新藏公路路面病害空间分布及相互关系分析  

Analysis on spatial distribution and correlation of pavement distress along the Xinjiang-Tibet Highway

作　　者：柴明堂 马腾 李国玉 牛富俊 陈敦 杜青松 齐舜舜 周宇 曹亚鹏 CHAI Mingtang;MA Teng;LI Guoyu;NIU Fujun;CHEN Dun;DU Qingsong;QI Shunshun;ZHOU Yu;CAO Yapeng(School of Civil and Hydraulic Engineering,Ningxia University,Yinchuan 750021,China;State Key Laboratory of Frozen Soil Engineering,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China)

机构地区：[1]宁夏大学土木与水利工程学院,宁夏银川750021 [2]中国科学院西北生态环境资源研究院冻土工程国家重点实验室,甘肃兰州730000

出　　处：《冰川冻土》2022年第6期1681-1693,共13页Journal of Glaciology and Geocryology

基　　金：第二次青藏高原综合科学考察研究项目(2019QZKK0905);国家自然科学基金项目(42001065);冻土工程国家重点实验室开放基金项目(SKLFSE202106);宁夏自然科学基金项目(2022AAC03052)资助。

摘　　要：新藏公路既是通往西藏地区重要的人员、物资运输通道,又是我国海拔最高的公路,沿线地质条件复杂、病害发生率高。为研究新藏公路各类路面病害空间分布特征,并揭示病害之间的相互关系,首先对公路沿线现有的主要路面病害进行了全面调查,获得了7类病害的影响范围和病害发生率;采用统计分析方法研究了不同病害之间的相互关系;通过数据拟合的方式,揭示了新藏公路沿线的地表温度、海拔和植被等环境要素与道路病害之间的定量关系。研究发现,对于整个研究路段(叶城—拉孜,共计2 140 km),以每公里为单位,调查得到路面破损率的平均值为2.5%,病害发生率最高的三类病害分别为横向裂缝(58.3%)、纵向裂缝(32.9%)和龟裂(34.1%),是造成新藏公路路况条件下降的主要原因。在现有的7种主要病害中,各类路面病害之间呈现相互影响的特征,相关系数最高的三组病害分别为横向裂缝-纵向裂缝(0.629)、纵向裂缝-网状裂缝(0.494)、横向裂缝-网状裂缝(0.484),一种道路病害的发生,往往会伴随着其余几种道路病害的形成和发育。高海拔地区公路的路面裂缝与环境因素的相关性较为明显,受太阳辐射和冻融循环的影响,路面裂缝的产生规模和发展速率远超其他地区的公路。研究结果揭示了各类路面病害之间及其与环境因素的相互关系,为新藏公路运营维护、病害治理,以及规划中的新藏交通走廊建设提供重要科学依据和理论参考。The Xinjiang-Tibet Highway(XTH) is a transportation corridor of manpower and supplies from inland regions to Tibet. The XTH has the highest altitude in China, which also has complex geological conditions and high distress ratio. The pavement distress was investigated completely to analyze the spatial distribution of pavement distress along the XTH and reveal the relationship among different types of distress. The distress ratio of 7 types of pavement distress was obtained and the relationship of pavement distress and ground surface temperature, altitude and vegetation cover was quantitatively fitted along the XTH. The result shows that, distress occurrence ratio of racking is has the largest percentage, which is the main reason to reduce the road condition.Pavement distress has a positive correlation and interaction with each other. One type of distress appears with the formation and development of other types of distress. The pavement cracking of the roadway with high altitude was obviously influenced by solar radiation and freeze-thaw cycle, which has a larger occurrence scale and development ratio than other regions. This paper reveals the relationship of each pavement distress and environmental factors, and provides a scientific basis and theoretical reference for the operation, maintenance and distress treatment of the XTH and planning Xingjiang-Tibet transportation corridor.

关 键 词：新藏公路 病害调查 相关性 环境因素 路面裂缝 

分 类 号：U419.92[交通运输工程—道路与铁道工程]