Engineering Techniques for Bridge Works in Permafrost Regions of the Tibetan Plateau

Technology measures and engineering techniques for the bridge works in the high and cold regions of the Tibetan Plateau are presented in this paper,which are based on practice and theoretical analyses,analyzing various kinds of circumstances of the plateau,such as high altitude,oxygen lacking,very low temperature and complicated climate,and considering the particularity and complexity of permafrost along the Qinghai-Tibet railway.In permafrost regions of the plateau,the bridge works will change the temperature field,stress field in permafrost and the exchanges of water and heat within permafrost.So,to select a reasonable work season and construction method,and to adopt some compulsory engineering techniques are necessary for reducing heat disturbance in the permafrost regions.