废旧轮胎加筋路堤边坡模型试验研究  

THE MODEL TEST OF WASTE TIRE REINFORCED SLOPE

作　　者：李丽华[1,2] 肖衡林[1] 郑俊杰[3] 陈轮[4] 孙淼军[5] 孙龙[1] 杨超[1] 

机构地区：[1]湖北工业大学土木工程与建筑学院,武汉430068 [2]长江科学院,武汉430010 [3]华中科技大学土木工程与力学学院,武汉430074 [4]清华大学水沙科学与水利水电工程国家重点实验室,北京100084 [5]中国地质大学工程学院,武汉430074

出　　处：《工程力学》2015年第11期79-85,共7页Engineering Mechanics

基　　金：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项目(Z014011);国家自然科学基金项目(51308197;51178166)

摘　　要：废旧轮胎用于岩土工程加筋,不但可以消纳、处理大量的废旧轮胎,减轻废旧轮胎造成的环境问题,而且可以为大量的加筋土工程提供质优价廉的加筋材料。该文通过加筋边坡模型试验,对废旧轮胎加筋路堤边坡的应力、变形特性以及影响因素等加筋机理进行了探讨。试验结果表明,轮胎加筋对于路堤边坡的应力演化有显著影响,加筋路堤破坏时相对素土边坡没有出现明显整体变形破坏,应力值没有出现陡降;轮胎加筋可显著降低靠近轮胎单元体正下方及其附近砂土承担的竖向附加应力,且顶层加筋轮胎与加载板距离越小,附加应力值减小越明显;轮胎加筋对减小路堤沉降量效果明显,且荷载越大效果越显著;加筋路堤中,顶部轮胎层距离加载板越近、轮胎加筋层间距越小,路堤模型沉降越小,初始密度较小时,路堤加筋效果较好;路堤边坡加筋前后破坏形态存在明显差异,对于路堤边坡剪出口位置的影响较大,顶部轮胎位置对于路堤边坡破坏形态作用较明显。Waste tires can be used for soil reinforcement, providing high quality reinforcement at low prices with the advantage of reducing the environmental waste disposal costs. The stress, deformation characteristics and influence factors are discussed through a model test. Tire reinforcement has a significant effect on the evolution of the stress field in a slope. When the embankment model fails, the reinforced slope has little plastic flow and the stresses applied do not reduce rapidly. This type of reinforcement can significantly reduce the vertical additional stresses on backfill soil. Reinforced tires have a significant impact on reducing the settlement of an embankment, which is more obvious under larger loads. The vertical distance between the top reinforcement layer and the loading plate was also investigated, and it is correlated with the additional stress increase and playing an important role in reducing the settlement, especially in less initially dense soil. The failure modes of reinforced and unreinforced slopes are quite different, especially on the shear outlet position of the slope, again, influenced by the location of the top reinforcement layer.

关 键 词：废旧轮胎 加筋边坡 模型试验 加筋机理 应力-应变 

分 类 号：U416.14[交通运输工程—道路与铁道工程]