Control method and system for dregs improvement based on shield tunneling parameters change

Abstract

The invention discloses a dreg improvement control method and system based on shield tunneling parameter changes. By acquiring and judging in real time whether the soil bin pressure value and cutter head torque value of shield tunneling meet the first condition, if the first condition is met, judge The currently used tunneling parameters and improved parameters are suitable for the current tunneling stratum conditions. If the first condition is not met, it is judged that the currently used tunneling parameters and improved parameters are not suitable for the current tunneling stratum conditions, and the improved parameters and tunneling parameters are adjusted until they are suitable for the current tunneling. For stratum conditions, the improved parameters adapted to the corresponding stratum are obtained through the adjustment of the improved parameters based on the change of the excavation parameters. During this period, it is not necessary to obtain unimproved dregs for testing again, which avoids the difficulty of taking soil during the excavation process and the actual stratum conditions and obtained dregs. The difference is large, which leads to problems such as unreasonable improvement parameters determined.

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...

AI Technical Summary

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

Images