钢桥面灌注式树脂混凝土铺装材料与结构研究  

Study on Material and Structure of PRC for Steel Bridge Deck Pavement

作　　者：赵国云 ZHAO Guo-yun(Chongqing Zhixiang Paving Technology Engineering Co.,Ltd.,Chongqing 400060,China;China Merchants Chongqing Communications Research & Design Institute Co.,Ltd.,Chongqing 400067,China)

机构地区：[1]重庆市智翔铺道技术工程有限公司 [2]招商局重庆交通科研设计院有限公司

出　　处：《公路交通科技》2019年第10期67-73,共7页Journal of Highway and Transportation Research and Development

基　　金：广东省交通运输厅科技计划项目(科技-2017-02-016)

摘　　要：为解决桥面系刚度不足时正交异性板的疲劳开裂和铺装的早期破坏问题,基于适度提高铺装材料模量和路用性能的思路,研发灌注式树脂混凝土(PRC)和相应铺装结构.通过室内试验,研究灌注用树脂性能、PRC路用性能和PRC铺装结构层间黏结性能;通过有限元建模和计算,分析PRC铺装结构的受力特点和对正交异性板疲劳细节的保护作用;采用复合梁疲劳试验和缩尺模型加速加载试验对PRC铺装的结构性能进行检验.结果表明:PRC具有优良的高温稳定性、水稳定性和低温抗裂性,满足沥青混合料技术要求,并具有较长的疲劳寿命;PRC铺装结构的层间黏结强度优于环氧沥青混凝土和浇注式沥青混凝土铺装结构;PRC铺装结构具有较小的表面拉应力和较大的底剪应力,但均远小于材料强度和层间黏结强度,且优于常用沥青混凝土铺装;采用PRC铺装结构,正交异性板疲劳细节的应力降低了20%左右,肋间相对挠度、最小曲率半径和相对挠跨比均更为有利,对桥面系起到了更好的保护作用;复合梁五点脉动弯曲疲劳寿命超过100万次,表明PRC铺装结构防水黏结层性能满足要求;加速加载试验中,加载12万次后PRC铺装结构无车辙,正交异性板无裂缝.工程应用结果表明,PRC及铺装结构工艺合理,铺装及正交异性板均未发现病害.In order to solve the problems of fatigue cracking in OSD and early damage in deck pavement resulting from low stiffness of deck system, the PRC and corresponding structure are researched based on the thinking of improving the modulus and the road performance of paving material properly. The properties of the resin for pouring, the road performance of PRC and the adhesive properties between layers of PRC pavement structure are studied by laboratory experiment. The mechanical properties of PRC deck pavement structure and its protection function to OSD fatigue details are analyzed by F E modelling and calculation. Composite beam fatigue test and acceleration loading test of scaled model are adopted to verify the structure performance of the deck pavement. The result shows that (1) PRC has excellent high temperature stability, water stability and low-temperature crack resistance which can meet the technical requirement for asphalt mixture, and has relatively long fatigue life;( 2 ) the adhesive strength between layers of PRC pavement structure is better than epoxy asphalt concrete pavement structure and Gussasphalt concrete pavement structure;(3) PRC pavement structure has relatively low surface tensile stress and relatively high bottom surface shear stress, but both of them are far less than material strength and adhesive strength between layers, and are better than comm on asphalt concrete deck pavement;(4) the stress of fatigue details in OSD paved with PRC pavement structure is decreased by about 2 0 %, and relative deflection between ribs, minimum curvature radius and relative ratio of deflection to span is more favorable, so that the deck system gets further protection;(5 ) the fatigue life of five-point composite beam fatigue test by pulsation bending is more than 1 million times, indicating that the PRC waterproofing adhesive layer performance can meet the requirement;(6) the PRC deck pavement structure has no rut and OSD has no cracking after loaded 12 million times in acceleration loading test. The project

关 键 词：桥梁工程 钢桥面铺装 室内试验和理论分析 有限元分析 灌注式树脂混凝土 正交异性板 加速加载试验 

分 类 号：U414[交通运输工程—道路与铁道工程]