华中科技大学学报：自然科学版2012，Vol.40Issue(11)：53-57,5.
软弱破碎带隧道围岩变形及初期支护受力分析
Analysis of deformation of the surrounding rock and preliminary support stress in tunnels through weak and cracked strata
摘要
Abstract
Based on geological characteristics of the weak and cracked rock mass surrounding around Zhongtiaoshan tunnel, finite difference software was used to simulate the excavation process of bench method and centre-diaphragm method respectively. The deformation of surrounding rock (vault crown settlement and horizontal convergence displacement) and the stress of preliminary support system (first lining and bolt) under different excavation methods were compared. The results show that when the upper portion of the bench passes by, both deformation of surrounding rock and stress of prelimi- nary support are relatively large, centre-diaphragm method is better at controlling the surrounding rock displacement, but the advantage is not obvious for tunnels crossing weak and cracked rock mass, bench method is better than centre-diaphragm method in controlling the stress of preliminary support system.关键词
隧道/软弱破碎围岩/台阶法/单侧壁导坑法/初期支护Key words
tunnels/weak and cracked strata/bench method/centre-diaphragm method/preliminarysupport分类
交通工程引用本文复制引用
崔岚,郑俊杰,章荣军,余舜..软弱破碎带隧道围岩变形及初期支护受力分析[J].华中科技大学学报：自然科学版,2012,40(11):53-57,5.基金项目
山西省交通厅科技建设项目 （）
