论文部分内容阅读
基于翔安隧道现场监测数据,并结合数值方法,对CD法、CRD法及双侧壁导坑法的应用情况进行了探讨。研究发现,在大跨度海底隧道修建过程中,施工工法对隧道结构的变形及受力具有重要的影响。应用双侧壁导坑法施工时隧道拱顶下沉量比CRD和CD法小,而CRD法施工引起的该值又比CD法小;在控制隧道结构水平收敛方面,CRD法效果最好,它所引起的隧道水平收敛量值明显低于双侧壁导坑法和CD法。在支护结构安全性方面,应用双侧壁导坑法施工时,隧道结构受力较好,结构安全系数较大,而采用CD法施工时,隧道边墙安全系数小于1。因此,在翔安隧道施工期间,双侧壁导坑法和CRD法为合理工法。
Based on the on-site monitoring data of Xiang’an tunnel and the numerical methods, the application of CD method, CRD method and double-side wall guide method are discussed. The study found that during the construction of long-span submarine tunnel, the construction method has an important impact on the deformation and force of the tunnel structure. The application of double-sidewall pilot tunnel construction tunnel tunnel crown than the CRD and CD method is small, and the CRD method of construction caused by this value is smaller than the CD method; in the control of the tunnel structure level convergence, the CRD method works best, The value of tunnel horizontal convergence caused by it is obviously lower than that of double-sidewall pilot and CD methods. In the aspect of supporting structure safety, when the construction of double-side wall guide pit method is adopted, the stress of the tunnel structure is better and the safety factor of the structure is larger. When the CD method is adopted, the safety coefficient of the side wall of the tunnel is less than 1. Therefore, during the construction of Xiang’an Tunnel, the double-wall pilot method and CRD method are reasonable methods.