摘要
采用冲击碾压技术对高填方路基进行冲压补强,测试分析路基在冲击碾压作用下相关力学参数的变化,以确定更优化的相关施工参数:主要考虑了冲压遍数对路基沉降变形、路基不同深度处压实度、路基填料最大干密度及整体强度的影响。结果表明:随碾压遍数的增加,路基沉降量增加,其增量曲线趋于收敛;碾压20～25遍可以起到对路基较好补强的作用,且可以以沉降率0.5%作为工程控制指标;碾压遍数大于10时路基压实度趋于均匀;同时土体干密度总体表现为随碾压遍数的增加而增大,并在碾压15遍后增长趋势逐渐减缓。
Adopting the impact compaction technology to reinforcing a high embankment,and testing and analysising the relevant mechanical parameters under impacting,the optimization construction parameters,the main consideration of the influence of impact times to the settlement of subgrade,compactness at different depths,dry density of filler and overall stability,were determined.The results indicated that the settlement increased as the impacting time raising,and the incremental curve tended to convergence.When the impact time be 20～25,the reinforcement could be better,then 0.5 percent rate of settlement could be token as the control index.When the impact time came to be 10,the compactness tended to be uniform.At the same time,the dry density of filler increased as the impact time raising,and the increases tended to be slow when the impact time comes to be 15.
出处
《交通运输工程与信息学报》
2011年第1期70-77,共8页
Journal of Transportation Engineering and Information
关键词
高速公路
高填方路基
冲击碾压
冲击碾压遍数
压实度
路基沉降
Highway,high embankment,impact roller compaction,number of impact roller passes,compactness,settlement of subgrade
