【摘要】 成昆铁路穿行于地形险峻的崇山峻岭,沿线断裂、褶皱发育,新构造运动活跃,地震烈度高,差异风化严重,岩体破碎、山坡不稳,发育有规模巨大的滑坡、泥石流、崩塌落石、岩堆,广泛分布含盐地层和工程地质特性特殊的成都黏土(膨胀土)、昔格达组、龙街层、元谋组。此外,沿线水文地质条件也极为复杂,含盐、芒硝、石膏地层中的地下水,有强烈的硫酸盐侵蚀。因此,该线素有"地质博物馆"之称。更多还原

【Abstract】 Cheng-Kun Railway Line crosses through lofty and precipitous peaks.Along the line,fracturation and fold are developed here;the neotectonic movement is active,earthquake intensity is strong,and differenti- al weathering is serious.The rock mass is fragmentized,the mountainside is unstable;landslip,mud-rock flow,collapse,rock fall and rock pile are developed in large scale.The saline stratum and soils with special en- gineering geology characteristics,such as Chengdu clay(swelling clay),Xigeda formation,Longjie bed and Yuanmo formation are distributed widely here.In addition,the hydro-geological condition is very complex. The ground water from the stratum which contains salt,glauber salt and gypsum has strong sulfate erosivi- ty.Thus,this line is called the Geological Repository.更多还原