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青藏公路沥青混凝土路面修建后,增大了路基下多年冻土的吸热量,导致了多年冻土融化。多年冻土融沉变形在冻土路基变形中占主导地位,其发生、发展与冻土温度及工程地质特性等有关。通过青藏公路唐南地区路基变形监测数据,分析了路基变形的特征及多年冻土融沉变形的影响因素。
After the construction of Qinghai-Tibet Highway asphalt concrete pavement, the heat absorption of permafrost under the subgrade is increased, resulting in the thawing of permafrost. The thawing and thawing deformation of permafrost dominates in the deformation of permafrost subgrade, and the occurrence and development of permafrost are related to the temperature and engineering geologic characteristics of frozen soil. Based on the monitoring data of subgrade deformation in Tangnan area of Qinghai-Tibet Highway, the characteristics of subgrade deformation and the influencing factors of subsidence and deformation of permafrost are analyzed.