黄土边坡二维和三维变形破坏模型的对比分析

摘要

Slope deformation characteristic＇s importance in stability prediction is obvious. The existent documents stud- ied 2D or 3D model only, neglecting the respective effect of them, thus model selection is in no accordance with the problem. To this problem,Study-group used ADINA to establish 2D and 3D model and compare them to the worksite based on one loess slope reinforcement. The results show：these two models have a similar result on trend of slope de- formation;the deformation prediction values of 3D is 30% to 100% higher than 2D, obtaining characteristic-oriented and quantity-oriented result respectively,3D model is more actual;the most weak positions predicted by simulation are in accordance with the worksite,it＇s practical. These conclusions provide references for model selection of loess slope deformation prediction and reinforcement.%边坡变形特征在稳定性预测中尤为重要，已有文献往往只局限于二维或三维分析，没有对两者加以比较，导致模型选择与分析的问题不一致，浪费了时间和金钱。针对这个问题，课题组以某黄土边坡加固为例，运用ADINA软件建立二维和三维模型进行模拟，并与现场实际对照。结果表明：两种模型对边坡变形趋势的分析结果一致；三维模型变形预测值大于二维模型的30％～100％，分别得出定性和定量的结果，三维模型更符合实际变形；两种模型预测出的最薄弱部位和现场实际一致，具有实用性。这些结论为黄土边坡的变形预测和加固分析模型的选择提供了参考依据。