废弃橡胶轮胎环箍的散体材料特性研究  

Study on the Properties of Granular Materials Confined by Waste Rubber

作　　者：王凤池[1] 董明[1] 王庆龙[1] 刘凤起[1] 

机构地区：[1]沈阳建筑大学土木工程学院,沈阳110168

出　　处：《地下空间与工程学报》2015年第4期884-888,共5页Chinese Journal of Underground Space and Engineering

基　　金：辽宁省科技攻关计划(2011222006);沈阳市科技计划项目(F11-264-1-23)

摘　　要：为了提高废弃轮胎路基使用性能和效果,研究了废弃轮胎环箍下的散体材料压实度和承载力。由于轮胎的侧限作用,轮胎内粉质黏土的最佳含水量比标准实验测定的最优含水量大,细砂的小于最优含水量。轮胎内散体材料的压实度一定范围内随着压实功的增加而增加,级配均匀的砂土在相同压实功的条件下干密度最高,取得最优的压实效果。轮胎的半径越大承载力越低;粗骨料填充的轮胎比细骨料填充的轮胎承载力高,但变形大。轮胎新旧对其内填散体材料的压实度和承载能力没有影响。由于散体材料的横向变形受到轮胎的约束,处于三向受压状态,因此提高了竖向载荷能力。In order to improve the performance and effect of waste tire subgrade,compaction degree and bearing capacity of the granular material confined by waste tire was studied. Due to the constraint effect of the tire,the optimal water content of silty clay in the tire is bigger than the optimum moisture content tested by standard experiment and that of fine sand is less than the optimal moisture content. The compaction degree of granular material within the tire increases with compaction energy. Evenly graded sand has the highest dry density under the same compacting conditions and the optimal compaction effect is achieved. Bearing capacity decreases with the tire diameter increasing. The tire filled with coarse aggregate has higher bearing capacity than that with fine aggregate,but the deformation is larger too. Whether the tire is waste or new has little influence on compaction degree or bearing capacity. Because the transverse deformation of granular material is constrained by the tire,the granular material is compressed in three directions,and the vertical load bearing capacity is improved

关 键 词：路基 废弃轮胎 压实度 承载力 

分 类 号：TU472[建筑科学—结构工程]