Mini-sized shield machine earth pressure balance control system and control method thereof

Abstract

The invention discloses a min-sized shield machine earth pressure balance control system and a control method thereof. The earth pressure balance control system comprises an earth pressure sensor arranged in a mini-sized shield machine sealing cabin and used for monitoring the earth pressure in the sealing cabin. The earth pressure sensor is electrically connected, through an AD conversion circuit, with a controller used for comparing the preset earth pressure data and real-time earth pressure data of a mini-sized shield machine and sending regulation control signals. The controller is electrically connected with a motor used for regulating the earth pressure balance of the mini-sized shield machine. The mini-sized shield machine can regulate the pressure in the shield machine sealing cabin quickly and stably, can find the best working point of a motor on the condition that external parameter perturbation such as different soil environments and mini-sized shield machine working states exist, so that a stable excavation face is maintained, the excavation face is prevented from collapsing, and the deformation of the excavation face is effectively controlled.

Description

technical field [0001] The invention relates to a micro-shield machine, in particular to a micro-shield machine earth pressure balance control system and a control method. Background technique [0002] In the field of underground tunnel construction engineering, the currently widely used tunneling equipment is the shield boring machine, referred to as the shield machine, which is a special machine for excavating underground tunnels in weak geology. While the mini-shield machine is safely digging forward and discharging slag according to the planned route underground, the surrounding rock foundation is required to be stable, and the excavation surface is kept stable in the shield shell. When the earth pressure in the airtight cabin is lower than that of the excavation surface, foundation settlement will occur; on the contrary, when the earth pressure in the airtight cabin is greater than that of the excavation surface, it will cause the surface to bulge, and in severe cases, ...

AI Technical Summary

Problems solved by technology

However, the pressure in the airtight chamber of the micro-shield machine is determined by the interaction of the cutterhead system, propulsion system, and slag discharge system. Therefore, the control method of each subsystem based on the operator's intuition and experience can easily lead to serpentine Problems such as routes, machine failures, and ground subsidence seriously affect control efficiency and accuracy, and even cause safety issues

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