施工技术2017年1月上 54CONSTRUCTION TECHNOLOGY第46卷第1期 DOI;10. 7672/sgjs2017010054 不同筋材界面剪切试验研究* 李丽华"”，高萌"，罗诗哲，陈艳君"，石安宁"，文贝 （1.湖北工业大学土木建筑与环境学院，湖北武汉430068； 2.中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室，潮北武汉430071) 【摘要］为了研究废旧轮胎、土工格室和土工格栅3种不同土工合成材料的筋-土界面抗剪特性，对试样开展了一系 列大型直剪试验。
对比了3种筋材的加筋效果，并研究了竖向荷载对筋-土界面抗剪强度和剪应力-剪切位移曲线 特征的影响。
试验结果表明：筋-土界面的剪切应力与剪切位移关系为非线性；几种不同筋材加筋效果较为显著， 其中废旧轮胎的加筋效果最为明显；筋-土界面的黏聚力提高较大，内摩擦角变化相对较小，表明筋-土界面主要依 靠提高黏聚力增大其抗剪强度。
确定了各筋材加筋界面抗剪强度指标，并分析了3种筋材的加筋机理。
[关键词］直剪试验；土工合成材料；剪切特性；试验 [中图分类号】TU458[文献标识码】A[文章编号】1002-8498(2017)01-0054-04 Study onCharacteristics ofDifferent Geosynthetics and SandInterfaceinDirectShearTest Li Lihua'²,Gao Meng',Luo Shizhe',Chen Yanjun', Shi Anning',Wen Bei' (1.Institute ofCivilEngineering andArchiecture,HubeiUniversity ofTechnology,Wuhan，Habei430068,China; 2.State Key Laboratory of Geomechanics and Geotechnical Enginering，Instiuteof Rock and Soil Mechanis, Chinese Academy of Seiences，Wuhan,Hubei 430071,China) Abstract:In order to study on the interface shear characteristics between reinforcement materials and soil of three kinds of geosynthetics include the scrap tire,geocelland the geogrid,a series of large-scale direct shear test are conducted on the samples. The reinforcement effect of three kinds of reinforcement materials are pared，and the interface between reinforcement materials and soil direct shear strength characteristics and shear stress-displacement characteristics of geosynthetics under different vertical stresses are analyzed paratively. The result shows that, the relationship curve of shear stress- displacement of the interface between reinforcement materials and soil is nonlinear,the reinforcement effect of several reinforced materials are great and the most significant effect of material is serap tire. The cohesive force of the interface between reinforcement materials and soil increased greatly， paratively the friction angle changes less,indicated that the shear strength improved mainly by inereasing cohesion of the interface ...
