基于有限元分析和加速加载试验的高速公路基层裂缝注浆技术应用研究  

Research on Application of Reflection Crack Grouting Technology in Expressway Based on Finite Element Analysis and Accelerated Loading Test

作　　者：周健楠 ZHOU Jian-nan(School of Traffic Engineering,Shenyang Jianzhu University,Shenyang 110168,China;Liaoning Transportation Research Institute Co.,Ltd.,Shenyang 110015,China;Key laboratory of Expressway Maintenance Technology Ministry of Communications,Shenyang 110015,China)

机构地区：[1]沈阳建筑大学交通工程学院 [2]辽宁省交通科学研究院有限责任公司 [3]高速公路养护技术交通运输行业重点实验室

出　　处：《北方交通》2019年第11期36-41,共6页Northern Communications

摘　　要：通过建立路面结构有限元模型分析计算了在半刚性基层裂缝位置采取注浆措施维修前后路面结构应力变化情况,并利用MLS66加速加载系统,分别对采用注浆措施维修的试验路段和未采用注浆维修的试验路段进行了足尺加速加载试验,研究了在相同外部环境下经加载试验后两个路段内部的应变变化情况,结果表明:有限元模型计算结果符合实际且注浆技术可改善路面裂缝位置半刚性基层结构内部的应力状态,抑制裂缝的扩展,增强维修后路面的耐久性和耐疲劳性。In this paper,the stress variation of pavement structure before and after grouting repair in crack position of semi-rigid base course is calculated by establishing finite element model of pavement structure.Full-scale accelerated loading tests are carried out on the test section repaired by grouting measure and the test section not repaired by grouting with MLS66 accelerated loading system,respectively.The accelerated loading tests under the same external environment are studied.The results show that the results of the finite element model are in line with the reality and the grouting technology can improve the stress state in the semi-rigid base structure,restrain the expansion of cracks and enhance the durability and fatigue resistance of the repaired pavement.

关 键 词：有限元分析 加速加载试验 半刚性基层 裂缝 注浆 应力变化 

分 类 号：U418.5[交通运输工程—道路与铁道工程]