滇西大理至瑞丽铁路龙陵段主要的地质灾害类型及其发育规律

大理—瑞丽铁路龙陵段地处云南高原滇西峡谷区，处于怒江与伊洛瓦底江两大水系分水岭地带。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。复杂的地质环境及降雨、人类活动等外部因素使该地区成为崩塌、滑坡、泥石流等地质灾害多发区，常冲毁稻田、山林，发生毁坏桥梁公路、毁坏房屋及人员伤亡的事故。阐述了大理—瑞丽铁路龙陵段主要地质灾害的分布、形成条件及发育规律, 为大理—瑞丽铁路工程规划建设和测区经济社会发展提供基础地质资料和科学依据。

Main geohazard types in Longling segment of the Dali-Ruili railway, western Yunnan and their development characteristics

Longling area along the Dali-Ruili railway is located in western Yunnan canyon area of Yunnan Plateau, in the watershed zone between the Nujiang River and the Irrawaddy River drainages, where new tectonic movement is intense and seismic activity occurs frequently. The rainfall in this area is focus on May~October, and the rainfall intensity is large and concentrated. Because of the complicated geological environment, with the addition of rainfall, human activities and other exterior factors, geohazards such as collapses, landslides and debris flow have repeatedly occurred in this area, which often cause accidents such as washing out paddy fields and forests, destroying highways, bridges and buildings, and personnel casualties. The authors analyzed the distribution, formation conditions and development regularity of main geohazards in this area. The result obtained provides a geological basis for the planning and construction of the Dali-Ruili railway and social economic development of the surveyed zone.