浅埋暗挖岩石隧道下穿公路引起的路面沉降监测分析

Monitoring analysis of pavement settlement caused by shallow underground excavation of rock tunnel passing underneath an existing highway

随着我国基础设施大规模建设,出现了大量下穿高速公路的待建隧道,对隧道施工引起的高速公路路面沉降进行分析与控制是保证高速公路正常运营的关键。对宁海县乌岩山隧道施工引起的甬台温高速公路沉降监测数据进行了分析,并讨论了路面沉降对高速公路行车安全的影响。研究结果表明:6个监测断面中,4个断面在30d左右沉降收敛完成,另外两个分别为15d和42d;各个测点最终的累计沉降量为4.6mm^8.1mm,小于一般的控制基准30mm,故认为该隧道施工引起的高速公路路面沉降对行车安全影响不大,与实际行车体验反映一致。

With the large-scale construction of infrastructure in China,there are a large number of tunnels to be built passing underneath an existing highway.Analysis and control of the settlement of expressway pavement caused by tunnel construction is the key to ensure the normal operation of expressway.In this paper,the monitoring data of Yongtaiwen Expressway settlement caused by Wuyanshan Tunnel construction in Ninghai County is analyzed,and the influence of pavement settlement on expressway traffic safety is discussed.The results show that:of the six monitoring sections,the settlement convergences of four sections are completed in about 30 days,and those of the other two sections are 15 days and 42 days respectively,the final accumulative settlement of each measuring point is 4.6 mm^8.1 mm,which is less than the general control benchmark of 30 mm.Therefore,it is considered that the settlement of expressway pavement caused by the tunnel construction has little impact on driving safety,which is consistent with the actual driving experience.