连拱隧道两种工法的施工力学分析

RESEARCH ON CONSTRUCTION MECHANICS OF TWO KINDS OF CONSTRUCTION METHOD OF DOUBLE-ARCH TUNNEL

目前在连拱隧道施工中均不同程度地出现了围岩坍塌、已修筑的衬砌产生大面积裂缝等问题。为此 ,本文通过有限元方法对渝怀线金洞隧道出口段连拱隧道两种不同施工方法下的洞周位移、衬期支护的内力、安全系数等进行了分析 ,得出一些有意义的结论 ,可作为连拱隧道施工时参考。

At present,rock collapse in the construction of double-arch tunnel.Problems of large area crack exist in linings.In this paper author analyses the mechanics of two different construction methods of double-arch tunnel including displacement,force of principal support and safety factor,come to some conclusion,which can provide some reference on construction of double-arch tunnel.