在世界范围内,多年冻土地区修筑铁路虽然已有近百年的历史,但直到现在,冻土对路基的破坏还是相当严重。俄罗斯贝阿铁路线路病害率在27．7%,后贝加尔铁路线路病害率达40．5%,加拿大北部海湾冻土铁路也都大范围地出现了融化下沉和冻胀隆起的病害。冻土病害的治理一直是难以解决的世界性难题。张鲁新,青藏铁路冻土专家组组长,研究冻土长达36年。身边的同事朋 Around the world, although the construction of railways in permafrost regions has been going on for nearly one hundred years, until now, the destruction of roadbed by frozen soils has remained rather serious. The disease rate of Russia’s Bea railway line was 27.7%, that of the post-Baikal railway line was 40.5%, and that of the Gulf Coast Tundra Railway in northern Canada also suffered from extensive melting and sinking and frost heaving uplift. The treatment of permafrost has always been a hard-to-solve worldwide problem. Zhang Lu new, Qinghai-Tibet Railway permafrost expert group leader, research frozen soil up to 36 years. Friends around friends