摘要
为研究岩体节理及岩块力学参数对TBM净掘进速率的影响,采用离散元法分析岩体节理倾角和间距对TBM净掘进速率的影响。结合施工现场统计资料,研究岩块力学参数与TBM净掘进速率相对关系。结果表明:(1)当其他条件不变,节理倾角在0°~60°时,TBM净掘进速率随节理倾角增大而加快;而当节理倾角在60°~90°时,TBM净掘进速率随倾角增大而降低。(2)一定范围内,节理面发育程度越高,节理组数越多,TBM净掘进速率越高。(3)TBM净掘进速率随岩石单轴抗压强度和弹性模量增大而减小,随泊松比增大而提高。本文得出一系列有意义的拟合曲线,可为定量分析TBM净掘进速率与岩体节理及岩块力学参数之间关系提供依据。
To study the influence of rock mass joints and rock block mechanical parameters on the penetration rate of TBM,the discrete element method was used to analyze the influence of rock mass joint inclination angle and spacing on the penetration rate of TBM.Based on the statistical data of the construction site,the correlation between rock mechanics parameters and TBM penetration rate was studied.The results show that:(1)when other conditions remain unchanged and the joint inclination angle is between 0°and 60°,the penetration rate of TBM increases with the increase of the joint inclination angle;when the joint inclination angle is between 60°and 90°,the penetration rate of TBM decreases with the increase of inclination angle.(2)Within a certain range,the higher the degree of joint development and the number of joint groups,the higher the penetration rate of TBM.(3)The penetration rate of TBM decreases with the increase of uniaxial compressive strength and elastic modulus of the rock,and increases with the increase of Poisson′s ratio of the rock.This paper obtains a series of meaningful fitting curves,which can provide a basis for quantitative analysis of the relationship between TBM penetration rate and rock joint and rock block mechanical parameters.
作者
史勇
陈勇
张康健
张志强
SHI Yong;CHEN Yong;ZHANG Kangjian;ZHANG Zhiqiang(Chongqing Communications Construction(Group)Co.,Ltd.,Chongqing 400010,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu Sichuan 610031,China)
出处
《铁道建筑技术》
2024年第2期14-18,63,共6页
Railway Construction Technology
基金
重庆交通建设(集团)有限责任公司科技研究项目(20170505)。
关键词
TBM
节理倾角
力学参数
净掘进速率
离散元法
TBM
joint inclination angle
mechanical parameter
penetration rate
discrete element method
作者简介
史勇(1974—),男,江苏南京人,高级工程师,主要从事城市轨道交通施工管理技术研究方面的工作,E-mail:2965074964@qq.com。
