Muddy water balance control test system of muddy water balance shield machine comprehensive simulation test table

Abstract

The invention discloses a muddy water balance control test system of a muddy water balance shield machine comprehensive simulation test table. A muddy water loading device is mounted on a muddy waterpressurizing cylinder body, the muddy water pressurizing cylinder body communicates with a simulated shield machine front shield machine body, and a muddy water bin and an air cushion bin are formed.A sealing cutter disc is mounted on the muddy water pressurizing cylinder body, and a hydraulic motor drives a main driving gear box to work to drive the sealing cutter disc to rotate. The muddy waterpressurizing cylinder body is provided with a mud feeding pipe, a muddy water slurry inlet pipeline and a muddy water slurry outlet pipeline are mounted on the simulated shield machine front shield machine body, and a residue mud adjusting groove is connected with the mud feeding pipe. The muddy water slurry outlet pipeline is connected with a muddy water separator through a multi-phase flow fluid power test pipeline, the muddy water separator is connected with the residue mud adjusting groove and connected with the muddy water adjusting groove, and the muddy water adjusting groove is connected with the muddy water slurry inlet pipeline. The simulated shield machine front shield machine body is provided with a compressed air pipeline. According to the muddy water balance control test system of the muddy water balance shield machine comprehensive simulation test table, the active factors and passive factors of muddy water bin pressure change in the muddy water balance shield machine construction process can be integrally simulated, and the muddy water balance control test system is used for scientific research of muddy water balance shield machine muddy water pressure balance control.

Description

technical field [0001] The invention relates to a mud-water balance control test system for a mud-water balance shield comprehensive simulation test bench, which is particularly suitable for simulating the mud-water pressure balance control of a mud-water balance shield machine mud tank, and can be used for scientific research and teaching training related to the mud-water balance shield. technical background [0002] Shield tunneling is a major equipment used in the construction of underground tunnels. It is generally divided into mud-water balance shields, earth pressure balance shields, and air pressure balance shields. The mud-water balance shield is suitable for sandy gravel and pebble formations with rich water content, and can effectively solve the problem of excavation surface stability. In the occasions where the overburden is shallow and the surface settlement is strictly controlled, the mud-water balance shield has outstanding advantages in precise control and has ...

AI Technical Summary

Problems solved by technology

On the one hand, the invention does not conform to the actual mud-water shield working process. The actual mud-water balance shield relies on the mud-water slurry discharge pipeline to discharge the soil excavated by the cutterhead instead of the screw conveyor; on the other hand, the invention cannot independently adjust the mud-water Inlet and discharge slurry flow, thereby simulating the actual mud-water pressure balance control operation; finally, the size of the simulation test system announced by the invention is too small to include a large number of complex systems of the actual mud-water shield. Although the earth box is used to simulate the geology, the earth box Unable to load, unable to truly simulate geological changes

Invented by Xu Qianwei of Tongji University and others, "Indoor Model Test Device and Application Method for Simulating Slurry-Water Balance Shield Construction" (CN 103437771A), uses circulation box, micro-pump, water inlet pipe, mud outlet pipe and pressure regulating pipe to form mud-water circulation system, the technology disclosed in this patent does not involve the influence of muddy water loading and geological changes on the muddy water tank pressure, nor does it involve the influence of the adjustment of the compressed air pressure of the air cushion cabin on the muddy water tank pressure, which has great limitations

The "dual-mode composite shield testing machine" (CN103050051B) invented by Jiao Qizhu and others of China Railway Fourth Survey and Design Institute Group Co., Ltd., its mud-water circulation system cannot completely simulate the mud-water tank pressure adjustment process of the actual shield, and does not have the loading function

[0008] In summary, the existing published research and invention results are very simplified for the mud-water balance shield mud tank pressure control simulation test system, and cannot completely simulate the active factors of mud tank pressure changes (air cushion tank compressed air pressure changes, mud Liquid level changes, mud relative density changes) and passive factors (soil permeability changes, soil collapse, soil quality changes) cannot meet the needs of complete simulation of mud tank pressure change factors in mud water balance shield mud water pressure control scientific research activities, and have Certain limitations

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