有限元极限平衡法在水利工程中的应用

发布时间：2018-04-28 16:18

本文选题：有限元极限平衡法 + 传统平衡法　；参考：《大连理工大学》2016年硕士论文

【摘要】：本文基于有限元极限平衡法和传统极限平衡法,利用Geo-Studio岩土工程分析软件和stab边坡稳定分析程序,对糯扎渡砾石心墙堆石坝的典型剖面,分别采用线弹性模型和非线性弹性模型,对渗流稳定期、水位骤降期、竣工期三种工况进行了坝坡稳定分析计算。根据计算结果对两种算法及两种本构模拟进行了分析对比,结果显示：利用有限元极限平衡法计算得到的坝坡最小安全系数较极限平衡法计算结果稍小。这表明,有限元限平衡法分析边坡稳定时是适用的；该方法通过求得滑裂面的应力应变分布,真实的模拟了边坡滑体的滑动,其计算结果偏于安全且；采用土的非线性本构计算结果与采用土的线性本构计算结果相差较大,这表明,在分析边坡稳定分析时,对高坝考虑土的非线性特性是必要的。
[Abstract]:Based on finite element limit equilibrium method and traditional limit equilibrium method, the typical section of Nuozhadu gravel core rockfill dam is studied by using Geo-Studio geotechnical engineering analysis software and stab slope stability analysis program. By using linear elastic model and nonlinear elastic model, the stability analysis of dam slope is carried out under three conditions: seepage stability period, water level plummeting period and completion period. According to the calculation results, the two algorithms and the two constitutive simulations are analyzed and compared. The results show that the minimum safety factor of dam slope calculated by the finite element limit equilibrium method is slightly smaller than that of the limit equilibrium method. The results show that the finite element method is suitable for slope stability analysis, and the stress and strain distribution of the slip surface can be obtained by the finite element method, and the calculated results are relatively safe and safe. The difference between the results of nonlinear constitutive calculation of soil and that of linear constitutive calculation of soil shows that it is necessary to consider the nonlinear characteristics of soil in the analysis of slope stability.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TV223

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