Earth pressure balance control system of rectangular shield tunneling machine and method of earth pressure balance control system

Abstract

The invention provides an earth pressure balance control system of a rectangular shield tunneling machine, which is used for the rectangular shield tunneling machine equipped with dual spiral conveyors to perform earth pressure balance control. The earth pressure balance control system comprises interaction operation equipment, a computer PLC (programmable logic controller) master station, a hydraulic pump station and an earth pressure sensor; the computer PLC master station is connected with the interaction operation equipment; the earth pressure sensor is arranged at an earth bin of the shield tunneling machine; the computer PLC master station controls the operation of the two spiral conveyors by the hydraulic pump station according to the data sent from the earth pressure sensor. According to the earth pressure balance control system, on one hand, the earth pressure condition of the earth bin is subjected to feedback control in real time by using the information transmission between the earth pressure sensor and the computer PLC master station, on the other hand, for the control on the rotary speed of the spiral conveyors, the combined use of the computer PLC master station and the hydraulic pump station is introduced, the technology of controlling a variable pump by a hydraulic driving hydraulic proportional valve is applied, and the control on the earth pressure is more sensible, faster and more reliable.

Description

technical field [0001] The invention relates to the innovation of a rectangular shield machine, in particular to an earth pressure balance control system of a rectangular shield machine and a method thereof. Background technique [0002] The usual round or small section earth pressure balance shield machine is a kind of technology-intensive major engineering equipment used for excavating underground tunnels in soft soil. Usually, a screw conveyor is used for soil discharge transportation. The main function is to discharge the soil cut by the cutter head in the soil chamber of the shield machine out of the shield body, and to control and maintain the earth pressure balance, which is an important part of the earth pressure balance shield machine. component. [0003] Due to the large cross-section of the large-section rectangular shield machine, if one screw conveyor is used for soil discharge transportation, it cannot meet the needs of construction soil discharge, so two scre...

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Problems solved by technology

[0003] Due to the large cross-section of the large-section rectangular shield machine, if one screw conveyor is used for soil discharge transportation, it cannot meet the needs of construction soil discharge, so two screw conveyors (that is, double-screw conveyors) are required for soil discharge. Soil transportation, which will greatly increase the difficulty of the control of the earth pressure balance system, and put forward higher requirements for the automatic control of the earth pressure balance

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