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首页> 外文期刊>Journal of Cold Regions Engineering >Characteristics of Asphalt Pavement Damage in Degrading Permafrost Regions: Case Study of the Qinghai-Tibet Highway, China
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Characteristics of Asphalt Pavement Damage in Degrading Permafrost Regions: Case Study of the Qinghai-Tibet Highway, China

机译：退化多年冻土区沥青路面的破坏特征-以青藏公路为例

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摘要

In the context of climate warming, damage to road pavements and embankments in permafrost regions caused by thawing of underlying permafrost severely reduces the serviceability of roads. In this study, 10 types of asphalt pavement damage were measured every kilometer along the Qinghai-Tibet Highway (QTH), from Kunlun Mountain to Tonggula Mountain (approximately 440km in permafrost regions). Based on observed data and embankment geometry along the QTH, and information about the characteristics of the permafrost, aspects of pavement deterioration are analyzed and discussed. The three most common forms of pavement damage in the permafrost regions are transverse cracking (TC), potholes, and longitudinal cracking (LC), observed in 87, 64, and 57% of the study section, respectively. About half of the damaged pavement was also affected by block cracking (BC) and alligator cracking (AC), in addition to LC and TC. Results also showed that pavement damage in the degrading permafrost regions was closely related to the underlying permafrost characteristics and embankment geometry. Damage from settlement and patching were more severe in sections with high ice content than low ice content. All the above forms of damage increase exponentially with higher underlying permafrost temperatures. Because of the significant thermal effects of sunlit/shaded slopes, BC, LC, and TC cracking is closely related to roadway orientation, with the most severe cracking damage observed in roads oriented approximately east to west (E-W). Also, more LC was seen in sections of greater embankment thickness, which exacerbates the sunlit/shaded thermal effect. (c) 2018 American Society of Civil Engineers.
机译：在气候变暖的背景下，由于永久冻土的融化对永久冻土地区的人行道和路堤造成的破坏严重降低了道路的可使用性。在这项研究中，从昆仑山到通古拉山（多年冻土区约440公里），沿着青藏公路（QTH）每公里测量了10种类型的沥青路面破坏。根据沿QTH观测到的数据和路堤的几何形状以及有关多年冻土特征的信息，分析和讨论了路面劣化的各个方面。永久冻土区最常见的三种路面损坏形式是横向裂缝（TC），坑洞和纵向裂缝（LC），分别在研究部分的87％，64％和57％观察到。除LC和TC外，约有一半的受损路面还受到块裂（BC）和扬子鳄裂纹（AC）的影响。结果还表明，退化多年冻土区的路面破坏与潜在的多年冻土特征和路堤几何形状密切相关。高冰含量的部分比低冰含量的部分更容易受到沉降和修补的破坏。以上所有形式的破坏都随着较高的永久冻土温度成倍增加。由于日光/阴影斜坡的显着热效应，BC，LC和TC裂纹与道路定向密切相关，在大约东西向的道路（E-W）中观察到最严重的裂纹破坏。此外，在路堤厚度较大的区域中，可以看到更多的LC，这加剧了阳光照射/阴影遮盖的热效应。 （c）2018年美国土木工程师学会。

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  • 来源
    《Journal of Cold Regions Engineering》 |2018年第2期|05018003.1-05018003.11|共11页
  • 作者

    Chai Mingtang; Mu Yanhu; Zhang Jianming; Ma Wei; Liu Ge; Chen Jianbing;

  • 作者单位

    Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 100049, Beijing, Peoples R China;

    Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 100049, Beijing, Peoples R China;

    Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 100049, Beijing, Peoples R China;

    Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 100049, Beijing, Peoples R China;

    China Commun Construct Co, Highway Consultants Co Ltd, Keji Rd 63, Xian 710075, Shaanxi, Peoples R China;

    China Commun Construct Co, Highway Consultants Co Ltd, Keji Rd 63, Xian 710075, Shaanxi, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Qinghai-Tibet highway; Pavement damage; Embankment settlement; Permafrost degradation;

    机译：青藏公路路面破坏路堤沉降多年冻土退化;

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