山岭隧道爆破施工中初衬结构变形实时监控的研究

Study on Real-time Monitoring of Deformation of Primary Lining Structure in Blasting Construction of Mountain Tunnel

摘要:

探讨了目前山岭隧道爆破施工时安全监测手段上的不足点，希望探索一条通过爆破过程中及爆破后的初衬形变的监测，实现施工中的安全监测方法。结合杭绍台高速公路台州段隧道施工，通过安装在初衬钢拱架拱腰部位的二维位移传感器，连续监测在爆破前后的钢拱架二维位移情况。及时捕捉到了爆破后的位移动态响应和滞后相应。为建立基于监测二维位移方法的隧道安全监测奠定了基础。

Abstract:

The shortcomings in the safety monitoring means are further discussed during the blasting construction of mountain tunnel. It is hoped to explore a monitoring method of the primary lining deformation in the blasting process and after blasting, and the safety in the construction implementation. Combined with the tunnel construction in Taizhou Section of Hangzhou-Shaoxing-Taizhou Expressway, 2D displacement of steel arch frame is continuously monitored before and after blasting through the installation of 2D displacement sensor at the arch waist position of primary lining steel arch frame. The displacement dynamic response and lag response after blasting are captured in time, which lays a foundation for the construction of tunnel safety monitoring based on 2D displacement monitoring method.