基于亿次加载试验的长寿命沥青路面性能演化规律及设计体系研究  

Performance Evolution Law and Design System of Long-life Asphalt Pavement Based on One Hundred Million Loading Tests

作　　者：王旭东[1] 杨光[1,2] 钱振东 周兴业[1] 肖倩[1] WANG Xu-dong;YANG Guang;QIAN Zhen-dong;ZHOU Xing-ye;XIAO Qian(Research Institute of Highway Ministry of Transport,Beijing 100088,China;Beijing Zhonglu Gaoke Highway Technology Co.Ltd.,Beijing 100088,China;Intelligent Transportation System Research Center,Southeast University,Nanjing 211189,Jiangsu,China)

机构地区：[1]交通运输部公路科学研究院,北京100088 [2]中路高科(北京)公路技术有限公司,北京100088 [3]东南大学智能交通运输系统研究中心,江苏南京211189

出　　处：《中国公路学报》2024年第12期197-209,共13页China Journal of Highway and Transport

基　　金：国家重点研发计划项目(2020YFA0714300);交通运输部公路科学研究所(院)交通强国试点项目(QG2021-1-1-1);中央级公益性科研院所基本科研业务费项目(2024-9004)。

摘　　要：为了研发与验证长寿命沥青路面的设计原理与建造技术,本文依托足尺路面试验环道(RIOHTrack)亿次级加速加载试验和长期、高频度的跟踪观测与试验研究,一方面提出并验证了一套工程可靠性高、适用性广,可显著提升沥青路面耐久性的“四化”建造技术,即“结构设计功能化、材料设计均衡化、施工工艺均一化和质量控制过程化”;同时,揭示了宽刚度域基层沥青路面性能演化的荷载-环境耦合效应,服役性能的结构依赖性,性能演化的拐点及反“S”型趋势,路面T-D裂缝与车辙的对偶性损伤,以及FWD弯沉指标的负触变效应等5个本质演化规律。在此基础上,针对长寿命路面结构安全寿命和路表使用功能寿命的双寿命标准以及双向疲劳损伤模式,建立了宽刚度域基层长寿命沥青路面的结构体系,明确了相应的设计原则和设计指标。以结构刚度和结构模量为核心,提出了以4层体系FWD弯沉盆反算为基础,遵循结构刚度守恒和结构层刚度响应唯一性为原则的,多层体系结构层模量的反演方法。最终以服役性能反“S”演化趋势为基础,构造外因演化模型,并以结构刚度为内因指标,以结构模量确定力学指标,解决服役性能的结构依赖性问题,提出适用于宽刚度域基层结构的性能演化新模型,初步形成了长寿命沥青路面的设计体系。To develop and verify the design principles and construction technology of long-life asphalt pavement,this study conducted 100 million accelerated loading tests and long-term,high-frequency tracking observations and experimental research of the full-scale test track(RIOHTrack).First,a set of“SIHUA”construction technologies with high engineering reliability and wide applicability,which can significantly improve the durability of asphalt pavement,is proposed and verified,namely“structural design functionalization,material design balancing,construction technology homogenization,and quality control proceduralization.”Then,five essential performance evolution laws of asphalt pavement in a wide range of base stiffness are revealed:the coupling effect of load and environment,structural dependence of service performance,inflection point of performance evolution and inverse“S”-shaped trend,the dual damage of pavement T-D cracking and rutting,and the negative thixotropic effect of FWD deflection.Based on the dual-life standards of the long-life pavement including the safety life of structure and functional life of the road surface,as well as the bidirectional fatigue damage mode,a structural system of long-life asphalt pavement in a wide range of base stiffness is established,and the corresponding design principles and indexes are clarified.Taking the structural rigidity and structural modulus as the core,a back-calculation method for the structural layer modulus of the multi-layer system is proposed.This method is based on the FWD deflection basin back-calculation of the four-layer system,and the principles are structural rigidity conservation and uniqueness of the structural layer rigidity response.Finally,based on the inverse“S”evolution trend of service performance,an external factor evolution model is constructed,where the structural rigidity is used as the internal factor index,and the structural modulus is used to determine the mechanical index to solve the structural dependence problem of service pe

关 键 词：路面工程 长寿命路面 足尺环道 宽刚度域 模量反算 结构刚度 性能演化模型 

分 类 号：U416.2[交通运输工程—道路与铁道工程]