Muddy water balance type shield simulation testing system

Abstract

The invention relates to a muddy water balance type shield simulation testing system. In the structure of the system, a model box for holding soil is fixed on a base; a refrigeration freezing device is communicated with a freezing pipe in the model box; the front part of a shield machine enters the model box through a guide sleeve on the side of the model box; a cutter disk at the front part of the shield machine is connected with the output shaft of a gearbox of a hydraulic power system through a main shaft; jacks at the left and right sides of the shield machine are connected between the model box and the gearbox; a space between a partition plate behind the cutter disk of the shield machine and the cutter disk forms a muddy water cabin; and an injection pipe of a muddy water pot, whichis connected with an air pressure boosting device, penetrates into the shield machine from the tail part of the shell of the shield machine. The system provided by the invention can simulate the tunneling process of the muddy water shield machine in a submerged tunnel construction with high water pressure and can synchronously record soil pressure, water pressure, displacement and the tunneling parameters of the shield machine, thereby finding out and analyzing the mechanism and conditions of muddy water pressure balance country rock and providing more reliable experiment basis for submerged tunnel construction and the design of a muddy water shield machine.

Description

technical field [0001] The invention relates to a mud-water balance type shield simulation test system. Background technique [0002] The proportion of underwater tunnel structure in my country's transportation field will become larger and larger, and mud-water balance shield machine is the main equipment for underwater tunnel shield construction. When the mud shield machine is constructing an underwater tunnel, a mud film with a specific pressure and concentration is formed in the mud tank to form a mud film on the excavation surface of the cutter head, and the pressure difference between the front and back of the excavation face is kept within the set range , so that the shield machine can excavate smoothly in the underwater environment of high water pressure, and the balance mechanism of cutting mud film on the excavation surface of the cutterhead has an important influence on the stability of the excavation surface and the dynamic excavation process. By simulating the e...

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Problems solved by technology

[0003] At present, the more representative shield test equipment at home and abroad are: the miniature mud-water balance shield machine simulation test device developed by Waseda University, using this miniature test device to study the tunneling mechanism of the early mud-water balance shield machine , but the simulation of the mud-water balance shield machine is too simple, and many conditions cannot be set, especially for the tunneling process and balance mechanism of the mud-water shield machine under the condition of high water pressure (100 meters of water head), it is difficult to study

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