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新奥法施工的核心思想是把隧道围岩和支护结构作为一个完整的支护体系,监控量测是新奥法施工的重要组成要素。作者以亚婆髻隧道为例,主要论述拱顶下沉、周边收敛及锚杆轴力等监控量测项目。通过对采集到的数据进行分析可以得到:围岩变形量的大小与围岩质量及开挖方式密切有关;对于分台阶开挖方式,在下台阶开挖时,围岩变形较大;软岩中,锚杆轴力沿杆长的最大值出现在靠中间点的位置。根据围岩稳定状态来确定二衬施作时机,保障了施工安全,同时也可为分析研究同类工程提供参考。
The core idea of the construction of the new Austrian law is to tunnel surrounding rock and supporting structure as a complete support system, monitoring and measurement is an important part of the new Austrian law construction. The author takes Ya Po bun tunnel as an example, mainly discusses the monitoring and measuring items such as vault sinking, surrounding convergence and bolt axial force. Through the analysis of the collected data, the deformation of the surrounding rock is closely related to the quality of the surrounding rock and the way of excavation. For the sub-step excavation method, the surrounding rock deforms greatly when the next step is excavated. In the soft rock , The maximum axial force of the anchor rod along the length of the rod appears at the middle point. According to the stability of the surrounding rock to determine the timing of the second lining to protect the construction safety, but also for the analysis of similar projects provide a reference.