【摘要】 基于连拱隧道分别在地形偏压与施工偏压条件下完成了数值模拟,并对中墙内力及变形情况进行了分析。研究中墙内力发现,在不同偏压条件下,中墙底截面弯矩、剪力均较大,故底截面应做为中墙内力的控制截面。此外,计算结果显示,在地形坡度约为1:1.4时,中墙弯矩、剪力发生突变,当坡度大于1:1.4时,其弯矩、剪力明显增长,故在设计中,应尽量避免超出这一坡度限值。更多还原

【Abstract】 Based on the finite element analysis of double-arched tunnel under terrain partial pressure and construction progress partial pressure separately,the deformation and mechanics of middle wall of double-arched tunnel are mainly analyzed in this paper.It is proposed in this paper that the bottom section of middle wall should be the controlled section for the design.Since the flexural and shear at the bottom section is larger than other parts. In addition,it is important to note that the middle wall is represented a remarkable change in the slope 1:1.4 nearby under the terrain partial pressure alone.When the slope is higher than 1: 1.4,the flexural and shear grows significantly.Therefore,it should be avoid exceeding this slope in design.更多还原