct piece and the soil, and the ground surface displacement meter is arranged on the surface of the soil body. The working well-free heading machine synchronous grouting simulation test platform can simulate the whole process of synchronous grouting of the working well-free shield machines under different earth.

Description

technical field [0001] The invention relates to a simulation test device for the construction of a shield tunneling machine without a working well, in particular to a synchronous grouting simulation test platform for a shield tunneling machine without a working well, belonging to the technical field of tunnel construction engineering. Background technique [0002] There are many ways to study the construction technology of underground tunnels, such as theoretical analysis, etc., and the test method is also a very important scientific method. The characteristics of the body and the interaction relationship between the soil and the machine. At present, some enterprises, scientific research institutions and universities at home and abroad have established relevant laboratories to design and build corresponding simulation test benches to carry out this specific engineering simulation test. For example, Shanghai Tunnel Engineering Co., Ltd. has developed a large-scale shield tunn...

AI Technical Summary

Problems solved by technology

[0006] 1. The grouting simulation device can only simulate the synchronous grouting process of a single covering soil of the soil, but cannot simulate the grouting process under different covering soils when the shield tunneling machine without a working well enters the soil layer and pushes out the soil layer

[0007] 2. The soil surface displacement cannot be monitored - the grouting simulation equipment is only equipped with an earth pressure sensor, without a surface displacement meter, and cannot measure the soil surface displacement

[0008] 3. The real slurry cannot be used for the test - the shield tail gap has been reduced by the simulation ratio, and the real slurry cannot be used for the test if the gap is too small

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