摘要
大量工程实践表明,在含有孤石的地层中进行隧道施工时,孤石的存在将会破坏地层的单一性与均质性,诱发地层变形程度加剧,导致围岩产生较大变形,严重时可能诱发地面沉陷、周边建筑物损伤等问题,危及群众的生命及财产安全.为研究孤石对隧道施工时围岩变形的影响规律,依据深圳地铁13号线留—白区间隧道工程实例,首先对隧道掘进过程中孤石引起的地层变形规律进行理论分析,探索孤石存在的条件下围岩塑性区分布规律;并通过Midas GTS NX数值模拟软件对比分析隧道穿越地层有无孤石对围岩变形的影响特征;整理并总结深圳13号线留—白区间隧道穿越孤石地层时工程处理措施项目孤石处理措施,研究成果可为今后类似工程安全施工提供一定的参考.
A large number of engineering practice shows isolated rocks destroy the single and homogeneity in tunnel construction,large deformation from which induces ground subsidence that has damage to surrounding buildings,and it endanger the life and property safety of the masses.Taking the tunnel project of Shenzhen Metro Line 13 as the case,the influence law of boulders on surrounding rock deformation during tunnel construction is studied.First-ly,the formation deformation law caused by solitary rocks in the tunneling process is theoretically analyzed,and the distribution law of the surrounding rock plastic area under the condition of boulder existence is investigated.The in-fluence of rock on stress and deformation is analyzed by Midas GTS NX numerical simulation software.Finally,the engineering treatment measures for the project are summarized,which provides the reference for the safe construc-tion of similar projects in the future.
作者
韩照恒
张树光
彭斌
师启蒙
张永义
HAN Zhaoheng;ZHANG Shuguang;PENG Bin;SHI Qimeng;ZHANG Yongyi(School of Civil Engineering,Qingdao University of Technology,Shandong Qingdao 266400,China;China Construction Fith Division South China Company,Guangzhou 510000,China)
出处
《低温建筑技术》
2023年第2期109-112,共4页
Low Temperature Architecture Technology
基金
中国股份科技研发计划(CSCEC-2019-Z-49)。
关键词
孤石
盾构施工
围岩变形
isolated rocks
shield construction
rock deformation
