连拱隧道和小净距隧道的有限元比较分析

Comparison between the multi-arched tunnel and the small-spacing tunnel based on finite element analysis

文章采用分析对比的方法,对Ⅴ类围岩下的相同埋深、支护的条件下的小净距隧道和连拱隧道施工全过程,应用ANSYS有限元程序进行模拟研究。根据2种类型隧道的应力、应变和位移,在不同工况下的对比分布规律,证实小净距隧道在位移和应力方面均优于连拱隧道,从而为隧道设计提供参考依据。

A comparative study of the multi-arched tunnel（MAT） and the small-spacing tunnel（SST） is carried out by applying the ANSYS software. The construction process of the tunnels which pass through the V-type surrounding rock mass at the same depth under the same supporting conditions is simulated. The stress and displacement distributions of the tunnels under different construction conditions are analyzed. The SST is superior to the MAT in both displacement and stress.