摘要
对缓倾角层状岩体中的大型地下厂房施工力学行为进行了综合研究.详细分析了开挖过程中主厂房围岩不同部位(包括顶拱、上下游边墙)的现场监测资料,并借助基于非连续介质理论的离散元程序UDEC,综合分析了围岩的变形特征、剪位移分布、围岩应力分布、塑性区分布和锚杆轴力分布等岩体力学行为.结果表明,结构面(如软弱夹层、层面和节理裂隙等)是控制围岩变形的主要因素,软弱夹层的存在控制了围岩剪位移、应力和塑性区的分布,是导致锚杆轴力增大的主要因素,实时监测资料和理论计算成果吻合良好.
Constructional mechanical behavior a huge underground powerhouse situated at layered rock mass was analyzed. Site monitoring material of the underground powerhouse at various parts of the rock mass, such as the crown, the upstream and downstream side wall of the cavern, were carefully analyzed, and UDEC program, a kind of software based on the discontinuous medium theory, was used to research on the deformation character, distribution of shear displacement, stress, plastic zones and anchor of rock mass. The results indicate that the discontinuous surface such as weak interlayer, bedding plane and joints are the major factors which control the deformation of the rock mass, the existence of weak interlayer influenced the distribution of shear displacement, stress and plastic zones, which is also a major factor result the axial forces increased rapidly during construction. The site monitoring results agrees well with numerical calculation.
出处
《湖南科技大学学报（自然科学版）》
CAS
北大核心
2010年第1期47-54,共8页
Journal of Hunan University of Science And Technology：Natural Science Edition
基金
国家自然科学基金重大研究计划资助项目(50490272)
关键词
地下厂房
层状岩体
现场监测
UDEC
软弱夹层
underground powerhouse
layered rock mass
site monitoring
UDEC
weak interlayer
