板岩质砂土-混凝土界面剪切特性研究  

Shear properties of interface between argillaceous slate sand and concrete

作　　者：周怡 彭振斌[1,2] 尹泉[3] 陈乐求 陈娟[5] 张闯 ZHOU Yi;PENG Zhenbin;YIN Quan;CHEN Leqiu;CHEN Juan;ZHANG Chuang(School of Geosciences and Info-Physics,Central South University,Changsha 410083,China;Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring,Central South University,Changsha 410083,China;School of Civil Engineering,Hunan City University,Yiyang 413000,China;Department of Construction&Engineering,Hunan Institute of Science and Technology,Yueyang 414006,China;School of Information and Electrical Engineering,Hunan University of Science and Technology,Xiangtan,411201,China)

机构地区：[1]中南大学地球科学与信息物理学院,湖南长沙410083 [2]中南大学有色金属成矿预测与地质环境监测教育部重点实验室,湖南长沙410083 [3]湖南城市学院土木工程学院,湖南益阳413000 [4]湖南理工学院土木建筑工程学院,湖南岳阳414006 [5]湖南科技大学信息与电气工程学院,湖南湘潭411201

出　　处：《中南大学学报（自然科学版）》2019年第9期2233-2241,共9页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51308210)~~

摘　　要：为了研究含水率对板岩质砂土?混凝土界面的力学特征参数的影响,采用大型直剪试验系统对不同含水率条件下的板岩质砂土?混凝土界面剪切特性进行试验。试验结果表明:随着板岩质砂土含水率的增大,界面的抗剪强度、摩擦角、剪切刚度系数和残余剪切强度等均显著减小,最大减小幅度达30%;黏聚力先缓慢增大后迅速减小,减小幅度为19.1%;而剪切破坏位移显著增大,增大幅度超过65%;含水率对板岩质砂土?混凝土界面的剪切强度、剪切刚度和剪切破坏变形等力学性质有显著影响。To study the influences of moisture ratio on the interface shear mechanical properties,large-scale direct shear tests were designed by using large-scale direct shear apparatus to test shear characteristics of interface between slate sand and concrete under different moisture ratio.The test results show that with the increase of moisture ratio,the shear stress strength,friction angle,shear stiffness coefficient and residual shear stress strength decrease remarkably,and the maximum reduction exceeds 30%.The cohesion first increases slowly,and then decreases rapidly by 19.1%.With the increase of moisture ratio,the shear failure displacement increase remarkably by 65%.The moisture ratio of the argillaceous slate sand has great influence on the shear strength,the shear deformation and the shear stiffness of the interface.

关 键 词：含水率 板岩质砂土 混凝土 界面剪切特性 

分 类 号：TU411[建筑科学—岩土工程]