高速液压夯实机动力学模型试验  

Dynamic model test of high-speed hydraulic impactor

作　　者：刘本学[1,2] 郝飞[3] 张志峰[2] 冯忠绪[2] 

机构地区：[1]郑州大学机械工程学院,河南郑州450001 [2]长安大学道路施工技术与装备教育部重点实验室,陕西西安710064 [3]南京工程学院机械工程学院,江苏南京211167

出　　处：《长安大学学报（自然科学版）》2009年第1期95-98,共4页Journal of Chang’an University(Natural Science Edition)

基　　金：国家"863"计划重大项目(2001AA422013)

摘　　要：针对公路工程中台背填土处工后沉降引起的桥头跳车现象,设计了一种能改善工后沉降的高速液压夯实机。基于土壤力学的半空间理论,建立了高速液压夯实机与土壤的相互作用力学模型,并对高速液压夯实机的压实性能进行了试验研究。结果表明:压实度随着夯击次数的增加而增加;夯实6遍,绝对沉降量达到405 mm,土壤深度750 mm处压实度可达89%。In order to avoid the vehicle jump at the end of bridge, which is caused by the subgrade settlement at the joint of road and bridge, this paper designed a high-speed hydraulic impactor to compact the soil at the joint of road and bridge. Based on half-space theory of soil mechanics, the interaction dynamic model of soil and the impactor is built to study the compaction effect with experiment. The results show that the compaction degree is increased with the increasing of compacting numbers, the total settlement is 405 mm and the compaction degree is 89% under the depth of 750 mm when the compacting numbers are 6 times. 6 figs, 8 refs.

关 键 词：筑路机械 土壤 夯实机 力学模型 

分 类 号：U415.52[交通运输工程—道路与铁道工程]