双向土工格栅与中砂界面作用特性试验研究  

On the Characteristics of Interface Action between Two-Way Geogrids and Medium Sand

作　　者：王建秀[1,2] 黄天荣[2] 

机构地区：[1]同济大学岩土及地下工程教育部重点实验室.上海200092 [2]同济大学地下建筑与工程系,上海200092

出　　处：《建筑材料学报》2013年第4期657-662,共6页Journal of Building Materials

基　　金：国家自然科学基金资助项目(41972205)

摘　　要：筋材与填料土(筋土)的界面作用特性是影响加筋土工程的重要因素.以中砂为填料土,以聚丙烯双向土工格栅为筋材,通过直剪与拉拔试验,研究了不同中砂含水率、试验盒尺寸、试验类型对筋土界面作用特性的影响.引入黏聚力对比参数λc与内摩擦角对比参数λφ,进行了不同影响因素下加筋土黏聚力c与内摩擦角φ的定量对比.结果表明:不同因素对黏聚力c的影响均大于对内摩擦角φ的影响,加筋对复合土体的贡献主要体现在黏聚力上.各因素对筋土界面作用特性影响的顺序为:试验类型>含水率>试验盒尺寸.The characteristic of interface action between reinforcement and soil was investigated by a series of pull-out and direct shear tests by using reinforced soil consisting of medium sand and two-way polypro pylene geogrids. The factors affecting the characteristics of interface action between reinforcement and soil were discussed by using different water content（by mass） of soil, different size of test box, and different test type. Based on comparative parameter ; of cohesive force and ）., of internal friction angle, the quanti tative comparison of c and cF at different factors were also conducted. It is concluded that the influence of those factors on cohesive force c is superior to that of internal friction angle, the contributions of rein forcement are mainly to the cohesive force c, and the sequence of influences of those factors is test type, water content of soil, and size of test box. The results should be a guide to the test, design and construc tion of reinforced engineering.

关 键 词：双向土工格栅 中砂 界面作用特性 影响因素 定量对比 

分 类 号：TU599[建筑科学—建筑技术科学]