基于DDA方法的膨胀土边坡稳定性研究
摘要:非连续变形分析方法(DDA)是近年来发展起来的数值计算方法,其以新颖的思想、先进的数值技术,得到了学术界的认可和广泛关注。针对宁明高速公路膨胀土路堑边坡破坏的特点,建立地质模型和计算模型,编制了二维DDA程序,对DDA理论模型进行了推广和发展,将非饱和土的本构模型引入程序。对非连续变形分析方法中的控制参数设置进行了探讨,应用DDA程序模拟了膨胀土边坡破坏特征。程序计算结果与工程实际情况比较吻合,验证了程序的合理性和有效性,分析成果可为设计、施工提供参考依据。
Abstract:Discontinuous deformation analysis (DDA) method is a newly developed numerical method and has gotten widespread attention and approval of many scholars in geotechnical engineering because of its advanced principle and numerical simulation technique. Geological model and mathematical model were established based on the damage characteristics of expansive soil cutting slope of Ningming highway. 2D model was established and theory system of the discontinuous deformation analysis method was developed. Constitutive theory of unsaturated soil was used and control constants were discussed. Then, DDA procedures were used to simulate the damage characteristics of the expansive soil slope. The results matched with the actual situation, and thus shows the procedures is rationality and effectiveness, Its results can he used for design and construction.
中文标题：
基于DDA方法的膨胀土边坡稳定性研究
Stability Study of Expansive Soil Slope Based on Discontinuous Deformation Analysis
作者：
安彦勇1,2,林育梁3,徐艳华3
An Yanyong1,2,Lin Yuliang3,Xu Yanhua3
作者简介:安彦勇,1980年生,男,河北石家庄人,博士研究生,主要从事特殊性岩土基本性质研究。E-mail:anyanyong@sina.com
通讯地址：
1. 河海大学岩土力学与堤坝工程教育部重点实验室, 江苏南京 210098; 2. 河海大学岩土工程科学研究所, 江苏南京 210098; 3. 广西大学土木建筑工程学院, 广西南宁 530004
1.KeyLaboratoryofGeomechanicsandEmbankmentEngineeringofMinistryofEducation,HohaiUniversity,Nanjing210098Jiangsu; 2.ResearchInstituteofGeotechnicalEngineeringandScience,HohaiUniversity,Nanjing210098,Jiangsu; 3.CollegeofCivilandArchitecturalEngineering,GuangxiUniversity,Nanning530004,Guangxi,China
中图分类号:TU443
出版物：岩土工程技术
收稿日期:2008-12-08
关键词:膨胀土,边坡稳定性,非连续变形分析
Key words:expansive soil,slope stability,discontinuous deformation analysis （DDA）
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