复杂地质条件下高拱坝地基加固效果分析

结合某高拱坝,根据其天然地基下非线性有限元分析结果,总结了地基中主要软弱结构面对岩体变形和受力的影响,由此提出了具体的加固措施。建立了加固后的三维有限元模型,考虑结构面的接触非线性特性和材料弹塑性进行了有限元计算,对比了加固前后的应力和位移结果,合理评价了工程处理的效果。计算结果表明,地基经过处理后,岩体和结构面的应力和变形特性得到一定程度的改善,地基岩体的变形稳定性也有所提高。

Analysis on reinforcement effect of high arch dam foundation under complicated geological condition

Combined with a high arch dam， the impacts from a weak structural plane on the deformation and stress of the rock body within its foundation are summarized herein in accordance with the result from a nonlinear finite element analysis made on its natural foundation， and then the specific reinforcement measures for it are proposed as well. In which， a 3-D three-dimensional finite element model for the dam after the reinforcement is established， a finite element calculation is made under the consideration of both the nonlinear property of the contact face and elastic-plastic performances of the materials， a comparison is carried out between the statuses of the stresses and deformations before and after the reinforcement and the effect of the engineering treatment is reasonably evaluated at last. The calculation results show that not only the stress-deformation properties of the rock body and the structural plane are improved to a certain extent， but the deformation stability of the foundation rock is also enhanced in a certain range.