轮胎碎片加筋砂土路基承载力试验

摘要

废旧轮胎碎片与砂土混合使用，可以有效提高路基承载力，减小路基不均匀沉降。为了深入研究废旧轮胎碎片加筋路基工作机理，通过室内模型试验，利用数字照相无标点变形测量系统，结合地基土压力分布和 P－S 曲线，研究了废旧轮胎碎片加筋路基的加筋机理和破坏模式，研究结果表明，轮胎碎片加筋使土体位移场产生了显著的变化，有效的限制了路基浅部土体的水平位移，轮胎碎片含量为5％时，加筋效果较优。%Scrap tire chips mixed with sand,can effectively improve the subgrade bearing capaci﹣ty,reduce differential settlement of subgrade.In order to study fragments of scrap tires working mechanism of reinforced embankment.Through model tests,the use of digital photography without punctuation de﹣formation measurement system.Combined with soil pressure distribution and P -S curve.Study the rein﹣forcement mechanism of scrap tires and debris reinforced embankment failure mode.The results show,tyre pieces of reinforcement to displacement field of soil produced a significant change and effective limits the roadbed shallow soil horizontal displacement.When the tire debris content is 5%,subgrade has the best effect of reinforcement.