【摘要】 本文根据断续裂隙岩体的损伤机制 ,建立了三维弹塑性损伤本构模型反映裂隙岩体的损伤变形特性。考虑断续裂隙岩体的岩锚支护效应 ,建立了空间损伤锚柱单元模型模拟锚杆的支护效果。最后将建立的模型应用于溪洛渡水电站地下厂房 ,进行了洞室群开挖弹塑性损伤及岩锚支护三维非线性有限元计算 ,获得了一些有益的工程结论。更多还原

【Abstract】 In this paper, A 3 D elastoplastic damaged constitutive model is established to reflect damage deformation properties of intermittent jointed rockmass according to damage mechanism of jointed rockmass. Through condsidering rock bolt supporting effect for jointed rockmass, we establish a cylindrical damage rock bolt element model to simulate reinforcing effect of anchor bar. Finally, we apply models proposed in this paper to underground power house of XILUODU hydroelectric station to carry out 3 D nonlinear calculation of elastoplastic damage and rock bolt supporting under excavation action and obtain some useful conclusions of project.更多还原