郑州龙湖工程建设中的环境地质问题分析
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摘要
采用野外调查、试验及模拟计算的方法,在分析龙湖区地质背景及现状条件的基础上,对规划龙湖建设前后可能产生的环境地质问题进行综合分析。研究结果表明:龙湖在建设过程中存在潜蚀及边坡失稳的可能;蓄水运行后会引起地下水位抬升,造成湖岸区部分土体密度增大、压缩系数增大、压缩模量减小、c和φ值减小、强度降低、地震液化指数增大、局部地区存在浸没及土壤次生盐渍化等问题。为郑州龙湖工程科学规划及建设提供了一定的地质依据。
Based on analysis of the geological background and present situation of Longhu Lake,environmental geological problems that may occur before and after the construction of Longhu Lake are synthetically analyzed through survey,test and simulation calculations.The research results indicate the possibility of suffosion and slope instability during the construction of Longhu Lake.After impounding and operation,the groundwater level will rise,resulting in some problems,including an increase of density,an increase of compressibility,a decrease of the compression modulus,a decrease in the value of c and φ,a decrease of strength,an increase in the earthquake liquefaction index,local submersion,and soil secondary salinization.This study provides a geological basis for the scientific planning and construction of the Longhu Lake project.
Based on analysis of the geological background and present situation of Longhu Lake,environmental geological problems that may occur before and after the construction of Longhu Lake are synthetically analyzed through survey,test and simulation calculations.The research results indicate the possibility of suffosion and slope instability during the construction of Longhu Lake.After impounding and operation,the groundwater level will rise,resulting in some problems,including an increase of density,an increase of compressibility,a decrease of the compression modulus,a decrease in the value of c and φ,a decrease of strength,an increase in the earthquake liquefaction index,local submersion,and soil secondary salinization.This study provides a geological basis for the scientific planning and construction of the Longhu Lake project.
引文
[1]中国地质大学(北京),河南省郑州地质工程勘察院.龙湖水系对水文地质、工程地质和生态环境影响分析主要成果报告[R].北京:中国地质大学(北京),2004.
[2]水利部黄河水利委员会勘测规划设计研究院.郑东新区龙湖水系工程工程地质勘察报告(可行性研究阶段)[R].郑州:水利部黄河水利委员会勘测规划设计研究院,2003.
[3]常士骠,张苏民,项勃,等.工程地质手册[M].3版.北京:中国建筑工业出版社,1992.
[4]GB 50011—2001,建筑抗震设计规范[S].
[5]高茂生,陈鸿汉,李桂荣,等.郑州市龙湖成湖方案研究[J].地学前缘,2005(特刊):107-111.
[6]河南省地质矿产勘查开发局第二水文地质工程地质队,武汉地质学院工程地质教研室.郑州市浅层土体特征及工程地质问题研究报告[R].郑州:河南省地质矿产勘查开发局第二水文地质工程地质队,1986.
[2]水利部黄河水利委员会勘测规划设计研究院.郑东新区龙湖水系工程工程地质勘察报告(可行性研究阶段)[R].郑州:水利部黄河水利委员会勘测规划设计研究院,2003.
[3]常士骠,张苏民,项勃,等.工程地质手册[M].3版.北京:中国建筑工业出版社,1992.
[4]GB 50011—2001,建筑抗震设计规范[S].
[5]高茂生,陈鸿汉,李桂荣,等.郑州市龙湖成湖方案研究[J].地学前缘,2005(特刊):107-111.
[6]河南省地质矿产勘查开发局第二水文地质工程地质队,武汉地质学院工程地质教研室.郑州市浅层土体特征及工程地质问题研究报告[R].郑州:河南省地质矿产勘查开发局第二水文地质工程地质队,1986.
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