高原多年冻土地区公路修筑技术研究的回顾与展望

通过大量的研究课题实例，回顾了高原多年冻土地区公路修筑技术研究的各个历史阶段，综述了公路修筑技术的研究内容和成果。高含冰量冻土分布规律及工程地质研究、冻土路基设计与冻土路基变形规律研究及保持冻土路基稳定性的路基设计原则和工程措施研究、路面修筑技术研究、桥涵基础研究等。随着高原多年冻土地区公路路面等级的提高和路面使用时间的延续及人为因素的不良影响，高原多年冻土地区的公路路基、路面和桥涵等出现了一些新

The Study of Highway Construction Techniques on Plateau Permafrost Regions: Review and Prospect

Qinghai-Tibet Highway is the key way to join the Tibetan Autonomous Region and Qinghai Province, and is the best useful entrance and exit of the Tibetan Autonomous Region whih provides more than 85 percent of goods from the other inner provinces to the region. This paper reviews every steps of the 40 years studying in several topics, and sums up the content and the fruits. The methods of exploring technique is developing from drilling to a combination of drilling and radar. The subgrade is developing to use the methods of elevating the height of fill, setting heat insulation and setting waterproof and heat preservation side-road. The pavement is developing to use modified asphalt concrete and steel fiber concrete now, from grit and aggregate pavement in the 1950's to asp. macadam pavement, bituminous surface treatment pavement in the 1970's. The bridge and culvert is developing from wooden structure mainly in the 1950's and 1960's to reinforced concrete and prestressed reinforced concrete. At the same time the permafrost and the temperature field along the way is studied. Further research on the Qinghai-Tibet Highway is suggested in order to be a sustainable development way and to mitigate the diseases on subgrade,pavement and bridge.