Indoor model test device capable of simulating slurry balance shield construction and use method thereof

Abstract

The invention relates to an indoor model test device capable of simulating slurry balance shield construction and a use method thereof. The indoor model test device comprises a digging propulsion mechanism, a circulation mechanism and a slurry injection mechanism, wherein the digging propulsion mechanism comprises an electric motor, a speed reducer, a shield shell, a main shaft and a rotary pipe, the circulation mechanism comprises a circulation tank, a micro water pump, a water inlet pipe, a mud outlet pipe and a pressure regulating pipe, and the slurry injection mechanism comprises a slurry injection tank, a slurry tank, a mini compressor, a pneumatic pressure tube, a slurry injection pipe and a slurry injection head. Compared with the prior art, the indoor model test device has the advantages that a whole construction process, such as dynamic digging propulsion, pipe sheet assembly and wall back grouting, of a slurry balance shield construction machine can be simulated, more accurate and real experimental data can be provided for the design of all parameters for actual shield tunneling construction, and the safety during actual construction is guaranteed.

Description

technical field [0001] The invention relates to a simulation test device for shield construction and a use method thereof, in particular to an indoor model test device capable of simulating mud-water balance shield construction and a use method thereof. Background technique [0002] With the rapid development of urban subway construction in my country, more and more shield tunnels pass through complex strata with uneven softness and hardness, and high-rise buildings. In order to minimize the impact of soil disturbance on the strata and buildings along the line To ensure the safety of construction, it is necessary to ensure the stability of the excavation surface of shield tunneling. [0003] The mud-water balance shield injects muddy water into the sealed compartment of the excavation face, and the muddy water is pressurized and external pressure is balanced to ensure the stability of the soil on the excavation face. However, the geotechnical engineering problems are complex ...

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Problems solved by technology

[0005] The above test devices are all tested by a circulation system composed of two mud tanks and a hydraulic jack. The simulation test is too simple, and it is difficult to study the influence of the cutter head opening ratio and the grouting pressure behind the wall on the tunneling process of the mud-water balance shield machine.

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