基于ADINA的软土坝基沉降分析  

FINITE ELEMENT ANALYSIS OF SETTLEMENT OF SOFT SOIL FOUNDATION UNDER RESERVOIR DAM

作　　者：杨坪[1] 杨军[2] 许德鲜 肖异智 

机构地区：[1]同济大学岩土工程重点实验室 [2]广州市市政工程设计研究院,广州510060 [3]西北综合勘察设计研究院,西安710003 [4]舟山市水利勘测设计院,舟山316000

出　　处：《工程地质学报》2008年第4期533-538,共6页Journal of Engineering Geology

基　　金：上海市博士后科研基金资助项目(05R214145)

摘　　要：为了预测拟建软土坝基的沉降量,弄清软土坝基的沉降规律及孔隙水压力的消散规律,本文采用有限元分析程序,对大坝软土坝基的沉降进行了分析研究。研究结果表明:大坝的沉降经历了初始沉降、快速沉降和缓慢沉降3个阶段;通过分析,获得了坝基的沉降规律为Hill模型,孔隙水压力的消散规律为指数衰减Expdec2模型,并得出了坝基的沉降量、附加沉降量及水平位移值,为大坝建设和类似坝基沉降预测提供了有价值的参考。It is to predict the settlement of soft soil foundation under reservoir dam and to study the law of settlement of soft soil foundation and the law of dissipation of pore water pressure. A plane - strain FEM model was established to analyze the settlement of soft soil foundation for reservoir dam. The results showed that the settlement of soft soil foundation included initial stages, quick stages and slow stages. The laws governing the settlement and the dissipation of pore water pressure could be described with the Hill model and the Expdec2 model, respectively. The maximum of settlement and the additional settlement due to dam mass and the maximum of horizontal displacement were obtained. The results can offer an important reference to the construction of dam and the subsidence of similar soft soil foundation.

关 键 词：ADINA 坝基 沉降 孔隙水压力 

分 类 号：TU472[建筑科学—结构工程]