斜坡地基高填方路堤模型试验极限承载力数值分析  

Ultimate Bearing Capacity Numerical Analysis of Laboratory Model Tests for High Fill Embankments on Slope Foundation

作　　者：赵炼恒[1] 王志斌[2] 李亮[1] 但汉成[1] 刘项[1] 

机构地区：[1]中南大学土木建筑学院,长沙410075 [2]湖南科技大学土木工程学院,湘潭411201

出　　处：《武汉理工大学学报（交通科学与工程版）》2010年第3期488-491,共4页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：西部交通建设科技项目(批准号:2006318802111);铁道部科技研究开发计划重点资助项目(批准号:2008G032-3);湖南省交通厅科技项目(2007-29);中南大学优秀博士学位论文扶植项目(批准号:2008yb004)资助

摘　　要：在室内大型模型试验的基础上,建立了考虑室内试验试验模型槽和斜坡地基边界效应的FLAC3D数值计算模型,进行了极限承载力作用下斜坡地基高填方路堤变形至破坏的过程模拟,分析了斜坡地基上填方路堤承受极限承载力作用下的变形和破坏的物理力学行为,较为准确地预测了极限承载力作用下室内模型的典型破坏面形态与位置,能为充分认识斜坡地基上高填路堤的破坏形式与破坏机理提供有益素材.In order to predict and evaluate the ultimate bearing capacity-displacement mechanical responds of the high fill embankments on slope foundation in mountainous areas,a series of full-scale indoor model testes were constructed within the model slot.A FLAC3D numerical model,in which the boundary effects of the model slot and the slope foundation and the parameters selection were synthetically considered,is developed to simulate and analyze the ultimate bearing capacity-displacement mechanical responds and the failure mechanisms of full-scale high fill embankments on slope foundations models.And the results of the FLAC3D numerical models were shown to give satisfactory agreement with measurements taken during each full-scale indoor physical model tests,and the model tests and numeric calculation results can be used in research and study the instability morphology and sliding mechanism of the high fill embankments on slope foundations in mountainous region.

关 键 词：山区斜坡地基 高填方路堤 大型室内模型试验 极限承载力 失稳形态 数值分析 

分 类 号：U416.12[交通运输工程—道路与铁道工程]