Calculation method for cutter torque of composite shield machine in rock and soil mixing geology tunneling

Abstract

The invention discloses a calculation method for the cutter torque of a composite soil pressure balanced shield machine in rock and soil mixing geology tunneling. The calculation method comprises thefollowing steps that: independently calculating the following torque: torque generated by hobbing cutter rock breaking, frictional resistance torque generated by the tunneling extrusion of a contact part of a cutter panel and a soft soil layer, frictional resistance torque generated by the covering burial depth of the contact part of the cutter panel and the soft soil layer, the stratum resistancetorque of a cutter cutting soil body, frictional resistance torque between the side surface of the cutter and soft soil, frictional resistance torque T6 between the side surface of the cutter and rock and the stirring resistance torque of a stirring arm in a soil cabin; and calculating the tunneling cutter torque. By use of the calculation method, the cutter torque of the composite soil pressurebalanced shield machine in the tunneling process of the rock and soil mixing geology can be quickly and accurately calculated, and a calculation result is accurate and reliable. In addition, torque parameters can be flexibly regulated according to the change of a geological condition and tunneling speed at any time, and a reliable data basis is provided for setting and regulating the cutter torqueparameters in real time in the design and construction process of the dynamical system of the composite soil pressure balanced shield machine equipment.

Description

Technical field [0001] The invention relates to a method for calculating the torque of a cutter head in a composite earth pressure balance shield. In particular, it relates to a method for calculating the torque of the cutter head of a composite earth pressure balance shield in the excavation of rock-soil mixed geology. Background technique [0002] The tunnel boring machine is a complex engineering equipment system that integrates mechanical, electrical, hydraulic, optical, and gas systems and can realize factory tunnel operations. The shield construction method is widely used in the construction of large tunnel projects such as underground transportation and various transportation pipelines due to its advantages of small disturbance to the surrounding environment and high operation efficiency. [0003] According to the different ground conditions and specific construction methods, tunnel boring machines can generally be divided into hard rock tunnel boring machine (TBM), soft so...

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Problems solved by technology

[0004] At present, the existing research on the cutter head torque mainly includes: 1. The calculation method of the cutter head torque of the tunnel boring machine in the excavation of the soft soil stratum; When the hob breaks the rock to generate torque, the frictional torque generated by the rock-soil mixture on the front and side of the cutterhead is not considered, that is, the torque of the entire cutterhead is not studied; 3. The composite earth pressure balance shield machine is analyzed in rock In soil mixed geology, the torque generated by cutter cutting soil and hob breaking rock, but when analyzing the frictional torque between the front, side and rock and soil of the cutterhead, the rock-soil mixed geological structure is simplified into a homogeneous soft soil layer, and the excavation is not considered The existence of hard rock below the face and how to analyze the mechanism of the hard rock layer on the torque of the cutter head, that is, ignoring the influence of the complexity of the formation structure on the load of the cutter head

To sum up, the current research still lacks a fast and accurate method for determining the cutterhead torque of the composite earth pressure balance shield during rock-soil mixed geological excavation. The calculation of the cutterhead torque of the composite earth pressure balance shield needs to consider each Influence of layer geology

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