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通过对青藏公路多年冻土路段纵向裂缝的形成条件和影响因素的调查,根据裂缝形成的路基高度、建设历史、冻土类型、路基坡向和路基排水等条件探讨纵向裂缝的分布规律,依据裂缝的形成条件、影响因素、形态特点和变形特征进行形成机理分析,认为纵向裂缝的形成和分布与多年冻土融化、季节活动层冻融过程密切相关,路基过高、地表积水等因素也是裂缝产生的重要影响因素。研究可为纵向裂缝的工程防治提供参考依据。
Based on the survey of formation conditions and influencing factors of vertical cracks in permafrost section of Qinghai-Tibet Highway, the distribution of longitudinal cracks is discussed according to the height of subgrade, construction history, permafrost type, subgrade slope and subgrade drainage, Forming factors, formation characteristics and deformation characteristics of the forming mechanism analysis, that the longitudinal cracks in the formation and distribution of permafrost melting, the seasonal active layer freezing and thawing process is closely related to high subgrade, surface water and other factors are cracks Produced by the important factors. Research can provide a reference for the prevention and control of longitudinal cracks.