摘要
双连拱隧道开挖跨度大、施工工序多,对围岩形成反复扰动,容易导致围岩自稳能力的丧失,施工中一旦控制不力很容易导致隧道围岩失稳、坡面下滑开裂等事故,进而危及隧道的施工安全。针对某高速公路双连拱隧道洞口段围岩失稳事故的处理,以隧道的监控量测数据分析为基础,研究制定了洞口段围岩的加固措施,并在实际工程中取得了成功应用。
Double arch tunnel excavation has a large span and many construction process,produced repeated disturbance to surrounding rock,so it is easy to lead to the loss of self stability of surrounding rock.Once the control is not effective,it is easy to cause tunnel surrounding rock instability,slope sliding and cracking,and then endanger the safety of tunnel construction.In order to deal with the instability accident of the surrounding rock of the entrance section of a double-arch tunnel of an expressway,based on the analysis of the monitoring data of the tunnel,the reinforcement measures of the surrounding rock of the entrance section are studied and formulated,which have been successfully applied in practical projects.
作者
段军
王宾
DUAN Jun;WANG Bing(Yunnan Construction Infrastructure Investment Co.,Ltd,Kunming Yunnan 650500,China)
出处
《西部探矿工程》
CAS
2020年第9期183-185,188,共4页
West-China Exploration Engineering
关键词
双连拱隧道
边仰坡
稳定性
变形监测
加固技术
double-arch tunnel
side and face upward slope
stability
deformation monitoring
reinforcement technology
