【作者】 林战举； 牛富俊； 许健；

【Author】 LIN Zhanju NIU Fujun XU Jian (Cold & Arid Regions Environmental & Engineering Research Institute,State-assigned Key Lab.of Frozen Soil Engineering,Lanzhou 730000)

【机构】 中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室；

【摘要】 多年冻土区青藏铁路沿线次生冻融灾害关系到整条铁路的安全、高效运营。本文通过对运行一年多来的青藏铁路进行较为细致的调查后,总结了多年冻土区青藏铁路沿线的主要次生冻融灾害类型有:路肩及护道裂缝;桥台、护锥(坡)及涵洞冻裂;冰锥及冰幔;冻胀及冻胀丘;热融湖塘;热融沟及寒冻风化等7类,并初步分析了其破坏特征及病害成因,为今后青藏铁路病害防治提供参考依据。更多还原

【Abstract】 Secondary freezing-thawing hazards in permafrost regions Qinghai-Tibet railway roadbed are key of the railway safe use.This paper summarized seven types main secondary freezing-thawing hazards along the permafrost regions Qinghai-Tibet railway roadbed which would impact on railway transportation in future,such as cracking of road shoulder and berm,frost crack of abutment,protection slope and culvert,drumlin and ice sheet,frost heaving and frost mound,thaw lakes,thawing groove and frost weathering etc.,after careful survey for the Qinghai-Tibet railway that has been used for about 1.5 years.Via observation of the secondary freezing-thawing hazards,to analyze their character and cause of formation.This will offer to the important reference basis for prevention and cure of the disease of Qinghai-Tibet railway roadbed.更多还原