Determination of the cutterhead torque for EPB shield tunneling machine
Determination of the cutterhead torque for EPB shield tunneling machine
复制标题
DOI：
10.1016/j.autcon.2011.04.010
复制
发表时间：
2011-12
影响因子：
10.3
通讯作者：
Hu Shi;Huayong Yang;Guofang Gong;Lintao Wang
中科院分区：
文献类型：
--
作者：
Hu Shi;Huayong Yang;Guofang Gong;Lintao Wang
刀盘扭矩是土压平衡盾构设计和使用中的重要参数。通过对现场已完成的几个工程实例的分析，证明了传统的基于实验的扭矩确定模型是粗略的，需要加以改进。从刀盘结构、切割原理、刀盘与土壤的相互作用等方面，提出了刀盘扭矩的组成及相应的计算方法。结合实验室中的Φ1.8m土压平衡试验机，对三种典型土进行了改进模型的理论计算和试验。计算和试验结果表明，刀盘扭矩随地质条件变化明显，刀盘开度比和土压力是决定刀盘扭矩的两个重要因素。试验结果还表明，土压平衡盾构掘进扭矩计算公式能较好地预测粘性土隧道掘进时刀盘所需的开挖扭矩，而对于无粘性掘进，土体调质降低了所需的扭矩。
Cutterhead torque is an important parameter for the design and operation of earth pressure balance (EPB) shields. Based on the analysis of several completed project cases from job sites, the conventional torque determination model based on experimentation proves rough enough to be improved. Composition and corresponding calculation method of cutterhead torque are presented, taking into account of cutterhead structure, cutting principle and the interaction between cutterhead and soil. Considering a Φ1.8m EPB test machine in the lab, theoretical calculation following the improved model and test are carried out with three typical types of soils. Calculation and test results indicate that the cutterhead torque varies with geological conditions apparently, and the opening ratio of the cutterhead as well as earth pressure turns out to be the two most important factors in determining the cutterhead torque. The test results also show that the torque calculation formula for EPB shield tunneling can reasonably predict the excavation torque required by the cutterhead in clay soil tunneling, but for cohesionless tunneling, soil conditioning reduces the amount of torque necessary.