特长软岩公路隧道结构设计与稳定性分析

Structure Design and Stability Analysis of An Extra-long Highway Tunnel with Soft Rock

介绍了特长软岩公路篮家岩隧道结构设计过程,借助于有限元数值模拟方法,采用梁-弹簧模型模拟衬砌结构,进行了隧道结构的力学特性分析,通过对其二次衬砌进行受力计算及稳定性分析,阐述软岩隧道段设计思路及支护手段,验证可支护参数的合理性及可靠性。

This paper introduces the design process of the Lanjiayan extra-long highway tunnel with soft rock, analyzes mechanical properties of tunnel lining structure which is simulated with beam-spring model using finite element mentod. The design thought and support means are introduced, the stress of tunnel secondary lining is calculated and structure stability is analyzed to prove the rationality and reliability of support parameters.