摘要
目前,岩壁吊车梁设计所采用的刚体极限平衡设计方法还不能确切反映岩锚吊车梁的实际受力状态。有限元法是分析研究岩壁吊车梁较为有效而应用广泛的一种方法,围绕岩壁吊车梁有限元法中的关键技术问题开展系列研究工作。根据岩壁吊车梁的受力机制,建立相应的力学模型、安全度计算公式,研究吊车梁网格尺度、模型范围、初始应力场、锚杆套筒长度以及围岩类别等因素对有限元结果的影响,同时还研究开挖释放应力和运行期轮压作用对岩壁吊车梁的双重效应。主要研究成果已被《地下厂房岩壁吊车梁设计规范》(送审稿)及条文说明所采用。
At present, the rigid-body limit equilibrium method adopted in the design of crane beam on rock wall can not reflect the actual mechanical behavior of crane. Finite element method is a broadly used effective approach to the analysis of crane beam on rock wall. The authors will focus on a few key technical problems, and complete a series of relevant research work. According to mechanical behavior of crane beam on rock wall, the relevant mechanical model and estimation formula of safety are established; some factors influencing on the results of finite element method are also studied, such as the mesh size, model range, length of anchor-bolts sleeve, classes of surrounding rocks, in-situ stresses etc.; and the double effect of excavation release stress in construction period and wheel pressure in working period are studied too. The main achievement has been quoted by Design Criterion of Crane Beam on Rock Wall for Underground Powerhouse（draft） and explanation items.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2008年第10期2124-2129,共6页
Chinese Journal of Rock Mechanics and Engineering
关键词
数值分析
岩壁吊车梁
受力机制
有限元法
安全度
numerical analysis
crane beam on rock wall
mechanical behavior
finite element method
safety degree
