振动压实重叠宽度的确定  

Determination of Overlapping Width in Vibratory Compacting

作　　者：张志峰[1] 郝飞[2] 冯忠绪[1] 

机构地区：[1]长安大学"道路施工技术与装备"教育部重点实验室 [2]南京工程学院

出　　处：《工程机械》2009年第6期25-28,共4页Construction Machinery and Equipment

基　　金：国家"863"计划重大项目(2001AA422012)

摘　　要：利用Ansys／Ls—Dyna3D软件建立振动压路机振动碾压土壤过程的三维模型，对振动压实过程进行仿真分析和试验研究，计算的结果满足工程精度要求，土壤表层沉降量和土壤竖向应力误差在10％以内，可用于指导施工。研究表明，在振动压实过程中，土壤的竖向应力沿轮宽方向对称分布，在距轮缘1／5—1／4处竖向应力衰减明显，提出施工中宜取1／5～1／4轮宽作为振动压实重叠宽度的建议，并据此进行试验，结果显示压实12遍后土壤压实度极差仅为0．6％，压实度均匀性较好。A 3D model of vibratory soil rolling and compacting procedure is set up for a vibratory compactor with Ansys/Ls-Dyna 3D software to simulate, analyze, test and research the vibratory compaction process. Method to determine the overlapping width during vibratory compaction is suggested. The research shows that: the calculation results meet the requirements of construction accuracies; errors of the surface sedimentation and vertical soil stresses are both within 10%; the vertical soil stresses are symmetrically distributed along the drum width and there is an obvious attenuation of the vertical stresses at 1/5～1/4 position from the drum rim; it is rational to determine overlapping width on the basis of the stresses distribution and the compactness error is only 0.6% after twelve passes of compaction so a satisfactory compaction uniformity is obtained.

关 键 词：振动压实 振动轮 重叠宽度 有限元分析 

分 类 号：U415.52[交通运输工程—道路与铁道工程]