监控量测在公路隧道必测项目中的应用

Application of Monitoring Measurementof the Must Test Project in Highway Tunnel

为研究监控量测在隧道监测中的应用问题,以莲峰2号隧道为工程依托,对隧道特定断面采取监控量测并结合现场岩质情况对掌子面围岩进行分析,通过对比分析来检验监控量测在隧道施工过程中的重要性.结果表明:当前围岩变形较小,基本处于稳定状态,采用全断面开挖是切实可行的;拱顶沉降速率和周边收敛速率均随时间呈波动性变化,日拱顶沉降速率和周边收敛速率波动性较强,平均拱顶沉降速率和周边收敛速率相对较弱,二者整体上随测量时间呈逐渐递减趋势,累计拱顶沉降量和周边收敛量均随测量时间而逐渐递增;累计周边收敛随累计拱顶沉降量逐渐递增,二者之间满足线性函数关系。

Based on Lianfeng No.2 tunnel project,in order to study the application of monitoring measurements in tunnel monitoring measurements were taken for specific sections of the tunnel,combined with the on-site rock conditions,the surrounding rocks were analyzed on the tunnel surface,and the importance of monitoring measurements in tunnel construction was tested through comparative analysis.The results showed that basic is in stable condition,the surrounding rock deformation is small,and the whole section excavation is feasible.Among them,the vault subsidence rate and peripheral convergence rate are changing with time in volatility,day arch sedimentation rate and peripheral convergence rate volatility is stronger,the average arch sedimentation rate and peripheral convergence rate is relatively weak,on the whole gradually decreasing trend as measuring time,cumulative vault subsidence and peripheral convergence rate increases gradually over time.The accumulative peripheral convergence increases gradually with the accumulative arch settlement,the relation is linear function.