摘要
全断面岩石掘进机(TBM)的滚刀布局直接影响TBM隧道工程的掘进效率。基于颗粒离散元计算方法,建立中心滚刀群与围岩的相互作用模型,模拟TBM掘进过程中双刃中心滚刀的破岩过程,从单一滚刀受力特征、中心滚刀区域刀盘整体力学性能以及岩石裂纹扩展等方面研究中心滚刀的受荷规律及布置形式。研究结果表明:(1)中心双刃滚刀的垂直力和滚动力随着安装半径增加呈现增大趋势,而侧向力变化并不明显;(2)双刃中心滚刀内侧刀圈受力小于外侧刀圈,且内外侧刀圈的受荷差异随着安装半径增加而减小;(3)“十”字形中心滚刀布置方式可降低单一刀圈受力和中心滚刀区域刀盘整体受荷,有利于TBM掘进时的稳定,建议岩质地层复合式TBM中心双刃滚刀的布置采用“十”字形布置方式。
The cutter arrangement of the full-face Tunnel Boring Machine(TBM)directly affects the tunneling efficiency of the TBM tunnel project.Based on the particle discrete element calculation method,the interaction model between center cutter group and the surrounding rock is established and the rock breaking process of the double-edged center cutter during TBM tunneling is simulated.The load law and arrangement form of the center cutter are studied from the aspects of the force characteristics of the single cutter,the overall mechanical properties of the cutter head in the central cutter area and the rock crack propagation.The results show that:(1)The normal force and rolling force of the double-edged center cutter increase with the increase of the installation radius,while the side force does not change obviously;(2)the force of the inner ring of the double-edged center cutter is less than that of the outer ring,and the load difference between inner and outer side cutter rings decreases with the increase of the installation radius;(3)The“cross”-shaped center cutter arrangement can reduce the force of the single cutter ring and the overall load of the cutter head in the center cutter area,which is conducive to the stability of TBM tunneling.It is recommended that the layout of the double-edged center cutter of the rock formation compound TBM should adopt cross shape arrangement.
作者
汪平
张康健
李进
张志强
李小伟
WANG Ping;ZHANG Kangjian;LI Jin;ZHANG Zhiqiang;LI Xiaowei(Chongqing Communications Construction(Group)Co.,Ltd.,Chongqing 400010,China;Key Laboratory of Transportation Tunnel Engineering,Ministry of Education,Southwest Jiaotong University,Chengdu 610031,China;Chongqing Jianzhu College,Chongqing 400072,China)
出处
《铁道标准设计》
北大核心
2022年第10期123-129,共7页
Railway Standard Design
基金
国家自然科学基金项目(51878572)
国家自然科学基金高铁联合基金项目(U1934213)。
