水利学报2017，Vol.48Issue(5)：623-630,8.DOI:10.13243/j.cnki.slxb.20160878
非饱和砂土抗拉强度的试验研究
Experimental investigation on tensile strength of unsaturated fine sands
摘要
Abstract
Tensile strength of soil plays an important role in controlling the cracking and tensile failure of many earth structures,such as core wall of earth-rock dam cracking,ground fracturing and hydraulic fracture.In order to study the tensile strength of unsaturated soils,the design value is derived for determining the inclination angle of inner sidewall of the specimen molds.Then an improved direct tensile test apparatus based on constant strain rate controlling nethod is developed to determine the tensile strength of fine sands over a broad range of water contents and with different dry densities.The results show that the tensile strength of fine sands significantly depends on dry density and water content.The tensile strength increases with the increase of dry density,and shows an "increase-decrease-increase" pattern with the increase of water content.关键词
抗拉强度/非饱和土/抗拉强度试验装置/含水率/干密度Key words
tensile strength/unsaturated soils/tensile strength test apparatus/water content/dry density分类
建筑与水利引用本文复制引用
蔡国庆,车睿杰,孔小昂,刘超,赵成刚..非饱和砂土抗拉强度的试验研究[J].水利学报,2017,48(5):623-630,8.基金项目
国家自然科学基金项目(51678041,51478135) （51678041,51478135）
北京市自然科学基金面上项目(8162032) （8162032）
