盾构机, 推进系统, 冗余驱动, 机液耦合, 堵停

First, a dynamics model of mechanical structure considering redundant drive of a shield tunneling machane was presented, then a simplified model of single group hydraulic system was built, further a hydraulic-mechanical coupling model of the whole thrust system was established, and a method based on the relationship between external load and pressure relief valve opening was adopted to judge system state. To analyze the characteristics of thrust cylinder groups under extreme load, numerical simulation was run in MATLAB/Simulink environment. Results show that this method judges the thrust system effectively and is dependable basis for drive distribution control when shield tunneling machine thrust in heterogeneous soil.   