单拱四车道公路隧道施工方法的三维数值研究  

Three-dimensional Numerical Simulation for Construction Method of Single-arch Four-lane Road Tunnel

作　　者：黄阜[1] 黄波[1] 杨小礼[1] 

机构地区：[1]中南大学土木建筑学院,长沙410075

出　　处：《湖南理工学院学报（自然科学版）》2009年第3期77-81,共5页Journal of Hunan Institute of Science and Technology(Natural Sciences)

基　　金：交通部西部建设科技项目资助(No.200631878557)

摘　　要：单拱四车道公路隧道由于跨度特大、断面形状扁平、施工方法复杂,造成其在施工过程中应力分布不均匀,拱脚应力集中,从而极易导致围岩发生失稳乃至坍塌.利用大型有限差分软件FLAC3D对单拱四车道隧道在不同围岩条件下采用不同施工方法的施工动态过程进行三维数值模拟,得到了各种施工方法下隧道围岩应力、位移和塑性区的力学特征.通过比较分析这些力学特征,得出了不同围岩条件下最合适的施工方法.Due to the super-span, flat section shape and complex construction method of single-arch four-lane road tunnel, the stress distribution is non-uniform, and stress concentration appears in arch foot during construction, which leads to instability or even collapse of the surrounding rock. Using finite difference software FLAC3D, dynamic construction processes of different construction method on different surrounding rock condition for single-arch four-lane road tunnel are simulated, and mechanical characteristics of stress, displacement and plastic zone for various construction methods are obtained. By comparing these mechanical characteristics, the most appropriate construction method for different surrounding rock condition is proposed.

关 键 词：单拱四车道公路隧道 数值模拟 施工方法 力学特征 

分 类 号：U45[建筑科学—桥梁与隧道工程]