摘要
饱和土是指土体内的孔隙完全由水填充的土,而非饱和土则是指土体内的孔隙由水和空气填充的土.饱和土体应力-应变曲线特性研究基本成熟,已获多种土体本构关系,而非饱和土体应力-应变曲线特性研究尚显不足.本文利用GDS三轴仪测得围压值不变但基质吸力值变化和基质吸力值不变但围压值变化下的非饱和黏性土应力-应变实验数据,并将其整理绘制成应力-应变特性曲线,结果表明,非饱和黏性土围压值的增加可增加其承载力,而基质吸力值的增加可使其硬化.
Saturated soil is soil in which the pores in the soil are completely filled with water.Unsaturated soil refers to soil in which the pores in the soil are filled with water and air.The research on stress-strain curve of saturated soil is basically mature,and a variety of constitutive relations of soil have been obtained.However,the study of stress-strain curve of unsaturated soil is still insufficient.The stress-strain experimental data of unsaturated clay with constant confining pressure but constant matrix suction and changing confining pressure are obtained by using GDS tri-axial instrument,and the stress-strain characteristic curves are plotted.The results show that the increase of confining pressure of unsaturated clay can increase its bearing capacity,but the increase of matrix suction can make it harden.
作者
张文春
佟瑞向
上官云龙
ZHANG Wen-chun;TONG Rui-xiang;SHANGGUAN Yun-long(School of Geomatics and Prospecting Engineering,Jilin Jianzhu University,Changchun 130118,China)
出处
《吉林建筑大学学报》
2018年第6期30-33,共4页
Journal of Jilin Jianzhu University
