连拱隧道底部岩溶处理方法及其计算分析

摘要:

目前隧道跨越溶洞的处理多以经验为主,处理后也无相应的评价方法,针对这一现状,采用理论计算方法对该问题进行了研究。结合一典型双跨连拱隧道工程实例,在综合比较多种底部溶洞处理方案的基础上,在隧道底部采用拱梁结构跨越溶洞,探讨了计算模型的建立方法和计算荷载的确定方法,提出了隧底拱梁结构的安全判定标准并对该工程实例的安全性进行了判断,所提出的计算方法对保证隧道安全具有重要意义。

Abstract:

The paper discussed the establishing method of calculation model and determining method of load calculation in according to a typical double span continuous arch tunnel ease, the author made comprehensive comparison on several treatment concepts of karst cave in bottom and determined to adopt arch-beam structure. Judging standard of safety was put forward for arch - beam in bottom of the tunnel and the judgment on the engineering ease was made.