传感器在半路半隧结构受力监测中的应用

Application of sensor in stress monitoring of half subgrade and half tunnel structure

当隧道走向与地形等高线斜交,且地形起伏较大时,在洞口段采用半路半隧结构可以有效减少对自然环境的破坏,并确保隧道有足够的覆土厚度。该结构施工工序复杂,施工期间其受力复杂多变,施工难度大,必须通过监控量测及时掌握隧道围岩和支护结构动态信息,以保证边隧道施工安全。介绍了对殿会坪隧道出口段半路半隧结构受力的监测方案和相关监测结果。监测结果表明:该结构安全稳定,是解决此类问题的一种好方法,且所使用的传感器能有效完成相关监测任务。

When tunnel cross obliquely with terrain contour,and terrain has bigger ups and downs,using half subgrade and half tunnel structure at portal section can effectively reduce the damage to the natural environment,and ensure that the tunnel have enough thick soil cover.The construction process of this structure is complex,and the force during construction is complicated.So the difficulty of construction is great.In order to ensure the safety of tunnel construction,dynamic information of surrounding rock and supporting structure must be grasped by monitoring.The monitoring plan and relevant results of half subgrade and half tunnel structure at portal section of Dianhuiping tunnel is introduced.Monitoring results show that the structure is safe and stable in the process of construction,and this structure is a good method to solve these problems.These sensors can effectively complete relevant monitoring task.