废旧轮胎条与格栅加筋土剪切性能对比研究  

Shear Comparison of Waste Tyres and Biaxial / Triaxial Geogrid Reinforced Soil

作　　者：李丽华[1,2] 崔飞龙[1] 肖衡林[1] 杨超[1] 任增乐 万畅[1] 

机构地区：[1]湖北工业大学土木工程与建筑学院,湖北武汉430068 [2]长江科学院,湖北武汉430010

出　　处：《人民黄河》2016年第2期117-120,共4页Yellow River

基　　金：国家自然科学基金资助项目(51308197;51178166);湖北省教育厅重点项目(D20151402);岩土力学与工程国家重点实验室开放基金资助项目(Z014011);湖北省桥梁安全监控技术与装备工程技术研究中心开放基金资助项目(QLZX2014016)

摘　　要：废旧轮胎在岩土工程中加筋的应用,与土工合成材料加筋原理比较相似。通过大型土工合成材料直剪仪,对废旧轮胎条与双向格栅、三向格栅加筋土剪切性能进行对比研究。试验结果表明:三种筋材的界面摩擦系数比均小于1,其中废旧轮胎条的界面摩擦系数比达到0.98,与素土界面摩擦系数最接近;三种筋材的加筋效果均较为显著,抗剪强度明显增大;不同加筋土内摩擦角与素土内摩擦角接近,但黏聚力显著提高,废旧轮胎条、双向格栅及三向格栅加筋土黏聚力增幅分别为24%、36%和60%;三种筋材加筋效果系数均随垂压增大而减小,相对于双向、三向格栅而言,废旧轮胎条加筋效果系数对垂压变化不太敏感。因此,在垂压变化较大的情况下,废旧轮胎条用作筋材优势较大。Waste tyres reinforced soil is applied for the geotechnical engineering, which the principle is similar to geosynthetic materials. Through large direct shear test, some conclusions could be obtained that interface friction coefficient ratio of several reinforcement materials was less than 1. Interface friction coefficient ratio of waste tyres was 0. 98, which was the closest to soil. Reinforcement effect of several reinforcement materials was great and shear strength significantly increased. The friction angle changed a little, but the cohesion force increased greatly. Cohesion growth of waste tyres, biaxial/triaxial geogrid reinforced soil were 24%, 36% and 60% respectively. Reinforcement effect coefficient of several reinforcement materials decreased with the increasing of the vertical pressure, but compared with the biaxial/triaxial geogrid, reinforcement effect coefficient of waste tyres was less influenced by the vertical pressure change. Therefore, when the case of the vertical pressure change is bigger, the waste tyres are better used as the reinforced material.

关 键 词：剪切性能 界面摩擦系数比 加筋效果系数 废旧轮胎条 加筋土 

分 类 号：TU411.7[建筑科学—岩土工程]