虎跳峡地区绿泥石化片理状玄武岩工程特性分析
|
摘要
虎跳峡地区的玄武岩经历了复杂的地质作用,岩石的矿物、结构发生了改变,表现出特有的微观地质特征和工程特性。在野外调查、室内及现场原位试验基础上,结合丽江至香格里拉铁路的工程实践,对岩石的矿物组成及化学成分、物理力学性质进行分析。结果表明:绿泥石化片理状玄武岩是热液蚀变及区域变质作用的产物,岩石呈鳞片变晶结构,原生矿物为绿泥石、绿帘石、绢云母等矿物取代,具有软化系数低,饱水系数高,抗风化能力弱等特点。在构造、风化及卸荷作用下,易出现软岩大变形、边坡失稳等地质问题。研究成果为工程方案的选择和措施的设置提供科学依据,对滇西北玄武岩区铁路及公路工程的勘察设计具有指导意义。
The basalt, located in Tiger Leaping Gorge area, has experienced strong alteration and tectonic action, and its mineral and structure changed, exhibited special micro geological characteristics and engineering characteristics. This paper based on the survey, indoor test and in-situ test, and the engineering practice of Lijiang to Shangri-La Railway, the mineral composition and chemical composition, physical and mechanical properties of basalt were studied. The results presented that the chloritized schistosity basalt was the product of hydrothermal alteration and regional metamorphism, the basalt rock is flake crystal structure, its primary minerals are chlorite, epidote and sericite, and with the characteristics of Low softening coefficient, high water saturation coefficient and weak weathering resistance. Under the action of structure, weathering and unloading, it is prone to the geological problems such as large deformation of soft rock and instability of slope. The research results provide a scientific basis for the selection of the project and the setting of measures, and with the guiding significance to the engineering geological exploration, design and construction of basalt in Northwest Yunnan area.
The basalt, located in Tiger Leaping Gorge area, has experienced strong alteration and tectonic action, and its mineral and structure changed, exhibited special micro geological characteristics and engineering characteristics. This paper based on the survey, indoor test and in-situ test, and the engineering practice of Lijiang to Shangri-La Railway, the mineral composition and chemical composition, physical and mechanical properties of basalt were studied. The results presented that the chloritized schistosity basalt was the product of hydrothermal alteration and regional metamorphism, the basalt rock is flake crystal structure, its primary minerals are chlorite, epidote and sericite, and with the characteristics of Low softening coefficient, high water saturation coefficient and weak weathering resistance. Under the action of structure, weathering and unloading, it is prone to the geological problems such as large deformation of soft rock and instability of slope. The research results provide a scientific basis for the selection of the project and the setting of measures, and with the guiding significance to the engineering geological exploration, design and construction of basalt in Northwest Yunnan area.
引文
[1] 孙书勤,黄润秋,张成江,等.峨眉山玄武岩结构面类型及成生规律[J].成都理工大学学报(自然科学版),2015,42(4):463-475.
[2] 沈军辉,王兰生,徐林生,等.峨眉山玄武岩的岩相与岩体结构[J].水文地质工程地质,2001 (6):1-4.
[3] 沈军辉,王兰生,李天斌,等.川西南玄武岩的岩体结构特征[J].成都理工学院学报,2002,29(6):680-685.
[4] 张春生.四川省越西地区峨眉山玄武岩地质及地球化学特征研究[D].成都:成都理工大学,2016.
[5] 魏云杰.中国西南水电工程区峨眉山玄武岩岩体结构特性及其工程应用研究[D].成都:成都理工大学,2007.
[6] 王毅,杨建宏.玄武岩的岩体结构与力学性状研究[J].岩石力学与工程学报,2002,21(9):1307-1310.
[7] 程庭凤.金安桥水电站坝基优化选择及主要地质缺陷处理[J].云南水力发电,2015,31(1):67-71.
[8] 王文远,高键,王昆,等.金安桥水电站坝基裂面绿泥石化岩体利用研究[J].水力发电,2006,32(11):28-29.
[9] 龚婷婷,肖渊甫,邓江红,等.云南省香格里拉县九龙峨眉山玄武岩岩石特征及构造背景[J].矿物学报,2011(S1):165-167.
[10] 吕劲松,肖渊甫,邓江红,等.滇西北峨眉山玄武岩与冈达概组下段玄武岩对比研究[J].岩石矿物学,2011,32(1):73-89.
[11] 张招崇,王福生,郝艳丽,等.峨眉山大火成岩省中苦橄岩与其共生岩石的地球化学特征及其对源区的约束[J].地质学报,2004,4(2):171-180.
[12] 汪云峰,张招崇,王丽娟,等.峨眉山大火成岩省虎跳峡和金安二叠纪玄武岩的地球化学特征及其对源区的约束[J].岩石学报,2013,29(2):4387-4403.
