黑龙江科技大学学报2016，Vol.26Issue(6)：700-704,5.DOI:10.3969/j.issn.2095-7262.2016.06.023
一维稳态流下非饱和土主动土压力强度计算模型
Active earth pressure strength model of unsaturated soil
摘要
Abstract
This paper highlights a novel calculation model for the active earth pressure strength in unsaturated soil,which responds to the way the water content in homogeneous unsaturated soil varies along vertical direction.The model is developed by identifying the water content vertical distribution function and the coefficient of active earth pressure and deducing overlying soil heavy and cohesion vertical distribution function,using the Rankine active earth pressure strength formula,coupled with the relationship model between soil gravity density,water content and total shear strength parameters in unsaturated soil layer.The paper is focused on the calculation and analysis of the law underlying the vertical distribution of active earth pressure strength,together with active earth pressure coefficient in unsaturated silty clay layer,when flow directions vary from infiltration to static water to evaporation.The results demonstrate that active earth pressure coefficient behaving in different flow direction exhibits a nonlinear decrease with an increasing depth;the minimum coefficient occurs in the active earth pressure when the flow direction is infiltration,followed by hydrostatic condition and the evaporation condition is maximum;the decreasing differences in active earth pressure coefficient depends on the increasing depth;the active earth pressure strength is governed by a nonlinear increase due to an increasing depth,and the flow direction exerts a smaller effect on active earth pressure strength.关键词
主动土压力强度/主动土压力系数/非饱和土/含水率/铅直分布Key words
active earth pressure strength/coefficient of active earth pressure/unsaturated soil/water content/vertical distribution分类
建筑与水利引用本文复制引用
陈茜,郭光玲..一维稳态流下非饱和土主动土压力强度计算模型[J].黑龙江科技大学学报,2016,26(6):700-704,5.基金项目
中央高校基本科研业务费专项资金项目(310829151076) （310829151076）
