穿越“地质博物馆”的成昆铁路
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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。
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.
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.
引文
[1] 中国人民解放军建字七三○部队.区域水文地质普查报告(西昌幅)[M].北京:地质出版社,1973．
[2] 中国科学院中国自然地理编辑委员会.中国自然地理地貌[M].北京:科学出版社,1980．
[3] 成昆铁路技术总结委员会.成昆铁路(第二册)[M].北京:铁道出版社,1980．
[2] 中国科学院中国自然地理编辑委员会.中国自然地理地貌[M].北京:科学出版社,1980．
[3] 成昆铁路技术总结委员会.成昆铁路(第二册)[M].北京:铁道出版社,1980．
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