Servo type composite earth pressure balance miniature shield device and working method

Abstract

The invention provides a servo type composite earth pressure balance miniature shield device and a working method, and relates to the field of tunneling simulation equipment. The servo type compositeearth pressure balance miniature shield device comprises a testing machine and a lifting mechanism matched with the testing machine, wherein a cutterhead of the testing machine is matched a pushing mechanism to obtain the soil pressure of a tunnel face in front of the cutterhead, and the cutterhead rotating speed, pushing speed and testing machine lifting are adjusted, and pressure balance betweenthe soil body in front of cutterhead and a soil pressure balance bin of the testing machine is maintained. The miniature shield device is arranged to simulate the actual construction processes of jacking, soil cutting, soil discharging and the like of the shield tunneling machine, and the operation, pushing speed and relative height of the cutterhead are adjusted to maintain the pressure balancebetween the soil in front of the cutterhead and the soil pressure balance bin of the testing machine, the purpose of reducing front-back pushing and up-down lifting resistance is achieved, and the device better adapts to different model soil bodies.

Description

Technical field[0001]The present disclosure relates to the field of tunneling simulation equipment, in particular to a servo-type composite earth pressure balance miniature shield device and a working method.Background technique[0002]The statements in this section merely provide background technology related to the present disclosure, and do not necessarily constitute prior art.[0003]With the rapid progress of urbanization in my country, a single ground transportation system can no longer meet the needs of urban development. Many cities have begun to take the development and utilization of underground space as an important measure to solve urban congestion, and the proportion of shield construction is increasing. Shield equipment integrates a number of key technologies including geological adaptability, cutter head, electro-hydraulic control, etc. It has the functions of excavating and cutting soil, conveying soil ballast, assembling tunnel lining, and measuring and guiding deviatio...

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Problems solved by technology

[0004] The inventors found that shield excavation has relatively strong pertinence. For different stratum conditions, different tunnel engineering designs and actual working performance, it is necessary to select the appropriate shield machine structure and performance parameters; the current mechanical and mathematical models are difficult to fully describe The excavation load of the excavation machine, the structural and mechanical parameters of the excavation process, and due to the high cost of the shield machine, the cost of the field test is high, the technical risk is high, and it is difficult to widely implement

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