【摘要】 为研究不同开挖尺寸对隧道开挖变形稳定的影响,应用MIDAS数值模拟软件,设定三种开挖尺寸,对硐室不同开挖尺寸下围岩的变形稳定情况进行数值模拟,结果表明随台阶长度增加,土体的沉降变大。适当缩短台阶长度有利于减小沉降,不同台阶长度对隧道的后期沉降影响更大,对掌子面前方土体进行预加固是控制沉降的有效措施。更多还原

【Abstract】 In order to study the influence of different size of excavation of tunnel excavation deformation and stability, using numerical simulation software MIDAS, setting three excavation size, simulating the deformation and stability of surrounding rock excavation under different size chamber by numerical simulation software. The results show that with the increase of the length of the step, the settlement becomes larger. The proper shortening of the step length is beneficial to reduce the settlement; the different step length has more influence on the settlement of the tunnel at the later stage. In front of the tunnel face is to control the settlement of soil reinforcement for good measure.更多还原