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天然的坝基中总是存在不同程度的地质缺陷,坝基的加固处理是大坝建设的重要内容。应用三维有限元数值模拟方法,采用模拟岩石体渐进破坏过程的超载法和强度折减法,对含软弱夹层的拱坝坝基在加固前后的安全度给出了定量的结果,对加固措施的效果作出了定量的评价,并根据计算对比分析对加固设计进行细部优化,使其达到最佳效果,可为坝基加固处理设计提供直接依据。研究表明,通过采用有限元数值模拟方法,对坝基岩石体的安全性可以定量地做出评价,具有明显的优越性。
There are always some geological defects in the natural dam foundation. The dam foundation reinforcement is an important part of the dam construction. Applying the 3D finite element numerical simulation method, the overloading method and the strength reduction method, which simulate the gradual failure process of rock mass, are used to give the quantitative results of the safety of arch dam foundation with weak intercalation before and after reinforcement, and the effect of reinforcement measures is made The quantitative evaluation is carried out. According to the comparative analysis of the calculation, the detail design of the reinforcement design is optimized so as to achieve the best effect, which can provide a direct basis for the reinforcement design of the dam foundation. The research shows that the safety of dam rock mass can be evaluated quantitatively by adopting the method of finite element numerical simulation, which has obvious advantages.