地质学报（英文版）2008，Vol.82Issue(5)：949-958,10.
Permafrost Characteristics of the Qinghai-Tibet Plateau and Methods of Roadbed Construction of Railway
Permafrost Characteristics of the Qinghai-Tibet Plateau and Methods of Roadbed Construction of Railway
摘要
Abstract
Permafrost along the Qinghai.Tibet railway is featured by abundant ground ice and high ground temperature. Under the influence of climate warming and engineering activities, the permafrost is under degradation process. The main difficulty in railway roadbed construction is how to prevent thawing settlement caused by degradation of permafrost. Therefore the proactively cooling methods based on controlling solar radiation, heat conductivity and heat convection were adopted instead of the traditional passive methods, which is simply increasing thermal resistance. The cooling methods used in the Qinghai-Tibet railway construction include sunshine-shielding roadbeds,crushed rock based roadbeds, roadbeds with rock revetments, duct-ventilated roadbeds, thermosyphon installed roadbeds and land bridges. The field monitored data show that the cooling methods are effective in protecting the underlying permafrost, the permafrost table was uplifted under the embankments and therefore the roadbed stability was guaranteed.关键词
permafrost/roadbed/cooling method/Qinghai-Tibet railwayKey words
permafrost/roadbed/cooling method/Qinghai-Tibet railway分类
天文与地球科学引用本文复制引用
NIU Fujun,XU Jian,LIN Zhanju,WU Qingbai,CHENG Guodong..Permafrost Characteristics of the Qinghai-Tibet Plateau and Methods of Roadbed Construction of Railway[J].地质学报（英文版）,2008,82(5):949-958,10.基金项目
This work was supported in part by the Chinese Natural Science Fund(No.40471023),the Outstanding Youth Foundation Project,Natural Science Foundation of China(No.40625004)to Qingbai Wu,the grant of the Knouwledge Innovation Program of the CAS(No.KZCX1-SW-04,CZCX-XB-10) and the National Science Supporting Project of the Ministry of Science and Technology of China(2006BAC07B02). （No.40471023）
