论文部分内容阅读
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.
The research on construction mechanics behavior of large-scale underground powerhouse in bedded rock mass is comprehensively studied.The on-site monitoring data of different parts of surrounding rock of main plant (including roof arch and upstream and downstream side walls) during excavation are analyzed in detail. The discrete element program UDEC based on the discontinuous medium theory comprehensively analyzes the deformation characteristics of rock mass, the shear displacement distribution, the stress distribution of surrounding rock, the distribution of plastic zone and the axial force distribution of rock bolts. The results show that the structural plane Such as weak interbeds, fractures and joints) are the main factors that control the deformation of surrounding rock. The presence of weak intercalations controls the distribution of displacement, stress and plastic zone of the surrounding rock, which is the main factor leading to the increase of axial force of the anchor. The monitoring data and theoretical calculation are in good agreement.