筋带-砂-粘土层状体系直剪试验研究  

Research on Direct-Shear Test for Reinforcement-Sand-Clay Layer System

作　　者：张波[1] 石明磊[1] 

机构地区：[1]东南大学交通学院,江苏南京210096

出　　处：《公路交通科技》2005年第7期55-57,74,共4页Journal of Highway and Transportation Research and Development

摘　　要：通过对粘土与聚丙烯土工带在不同含水量下进行不同法向荷载作用的直剪试验,讨论法向应力、含水量对高液限粘土与筋带之间剪切特性的影响;提出了筋带砂粘土层状布置体系的加筋土结构模型,得出了该层状体系对粘土加筋土结构具有显著改善功能的结论,试验结果表明,随着正应力的增加,筋土之间剪应力的增长不是线性的,似粘聚力随含水量的增加出现先增后减的趋势,似摩擦系数随含水量的增加而降低。<Abstrcat>Systematic direct-shear tests with large direct-shear apparatus were carried out for the clay reinforced by geobelf under different normal stresses and water content. Reinforcement-sand-clay layer system model which can improve the interface behavior dramatically was proposed. Based on the test result,stress-strain relationship was studied.The test results show that with the growth of vertical stress the increase of the shear stress between the reinforcement is nanlinear,and that with the increase of water content the quasi cohesive force will increase first then decrease,and the quasi friction co-efficient will be reduced.

关 键 词：高液限粘土 直剪试验 含水量 法向荷载 筋带-砂-粘土层状布置体系 

分 类 号：U416.03[交通运输工程—道路与铁道工程]