基于道路结构承载力及环境严酷程度的服役寿命评价指标研究  

Study on Service Life Evaluation Indexes Based on Road Structure Bearing Capacity and Environmental Severity

作　　者：汪海年[1] 赵云飞 杨旭 WANG Hai-nian;ZHAO Yun-fei;YANG Xu(School of Highway,Chang'an University,Xi'an 710064,Shaanxi,China;School of Future Transportation,Chang'an University,Xi'an 710064,Shaanxi,China)

机构地区：[1]长安大学公路学院,陕西西安710064 [2]长安大学未来交通学院,陕西西安710064

出　　处：《中国公路学报》2024年第12期210-227,共18页China Journal of Highway and Transport

基　　金：国家重点研发计划项目(2021YFB2601000)。

摘　　要：随着中国公路进入大规模养护期,大量公路服役时间已经进入设计寿命后期,但现有养护体系还缺少公路的延寿标准,现行寿命评价指标主要针对新建道路。考虑道路服役过程中实际环境和荷载造成的道路状态劣化,提出了在役路面“自身健康状况+外部服役环境”的长寿命评价方法,并结合寿命预期初步提出相应的指标阈值。利用弯沉盆参数(Deflection Basin Parameters,DBP),其包括表面曲率指数(SCI)、基层损伤指数(BDI)、基层曲率指数(BCI)及道路状况指数(CI),采用主成分分析法构建道路健康指数(H_(PHI)),以表征道路结构健康水平。基于中国公路自然区划以潮湿系数(K)、标准冻深(H_(0))、冻结指数(F)来表征自然环境,同时结合交通荷载等级联合构建环境恶劣指数(E_(EHI)),以描述道路外部服役环境的严酷程度;基于H_(PHI)与E_(EHI)联合构建道路健康劣化速率(R_(HDR))作为在役道路长寿命评价指标。研究结果表明:H_(PHI)与R_(HDR)可联合判定道路的寿命阶段;在第二寿命阶段中,R_(HDR)小于0.2是道路寿命30年的长寿命阈值,小于0.7是道路寿命15年的标准阈值;当R_(HDR)突然连续增大时,表征道路寿命进入第3阶段是预警阈值。在理论领域,所提出的长寿命评价指标实现了道路寿命抽象到具体的描述,将道路的三阶段理论转变为现实的指标,可依据此指标实现道路状态的长期监测与寿命预测,对在役道路的长寿命分析提供理论支撑。With the large-scale maintenance period of Chinese roads,the service time of a large number of roads has entered the late stage of design life,but the existing maintenance system still lacks the standards of highway life extension,and the current life evaluation index is mainly for newly built roads.Taking into account the deterioration of road conditions due to environmental factors and load during service,a long-life evaluation method is proposed.This method combines the pavement's intrinsic health condition with external service environment factors,along with corresponding index thresholds linked to life expectancy.A road health index(H_(PHI))was constructed to characterize the structural health level of the road using principal component analysis(PCA)The Deflection Basin Parameters(DBP)were used to include:the Surface Curvature Index(SCI),the Base Damage Index(BDI),the Base Curvature Index(BCI),and the Condition Index(CI).Based on the natural zoning of China's highways for wet coefficient(K),standard freezing depth(H_(0)),and freezing index(F)characterization of the natural environment,combined with the traffic load level,the jointly constructed environmental harsh index(E_(EHI))describes the severity of the external service environment of the road.Based on H_(PHI) and E_(EHI),the road health deterioration rate(R_(HDR))was constructed as an evaluation index for the long life of roads in service.Preliminary research results show that H_(PHI) and R_(HDR) can jointly determine the life stage in the three-stage life theory.In the second life stage,R_(HDR) less than 0.2 is the long-life threshold for a road life of 30 years,less than 0.7 is the standard threshold for a road life of 15 years,and when the R_(HDR) increases suddenly and continuously,it characterizes the road life into the third stage as the warning threshold.In the theoretical domain,the proposed long-life evaluation index translates the abstract concept of road lifespan into a concrete and practical index.It converts the three-stage road theory into

关 键 词：路面工程 长寿命路面 长寿命评价指标 道路健康指数 环境恶劣指数 健康劣化速率 

分 类 号：U416.2[交通运输工程—道路与铁道工程]