期刊论文

Experiment on Seepage Characteristics of Unsaturated Soil Under Rainfall Infiltration

中文

中国公路学报

1001-7372

2018

31

2

191-199

10.19721/j.cnki.1001-7372.2018.02.020

51578079:国家自然科学基金 51508040:国家自然科学基金 51678074:国家自然科学基金 51378082:国家自然科学基金 17B013:湖南省教育厅优秀青年项目 kfj160601:实验室开放基金 2016SK2023:湖南省重点研发计划项目

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设计了一种可测量降雨入渗与底部排水条件下土体体积含水率与基质吸力变化规律的试验装置,开展不同降雨强度条件下砂土和粉质黏土的降雨入渗与排水过程室内模型试验,得到了不同土质在不同降雨强度下各高程处体积含水率与基质吸力的变化规律。结果表明:可将降雨入渗条件下不同土质的体积含水率变化划分为3个阶段,首先表面土体含水率上升,随着雨水的入渗,表面含水率保持不变,土体内部含水率由上至下依次上升,随后当浸润线达到装置底部后,土体的含水率开始逐渐增大,由非饱和状态过渡至饱和状态,最后当装置底部达到饱和后,土体中的水位开始逐渐上升,各个测点在降雨作用下由下至上依次达到饱和状态;不...

A experimental apparatus which was used to measure rainfall infiltration,the matric suction and volumetric water content of the soil under the condition of drainage from the bottom was designed.Indoor model test of rainfall infiltration and drainage on sand and silty clay under different rainfall intensity was carried out.The change law of volumetric water content and the matric suction of the different soil texture under different rainfall intensities were obtained.The results show that,firstly,variation of volumetric water content can be divided into three stages under the condition of rainf...