Shield type TBM step changing method

Abstract

The invention discloses a shield type TBM step changing method. The shield type TBM step changing method comprises the steps that whether gripper oil cylinders need to stretch out for step changing or not is judged, if yes, all the gripper oil cylinders are controlled to stretch out, so that the gripper strokes of all the gripper oil cylinders are equal to a stroke X<0> of a preset gripper oil cylinder stretching to the hole wall, and a lower gripper oil cylinder is restrained to synchronously move along with an upper gripper oil cylinder; and whether the gripper pressure of all the gripper oil cylinders is equal to the pressure F1 borne by the preset gripper oil cylinder when the preset gripper oil cylinder makes contact with the hole wall or not is judged, if yes, the constraint that the lower gripper oil cylinder synchronously moves along with the upper gripper oil cylinder is relieved, and the gripper pressure of all the gripper oil cylinders is controlled to be increased to the pressure F2 needed by the preset gripper oil cylinders to tightly support the hole wall. By applying the method, when the gripper oil cylinders stretch out or retract back, the lower gripper oil cylinder is restrained to synchronously move along with the upper gripper oil cylinder, so that the problems that due to the fact that the upper gripper oil cylinder and the lower gripper oil cylinder are not synchronous in action, a gripper body interferes with a shield shell of a tight supporting shield, consequently, a gripper is clamped, and mechanical structures such as a rolling shaft are damaged are solved.

Description

technical field [0001] The invention relates to the technical field of TBM step-changing control, and more specifically, relates to a shield-type TBM step-changing method. Background technique [0002] At present, shield-type TBM steps are mainly operated manually, and the control effect and accuracy are greatly affected by personnel. Improper operation can easily cause interference between the shroud 8 and the shield shell 31, and the jamming of the shroud 8, while the shroud It plays the role of providing thrust for the TBM to advance forward during the excavation. It is a key part of the TBM excavation. If the stay shoe is stuck, it will directly cause damage to the mechanical structure such as the roller and reduce the service life of the equipment. If the stay shoe is stuck The driver still forcibly operates after the jam, which will also cause changes in the attitude of the TBM, which will seriously affect the tunneling efficiency and precision, and even affect constru...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the first object of the present invention is to provide a shield-type TBM step-changing method to solve the problem that the shoe cylinder is likely to interfere with the shield when the operation is improper, causing the shoe to be stuck

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