裂隙岩体渗流场与损伤场耦合模型研究

Theoretical study on a coupled seepage-damage model for fissured rock masses

基于能量互易定理并考虑裂隙扩展过程中的能量转换和裂隙扩展过程中的相互作用,探讨了裂隙岩体在复杂应力状态下本构关系与损伤演化方程,给出了渗透张量随裂隙损伤发展的关系,从而建立了多裂隙岩体渗流场与损伤场耦合分析模型.在此基础上,对三峡永久船闸高边坡稳定性进行分析.结果表明,左边坡相对于右边坡有更大的损伤演化区,应适当考虑左边坡的锚固和防渗措施.

Based on the Betti energy exchange theory, a study was made on the constitutive law and damage evolution equation of fissured rock mass in complex stress states and the variation of seepage tensor with crack evolution, with energy exchange and interaction considered in the process of crack development, then a coupled seepagedamage model was developed for analysis of multifissured rocks. By use of the model, a stability analysis was made of the high slope of the permanent ship lock in the ThreeGorges Project, and the results show that the damage evolution on the left side slope would be more serious than that on the right side slope, so anchors and measures for seepage control should be taken in the construction of the left side slope.