计算力学学报Issue(3)：332-338,7.DOI:10.7511/jslx201503006
某深埋隧道围岩破裂发展机理数值模拟
Numerical analysis of rupture development mechanism for surrounding rock on digging within deep tunnel
摘要
Abstract
This paper focuses on a study of failure mechanisms of a deep-buried tunnel supporting struc-ture.Firstly,the geology of surrounding rock of a deep-buried tunnel and supporting structural failure characteristics were investigated.According to the deep tunnel rock geomechanical history,the plastic strain indicators of post-peak mechanical characteristic description of rock mass were proposed.Secon-dly,the stress alternate distribution and layered fracture phenomenon of surrounding rock under excava-tion were obtained by numerical simulation method,and an analysis of the mechanical mechanism on the formation of secondary free-surface and multiple excavation surface in layered fracture phenomenon. Finally,the reason why the supporting structure of Wuling mountain deep-buried tunnel section damaged is revealed to be the layered fracture of surrounding rock.The results provide an effective ideas and approach for supporting design and stability analysis of the deep-buried tunnel.关键词
深部隧道/分层断裂/应变软化/峰后脆性/力学机制Key words
deep-buried tunnel/layered fracture/strain-softening/peak-brittleness of rock/mechanical-mechanism分类
建筑与水利引用本文复制引用
苏永华,刘少峰,毛克明,贺炜..某深埋隧道围岩破裂发展机理数值模拟[J].计算力学学报,2015,(3):332-338,7.基金项目
国家自然科学基金(51378195,51078136)资助项目 （51378195,51078136）
