防灾减灾工程学报2018，Vol.38Issue(1)：118-123,192,7.DOI:10.13409/j.cnki.jdpme.2018.01.016
不同含水率状态下黏性土-混凝土界面剪切特性室内试验研究
Laboratory Experimental Study on Shear Behavior of Clayey Soil-concrete Interface under Different Moisture Conditions
摘要
Abstract
Based on a self-made constant-stiffness direct shear instrument designed by Qingdao University of Technology,direct shear tests were conducted on four types of clayey soil-concrete interface with water contents of 18％,20％,25％ and 28％.The shear stress-strain response was analyzed under different water contents and normal stresses,and the effect of water content on the properties of the clayey soil-concrete interface was discussed.Test results showed that water content affected the shear deformation of the clayey soil-concrete surface.When the water content was high,shear deformation exhibited a typical elasto-plastic deformation after the peak interface shear stress was reached.In contrast,when the water content was low the curve of interface shear stress versus shear displacement showed a shape of fold line.The interface shear strength decreased with the increase of water content,but a linear relationship held between shear strength and normal stress.The cohesion was affected by the critical water content of 25 ％;it increased with increasing water contents when the water content was less than the critical value.However,it decreased with increasing water contents while the water content was more than the critical value.Water contents exerted a limit impact on the frictional coefficient,whose variation was merely 5.5 ％.关键词
含水率/黏性土与混凝土界面/剪切特性/室内试验Key words
water content/clayed soil-concrete interface/shear behavior/laboratory experiment分类
建筑与水利引用本文复制引用
王永洪,张明义,白晓宇,刘俊伟,高强..不同含水率状态下黏性土-混凝土界面剪切特性室内试验研究[J].防灾减灾工程学报,2018,38(1):118-123,192,7.基金项目
国家自然科学基金项目(51078196 （）
41502304)、山东省重点研发计划项目(2017GSF16107)、山东省自然科学基金项目(ZR2016EEP06)资助 （2017GSF16107）
