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南昆铁路从南宁经云贵高原抵达昆明，全长８６３ｋｍ，相对高差２０００ｍ。沿线地形大起大落，工程极艰巨，许多地段为桥隧相连。自晚元古代至新生代各系地层皆有出露，地处扬子准地台西南缘，断褶带分布密集，活动断裂地段长，地震烈度高达９度，地质及地质构造十分复杂，线路穿於其中，地质灾害繁多。特别是途经４００ｋｍ长碳酸岩地段，岩溶极为发育，桥梁、隧道和路基工程均需进行大量特殊工程设计；强膨胀性膨胀岩地段长，路基等工程深受其害。本文是对上述各类地质灾害的选线设计和采取各种有效措施的论述。
Nanning-Kunming Railway arrived from Nanning through the Yunnan-Yunnan Plateau with a total length of 863km and a relative elevation of 2000m. Along the terrain ups and downs, the project is extremely arduous, many lots for the bridge and tunnel connected. Since Late Proterozoic to Cenozoic strata are exposed, located in the southwestern margin of the Yangtze Platform, the fault fold belt is densely distributed, the active fault is long, earthquake intensity is as high as 9 degrees, geological and geological structure is very complicated, the line wear Among them, many geological disasters. In particular, the 400 km-long carbonate rock passes through the karst with extremely developed karst and a great deal of special engineering design is required for the bridges, tunnels and embankment projects. The projects with long expansive expansive rock and subgrade are badly damaged. This article is a discussion of the above-mentioned various types of geological disasters line selection design and take various effective measures.