Muck improving control method and system based on shield tunneling parameter change

Abstract

The invention discloses a muck improving control method and system based on shield tunneling parameter change. The muck improving control method comprises the following steps: a soil bin pressure value and a cutterhead torque value for shield tunneling are obtained in real time, whether the soil bin pressure value and the cutterhead torque value for shield tunneling meet a first condition or not is judged, if the soil bin pressure value and the cutterhead torque value for shield tunneling meet the first condition, it is judged that currently-used tunneling parameters and improving parameters are suitable for a current tunneling formation condition, if the soil bin pressure value and the cutterhead torque value for shield tunneling does not meet the first condition, it is judged that the currently-used tunneling parameters and improving parameters are not suitable for the current tunneling formation condition, and the improving parameters and the tunneling parameters are adjusted till the improving parameters and the tunneling parameters are suitable for the current tunneling formation condition. By adjusting the improving parameters based on the shield tunneling parameter change, the improving parameters suitable for a corresponding formation are obtained, unimproved muck does not need to be obtained again for testing in the period, and the problems that in the tunneling process, muck taking is difficult, the difference between an actual formation condition and obtained muck is large, and consequently determined improving parameters are not reasonable are avoided.

Description

technical field [0001] The invention belongs to the technical field of shield tunneling, and in particular relates to a dregs improvement control method based on the variation of shield tunneling parameters. Background technique [0002] Due to its fast construction speed and little disturbance to the surrounding environment, the earth pressure balance shield can better adapt to the construction conditions of urban tunnels, and has become the preferred model for urban tunnel construction. However, the key to its smooth excavation is to keep the shield muck in a "plastic flow" state, which is conducive to the establishment of effective soil pressure in the muck in the soil bin to balance the water and soil pressure on the tunnel face, and at the same time prevent gushing, mud cake on the cutterhead, and In case of problems such as blockage of soil bins or excessive deformation of the ground surface, it is determined that the excavation parameters are stable within an appropri...

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Problems solved by technology

Although the method can provide some guidance for actual construction, the excavation time and slag output of each ring of the shield vary according to the actual excavation conditions, and the amount of slag modifier added is determined by the flow meter of the automatic control system of the man-machine interface. Real-time control and stratum conditions will change with the shield tunneling. The improved parameters determined in the early stage are difficult to apply to the actual construction process to achieve the expected results.

During the excavation process of the shield machine, the shield driver can only dynamically adjust the improvement parameters through the intuitive judgment of the plastic flow state of the muck and the excavation parameters, and fails to systematically form a method for determining the improvement parameters of the muck based on the actual state of the shield excavation. Misjudgment may lead to greater risks

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