数值分析

盾构刀盘偏置中心刀对刀盘推力和扭矩的影响

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  • 天津大学 机械工程学院,天津 300072
冷冬梅,女,1986年生,博士研究生,主要从事隧道及地下工程方面的研究

收稿日期: 2014-02-18

  网络出版日期: 2018-06-14

基金资助

国家重点基础研究发展计划资助(No.2013CB035402);国家自然科学基金(No.11172200);国家自然科学基金科学仪器基础研究专项(No.11127202)。

Effects of offset center tool of shield on thrust and torque on cutterhead

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  • School of Mechanical Engineering, Tianjin University, Tianjin 300072, China

Received date: 2014-02-18

  Online published: 2018-06-14

摘要

盾构机是地下工程中的典型掘进装备,具有结构复杂、体积庞大、重型巨载等特点。刀盘载荷是装备的核心力学参量,实现刀盘载荷的合理计算是装备正向设计的理论基础,也是不同地质情况隧道施工中载荷控制的重要科学依据。盾构刀盘中心刀结构在掘进过程中承受很大比重的轴向载荷,为了进一步分析中心刀结构的改变对刀盘载荷的影响,采用数值仿真方法与模型试验方法对盾构刀盘与土体的相互作用进行了研究,得到了刀盘法向和切向切削载荷空间分布规律以及掘进过程中刀盘总推力和扭矩随掘进时间的变化规律,重点分析了偏置中心刀结构对刀盘推力和扭矩的影响。对比几种不同的中心刀结构,研究表明,偏置中心刀结构刀盘的总推力与总扭矩小于鱼尾中心刀结构刀盘的总推力与总扭矩。刀盘模型试验结果与数值仿真结果趋势一致。从载荷角度考虑,偏置中心刀刀盘优于鱼尾中心刀刀盘。该研究结果可为新型刀盘结构设计提供参考。

本文引用格式

冷冬梅,蔡宗熙,王燕群,侯振德 . 盾构刀盘偏置中心刀对刀盘推力和扭矩的影响[J]. 岩土力学, 2015 , 36(6) : 1776 -1783 . DOI: 10.16285/j.rsm.2015.06.032

Abstract

Shield machine is a kind of typical equipment for tunneling, it is featured by heavy body, complex structure and high load. The load acting on cutterhead during tunneling is a core mechanical parameter for the equipment. The reliable calculation of the load is important in terms of positive equipment design and load control of tunnel constructions under different geological conditions. The center tool of shield cutterhead bears a large proportion of axial load in the tunneling process. To further analyze the effects of center tool with different structures on the load on shield cutterhead, the studies of the interaction between the shield cutterhead and the soil of tunnel face are conducted by means of numerical simulation and model experiment. The dynamic cutting load distribution along the normal and tangential directions of cutterhead is obtained; and the temporal variations of the total thrust and torque during the process of excavation are also achieved. The effects of the offset center tool on the total thrust and torque on cutterhead are emphatically analyzed. By comparing the loads acting on different types of cutterheads, one can see that the offset center tool produce lower total thrust and torque than the fishtail center tool does. The results of numerical simulation are in good agreement with the experimental results. The offset center tool installed on a cutterhead can reduce the total thrust effectively. From the loading point of view, the offset center tool is better than the fishtail center tool. The research results can provide some useful guidelines for the design of new shield cutterheads.
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