青藏公路路面病害成因分析

青藏公路多年冻土段路面大范围出现波浪沉陷和开裂等病害，在综合病害调查、钻探取芯分析、动力触探、路面弯沉检测和面层材料试验等基础上，讨论了病害与青藏高原特殊自然条件，路基下多年冻土变化，路基及地基密实程度，路面基层性状和面层材料的关系，分析了路面病害的分布规律和影响因素，认为恶劣的气候条件和多年冻土的变化是路面病害发生的主要原因，面层和基层材料质量达不到要求也是重要影响因素。

Analysis on Surface Troubles of the Qinghai-Tibet Highway

There are many depressions, waves and cracks on the pavement of the Qinghai-Tibet Highway in permafrost regions. According to investigation, dynamic penetration test, core analysis and deflection test,the relations between the troubles and climate, thawing of permafrost under the embankment, load-bearing capacity of foundation, material of pavement structure layer are discussed in this paper. The conclusion is come that strong ultraviolet ray causes asphalt pavement ageing, low temperature and dry climate cause the strength of concrete pavement and cement- stabilized base lowering, and change in permafrost under the surface causes asphalt pavement depressing and rippling and falling.