高速铁路低矮路堤灰土桩复合地基的动力特性分析  

Analysis on Dynamic Characteristics of Lime-soil Pile Composite Foundation of Low Embankment along High-speed Railway

作　　者：康文生 

机构地区：[1]中铁第五勘察设计院集团有限公司,北京102600

出　　处：《路基工程》2012年第3期36-38,42,共4页Subgrade Engineering

基　　金：国家自然科学基金(11072255);交通部西部交通建设项目(2009318802074);浙江省重大科技专项(2009C13010)

摘　　要：利用有限元软件MIDAS/GTS,分别建立了灰土桩复合地基和未经处理的黄土地基上铁路路基的三维有限元模型,用轨道不平顺法模拟列车荷载,分析计算了在不同速度列车荷载作用下不同路堤高度下地基土中动应力的分布,得出了桩土应力比的变化规律和地基瞬时变形规律。Using finite element software MIDAS/GTS, the three-dimensional finite element models for railway subgrade on both lime-soil pile composite foundation and untreated loess foundation are established respectively. Through simulating train load through the use of track irregularities, dynamic stress distribution in foundation soil thatg in different embankment heights and under the action of train load at different velocities is analyzed and calculated, and then the change law of pile-soil stress and instantaneous deformation law of foundation are obtained.

关 键 词：路基工程 复合地基 低矮路堤 三维有限元 动力特性 

分 类 号：TU472.32[建筑科学—结构工程]