特大断面公路隧道扁平率数值分析

以四川省某水电工程特大断面隧道为工程背景，结合工程区岩石力学试验参数，利用有限元分析软件开展不同扁平率下特大断面隧道围岩和支护应力场、位移场等的分析研究，得出特大断面隧道的扁平率合理控制范围及其受力特性，对特大断面隧道的设计优选具有一定的参考价值。

Numerical Analysis for Flatness Ratio of King-size Section Highway Tunnels

With the king- size section background, and in combination with tunnel of some hydropower project in Sichuan Province as project mechanical test parameters of rocks in project area, this paper develops analysis and study of wallrock and support stress fields and displacement fields, etc. of ultra- large section tunnels at different span ratio and obtains reasonable control range and stress characteristics of span ratio of ultra-large section tunnels so as to provide a certain reference values for design optimization of ultra-large section tunnels.