华中科技大学学报（自然科学版）2016，Vol.44Issue(5)：87-92,6.DOI:10.13245/j.hust.160516
非饱和地基路堤临界填筑高度及参数分析
Critical filling height of embankment on unsaturated ground and parametric analysis
摘要
Abstract
For the trapezoid embankment on unsaturated ground ,some basic assumptions about the calculation of critical filling height were proposed .Then ,with consideration of unsaturated character‐istic of ground soils and actual lateral pressure coefficient ,analytical formulae for both critical load of foundation and critical filling height of embankment were presented under uniform and linear distribu‐tions of matric suction .The obtained analytical formulae which had good comparability were validated by comparing with practical embankment ,and also the necessity of given applicable conditions was highlighted .Parametric studies show that all the effects of matric suction and its distribution ,lateral pressure coefficient and suction angle on the critical filling height are significant ;the embankment de‐sign based on the saturated soil mechanics neglecting unsaturated characteristics of ground soils is con‐servative;the effect of uniform suction is more obvious than that of linear suction;a real lateral pres‐sure coefficient shold be selected to meet the applicable conditions of analytical formulae ,and the effect of suction angle is closely related to matric suction and its distribution .关键词
路堤/填筑高度/非饱和特性/侧压力系数/基质吸力Key words
embankment/filling height/unsaturated characteristic/lateral pressure coefficient/ma-tric suction分类
交通工程引用本文复制引用
张常光,张成林,晏青..非饱和地基路堤临界填筑高度及参数分析[J].华中科技大学学报（自然科学版）,2016,44(5):87-92,6.基金项目
国家自然科学基金资助项目（41202191）；陕西省自然科学基础研究计划资助项目（2015JM4146）；中国博士后科学基金资助项目（2014M562358）；陕西省博士后科研基金资助项目． （）
