滇藏铁路滇西北段主要地质灾害类型及发育规律的探讨

滇藏铁路滇西北段位于青藏高原东南缘向云贵高原的过渡部位,地貌复杂、峡谷深切,新构造运动十分强烈,地震活动频繁。该区的降雨主要集中在5~10月份,降雨强度大且集中。复杂的地质环境加之降雨、人类活动等外部因素造成该地区成为崩塌、滑坡和泥石流等地质灾害多发区,常引起交通中断、毁坏房屋及人员伤亡事故。本文在野外地质调查的基础上,着重阐述了滇藏铁路滇西北段主要地质灾害类型及发育规律,对于减少和预防铁路遭受崩塌、滑坡和泥石流等的危害具有重要的理论和实际意义。 

MAIN GEOHAZARD TYPES AND THEIR OCCURRENCE CHARACTERISTICS ALONG THE YUNNAN-TIBET RAILWAY IN NW YUNNAN

The Yunnan-Tibet Railway in NW Yunnan is located at the transitional position of the southeastern Qinghai-Tibet Plateau to Yunnan-Guizhou Plateau, where landforms are complex, valleys are deeply incised, neotectonic movement is very intense and earthquakes occur frequently. The precipitation in the area is mainly recorded in May to October, when the rainfall is high and centralized. Because of the complex geological environment, combined with rain, human activities and other exterior factors, the area becomes an area of repeated occurrence of geohazards such as landslides, debris flow and avalanches, which often cause traffic interraption, destroy houses and cause casualties. On the basis of field geological investigations, the authors focus on the main geohazard types and their occurrence characteristics along the Yunnan-Tibet railway in NW Yunnan, which have important theoretical and practical significance for mitigating and preventing geohazards such as landslides, debris flows and avalanches that the railway might suffer.