华南地震2024，Vol.44Issue(1)：157-164,8.DOI:10.13512/j.hndz.2024.01.18
含水率对残积土与土工织物界面剪切特性的影响
Effect of Moisture Content on the Shear Characteristics of the Interface Between Residual Soil and Geotextile
摘要
Abstract
In order to investigate the shear characteristics of the interface between residual soil and geotextile under different influence factors,the direct shear tests were carried out on the residual soil samples reinforced with geotextile by using pneumatic direct shear apparatus.Considering moisture content,shear rate,vertical stress and other factors,the effect of moisture content on the shear characteristics of the interface between residual soil and geotextile under different shear rates and vertical stresses is analyzed.The test results show that the shear strength of the reinforced soil interface is proportional to the vertical stress under the same moisture content,and when the moisture content is 17%,the shear strength of the vertical stress of 50 kPa increases from 53 kPa to 84 kPa(100 kPa)and 151 kPa(200 kPa),respectively.With the increase of moisture content,the apparent cohesion and shear strength of the reinforced soil interface decrease significantly,but the friction angle of the soil interface has no obvious change.The shear rate mainly affects the friction angle of the reinforced soil interface,and the shear strength of the reinforced soil interface increases with the increase of shear rate.In the case of high shear rate and low moisture content,the shear shrinkage of the interface is relieved after reaching a certain shear displacement,and finally tends to be stable.关键词
加筋土/筋土界面/直剪试验/抗剪强度/含水率Key words
Reinforced soil/Interface between geogrid and soil/Direct shear test/Shear strength/Moisture content分类
建筑与水利引用本文复制引用
冯忞,宋文捷..含水率对残积土与土工织物界面剪切特性的影响[J].华南地震,2024,44(1):157-164,8.基金项目
国家自然科学基金资助项目(51678352) （51678352）
