室内反射裂缝试验方法研究进展  

Research Progress of Indoor Reflective Crack Test Method

作　　者：王威娜[1,2] 周圣雄 秦煜[1,3] WANG Weina;ZHOU Shengxiong;QIN Yu(School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China;National and Local Joint Engineering Laboratory of Traffic Civil Engineering Materials,Chongqing Jiaotong University,Chongqing 400074,China;CREEC(Chongqing)Survey,Design and Research Co.Ltd,Chongqing 400023,China)

机构地区：[1]重庆交通大学土木工程学院,重庆400074 [2]重庆交通大学交通土建工程材料国家地方联合工程实验室,重庆400074 [3]中铁二院重庆勘察设计研究院有限责任公司,重庆400023

出　　处：《材料导报》2022年第5期75-84,共10页Materials Reports

基　　金：国家自然科学基金(52078091,51978114);重庆市自然科学基金(cstc2020jcyj-msxmX0624)。

摘　　要：旧路加铺沥青混凝土是实际工程常用的旧路修复方法,而反射裂缝是复合结构路面的主要病害类型。反射裂缝本身不会对路面造成严重损坏,但一旦形成并贯穿加铺层,水就会渗透至结构层内部,在交通荷载和温度变化的共同作用下破坏内部结构层,严重影响沥青路面的疲劳寿命。为延缓反射裂缝的出现,延长复合式结构路面的疲劳寿命,各类防治反射裂缝的方法相继被提出,可分为改善沥青加铺层性能、设置中间阻裂夹层和旧路处理三类。科研工作者们设计了大量的室内反射裂缝试验,用以探究反射开裂机理和评估各类防反措施,得到的试验数据再反馈于路面抗裂设计。实际道路中的反射开裂过程复杂,室内试验会不同程度地简化影响因素,影响反射开裂的因素主要有交通荷载和温度。依据影响因素将现有室内反射裂缝试验分为温度型、交通型和耦合作用型。温度型反射裂缝试验模拟温度变化引发的拉伸荷载;交通型反射裂缝试验模拟接裂缝上方的沥青加铺层在车轮荷载作用下承受的弯曲和剪切应力;耦合作用型反射裂缝试验会同时模拟交通荷载和温度应力,对接裂缝上方的沥青加铺层施加拉伸、剪切和弯曲荷载,贴近真实路面情况。本文系统综述了国内外室内反射裂缝试验研究现状,归纳了温度型、交通型和耦合作用型三类室内反射裂缝试验方法,对各类室内反射裂缝试验的优缺点进行了评价,并指出了现有存在问题及未来的发展趋势,以期为后续制定标准化的反射裂缝试验方法提供参考。Adding asphalt concrete layer on old roads is a common old road repair method in actual engineering,and reflective cracks are the main disease type of composite structure pavement.Reflective cracks will not cause serious damage to the pavement,but once formed and penetrated through the overlay,water will penetrate into the structure layer,destroy the internal structure layer under the combined action of traffic load and temperature changes,and seriously affect the fatigue life of the asphalt pavement.In order to delay the occurrence of reflective cracks and prolong the fatigue life of composite structure pavements,various methods to prevent reflective cracks have been proposed one after another,which can be divided into three categories:improving the performance of asphalt overlays,interlayers and treating old roads.Researchers have designed a large number of indoor reflective crack tests to explore the mechanism of reflective cracking and evaluate various methods of preventing reflective cracks.The obtained test data are fed back to the pavement anti-cracking design.The reflection cracking process in actual roads is complicated,and the indoor test will simplify the influencing factors.There are two main factors affecting reflection cracking,traffic load and temperature changes.According to influencing factors,the existing indoor reflection crack test is divided into temperature type,traffic type and coupling type.The temperature-type reflective crack test simulates the tensile load caused by temperature changes;the traffic-type reflective crack test simulates the bending and shear stress of the asphalt overlay above the crack under the action of wheel load;the coupling-action reflective crack test simulates simultaneously traffic load and temperature stress.Tensile,shear and bending loads are applied to the asphalt overlay above the joint crack,which is close to the real road conditions.This paper systematically reviews the research status of indoor reflective crack tests at home and abroad,summarizes three type

关 键 词：沥青混合料 反射裂缝 试验方法 加铺 荷载 耦合 水泥混凝土 

分 类 号：U416.216[交通运输工程—道路与铁道工程]