连拱隧道中隔墙现场监测及分析研究

Site Monitoring and Analysis of Middle Wall of Multi-Arch Highway Tunnel

在隧道工程建设中,现场监控量测及信息反馈在修正设计、指导施工、确保施工安全等方面发挥着越来越重要的作用。中隔墙作为连拱隧道的中枢结构和重要承载构件,其受力及位移情况往往对工程成败和安全起着决定性作用。在多座连拱隧道现场监测工作的基础上,文章主要介绍了主筋轴力量测、混凝土表面应变量测、混凝土内部应变量测,以及位移量测等针对连拱隧道中隔墙的现场监测方法,并结合中隔墙主筋轴力量测,给出一现场监测及分析实例。最后,对连拱隧道中隔墙现场监测提出了一些建议。

Site monitoring and information feedback have been playing an ever - increasing role in modifying design, directing construction and ensuring safety in the process of tunnel construction. As an important beating structure, the middle wall in the multi arch tunnel, often dominates the success and safety of a project. On the base of site monitoring on several multi - arch highway tunnels, this paper introduces some site monitoring methods about the foree of reinforoing steel bar, the exterior and interior strain of concrete and the displacement of the wall, which aim at the monitoring of middle wall of multi - arch highway tunnel. At last, an example of site monitoring about middle wall is given and some advice are suggested.