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为研究青藏公路典型路基病害与多年冻土特征和路基高度之间的关系,根据青藏公路历次病害调查和勘探资料,开展统计研究。研究结果表明:沉陷、波浪病害随年平均地温的升高呈先增大后减少的趋势;随路基下伏多年冻土含冰量的增加而增大,含土冰层区相比饱冰冻土区沉陷、波浪病害会有一定量的减少;路基沉陷病害随路基高度的增加而减少。路基下伏多年冻土融化是产生纵向裂缝的根本原因,纵向裂缝病害随下伏多年冻土含冰量及路基高度的增加而增大。
In order to study the relationship between the typical subgrade defects of Qinghai-Tibet Highway and permafrost characteristics and subgrade height, a statistical study was conducted based on previous disease surveys and exploration data of the Qinghai-Tibet Highway. The results show that the subsidence and wave diseases firstly increase and then decrease with the increase of annual mean ground temperature, and increase with the increase of the ice content of permafrost under subgrade, , There will be a certain amount of wave disease reduction; subsidence disease subsidence with the increase of subgrade decrease. Melting of subgrade permafrost is the root cause of longitudinal cracks, and the longitudinal cracks increase with the ice content of subducted permafrost and the height of subgrade.