不同含水量条件下黄土及黄土—加筋带接触面力学性质对比试验研究

Comparative Test Study on the Mechanical Property of Loess and Loess-reinforced Belt Interface with Different Water Content

通过对不同含水量条件下两种干密度黄土以及黄土—加筋带接触面的直接剪切试验研究,对黄土本身和黄土—加筋带接触面极限抗剪应力与含水量、法向应力及干密度的变化关系进行了分析,结果表明塑限含水量是干密度对加筋效果起积极作用的界限含水量,且随法向应力和含水量增大,会出现黄土极限剪切应力小于相同法向应力条件下黄土—加筋带接触面极限剪切应力的现象,此现象不利于筋带加筋效果的发挥。

Based on a series of direct shear experiments of two kinds of dry density＇s loess and loess-reinforced belt interface with different water content,the relationship between loess,ultimate shear stress of loess-reinforced belt interface and water content,normal stress,dry density were analyzed.The analysis results indicate that plastic limit water content is the Atterberg limits whether the dry density has a positive effect on the reinforced belt.With the increasing of normal stress and water content,ultimate shear stress of loess-reinforced belt interface will be bigger than that of loess under the same normal stress.This phenomenon is adverse to reinforcement contribution of loess-reinforced belt interface.