Monitoring and analysis of cooling effect of block-stone embankment for Qinghai-Tibet Railway

摘要: Block-stone embankment is one of the most important engineering measure for protecting permafrost Qinghai-Tibet Railway which has been used in about 60% sections warm with high ice content.After monitoring analysis soil temperature beneath block-stone Railway,it can be concluded that working positively cooling roadbed and making great rise table,but also causing a permafrost.The trend will gradually restrained by reducing thermal disturbances drop embankment.And,for cold permafrost,a better stability situation developed under condition near table largely dropped.But,even highly raised annual imbalance process rise,it disadvantageous permafrost.Thus,the applicability structure worth to discussed order take corresponding measures solve problems regions.