[13] 陈旭,许模,康小兵,等.玄武岩风化程度化学指标及微观特征研究[J].人民长江,2008,39(16):32-34.
[14] 魏云杰,许模,陶连金,等.某水电站坝区峨眉山玄武岩岩体风化特征[J].北京工业大学学报,2009,35(1):53-57.
[15] 杨献忠,杨祝良,陶奎元,等.含油玄武岩中绿泥石的形成温度[J].矿物学报,2002,22(4):365-370.
[16] 张永双,曲永新,刘景儒,等.滇藏铁路滇西北段蒙脱石化蚀变岩的工程地质研究[J].岩土工程学报,2007,29(4):531-536.
[17] 张加桂,张永双,曲永新.滇藏铁路沿线滇藏交界段劈理化带成因探讨及工程效应分析[J].地球学报,2009,30(6):885-892.
[18] 刘景儒,张加桂,张永双,等.滇西北巨厚劈理化带特征及对滇藏铁路的影响研究[J].工程地质报,2007,15(1):1-7.
[19] 王运生,王士天,李渝生.云南中甸-丽江地区新构造特征[J].成都理工学院学报,1999,26(1):68-72.
[20] 张西娟,曾庆利,马寅生.玉龙—哈巴雪山断块差异隆升的基本特征及其地质灾害效应[J].中国地质,2006,33(5):1075-1082.
[21] 李家钰.新鲜岩石抗风化能力分级若干意见[J].铁道标准设计,1993(5):31-33.
[2] 沈军辉,王兰生,徐林生,等.峨眉山玄武岩的岩相与岩体结构[J].水文地质工程地质,2001 (6):1-4.
[3] 沈军辉,王兰生,李天斌,等.川西南玄武岩的岩体结构特征[J].成都理工学院学报,2002,29(6):680-685.
[4] 张春生.四川省越西地区峨眉山玄武岩地质及地球化学特征研究[D].成都:成都理工大学,2016.
[5] 魏云杰.中国西南水电工程区峨眉山玄武岩岩体结构特性及其工程应用研究[D].成都:成都理工大学,2007.
[6] 王毅,杨建宏.玄武岩的岩体结构与力学性状研究[J].岩石力学与工程学报,2002,21(9):1307-1310.
[7] 程庭凤.金安桥水电站坝基优化选择及主要地质缺陷处理[J].云南水力发电,2015,31(1):67-71.
[8] 王文远,高键,王昆,等.金安桥水电站坝基裂面绿泥石化岩体利用研究[J].水力发电,2006,32(11):28-29.
[9] 龚婷婷,肖渊甫,邓江红,等.云南省香格里拉县九龙峨眉山玄武岩岩石特征及构造背景[J].矿物学报,2011(S1):165-167.
[10] 吕劲松,肖渊甫,邓江红,等.滇西北峨眉山玄武岩与冈达概组下段玄武岩对比研究[J].岩石矿物学,2011,32(1):73-89.
[11] 张招崇,王福生,郝艳丽,等.峨眉山大火成岩省中苦橄岩与其共生岩石的地球化学特征及其对源区的约束[J].地质学报,2004,4(2):171-180.
[12] 汪云峰,张招崇,王丽娟,等.峨眉山大火成岩省虎跳峡和金安二叠纪玄武岩的地球化学特征及其对源区的约束[J].岩石学报,2013,29(2):4387-4403.
[13] 陈旭,许模,康小兵,等.玄武岩风化程度化学指标及微观特征研究[J].人民长江,2008,39(16):32-34.
[14] 魏云杰,许模,陶连金,等.某水电站坝区峨眉山玄武岩岩体风化特征[J].北京工业大学学报,2009,35(1):53-57.
[15] 杨献忠,杨祝良,陶奎元,等.含油玄武岩中绿泥石的形成温度[J].矿物学报,2002,22(4):365-370.
[16] 张永双,曲永新,刘景儒,等.滇藏铁路滇西北段蒙脱石化蚀变岩的工程地质研究[J].岩土工程学报,2007,29(4):531-536.
[17] 张加桂,张永双,曲永新.滇藏铁路沿线滇藏交界段劈理化带成因探讨及工程效应分析[J].地球学报,2009,30(6):885-892.
[18] 刘景儒,张加桂,张永双,等.滇西北巨厚劈理化带特征及对滇藏铁路的影响研究[J].工程地质报,2007,15(1):1-7.
[19] 王运生,王士天,李渝生.云南中甸-丽江地区新构造特征[J].成都理工学院学报,1999,26(1):68-72.
[20] 张西娟,曾庆利,马寅生.玉龙—哈巴雪山断块差异隆升的基本特征及其地质灾害效应[J].中国地质,2006,33(5):1075-1082.
[21] 李家钰.新鲜岩石抗风化能力分级若干意见[J].铁道标准设计,1993(5):31-33.