干寒区锅盖效应致灾特征及案例分析
发布时间：2019-08-17 12:36
【摘要】：干寒区"锅盖效应"会引起路基、道基上部含水率增加,进而诱发路基、道基强度降低及盐胀等问题,最终导致路面、道面破坏,影响正常通车、通航。干寒区"锅盖效应"水分来源主要为冷凝或冷冻作用,基于这一机理认识,针对干寒区"锅盖效应"的致灾机理进行阐述;结合兰州中川机场、敦煌机场两个工程案例进行灾害的成因分析和讨论,提出了灾害的防治建议。
[Abstract]:The "pot cover effect" in dry and cold region will lead to the increase of moisture content in the upper part of the roadbed, and then induce the subgrade, the strength of the road foundation and salt expansion, etc., which will eventually lead to the destruction of the pavement and pavement, and affect the normal traffic and navigation. The water source of "pot cover effect" in dry cold region is mainly condensation or freezing. Based on this mechanism, this paper expounds the disaster mechanism of "pot cover effect" in dry cold area, analyzes and discusses the causes of disasters combined with two engineering cases of Lanzhou Zhongchuan Airport and Dunhuang Airport, and puts forward some suggestions for disaster prevention and control.
【作者单位】： 北京航空航天大学交通科学与工程学院;
【基金】：国家“973计划”项目(2014CB047006) 国家自然科学基金项目(11272031)
【分类号】：V351.11
，
本文编号：2527785
[Abstract]:The "pot cover effect" in dry and cold region will lead to the increase of moisture content in the upper part of the roadbed, and then induce the subgrade, the strength of the road foundation and salt expansion, etc., which will eventually lead to the destruction of the pavement and pavement, and affect the normal traffic and navigation. The water source of "pot cover effect" in dry cold region is mainly condensation or freezing. Based on this mechanism, this paper expounds the disaster mechanism of "pot cover effect" in dry cold area, analyzes and discusses the causes of disasters combined with two engineering cases of Lanzhou Zhongchuan Airport and Dunhuang Airport, and puts forward some suggestions for disaster prevention and control.
【作者单位】： 北京航空航天大学交通科学与工程学院;
【基金】：国家“973计划”项目(2014CB047006) 国家自然科学基金项目(11272031)
【分类号】：V351.11
，
本文编号：2527785
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