斜洞衬砌荷载分布规律及内力分析

Load distribution regularity and internal force analysis of inclined cave lining

对于长水工隧洞,为加快工期,常采用施工平洞或斜洞等施工支洞,以增加施工作业面,加快施工进度。针对工程中斜洞的运用,依据相关规范,分析其在超浅埋、浅埋以及深埋条件下的荷载分布规律;并根据新奥法理论,对斜洞支护的二衬分别进行荷载不折减及荷载折减的有限元分析,分析结果显示两种情况下二衬内力有明显变化,经过复核计算表明按规范中选用二衬折减满足实际工程应用。

For the long hydraulic tunnel,the cave or inclined cave is always as the measure to accelerate the construction period or work face and speed up the construction progress. Using the relevant standard and basing on the inclined cave application in engineering,this paper analyzes the regularity of inclined cave which is under the conditions of super shallow buried,shallow buried and deep buried. According to the NATM theory,the finite element analysis carried out,with the second lining of the inclined cave on the load and the load reduction. It indicates that the internal force of second lining have obvious changes and giving results that the second lining on load reduction with the standard can satisfy the actual engineering by the review calculation.