厦门翔安隧道海域工程物探
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摘要
研究目的:在我国大陆地区第一座海底隧道——厦门翔安隧道的工程地质勘探中,通过研究地震反射波法的资料采集、处理和解释中的关键技术和难点,利用物探手段有效地解决海底隧道的工程地质问题,减少水上钻探的昂贵费用并缩短勘探工期。研究结论:在资料采集中,施测时间选择在海域平潮期间;在资料处理中,需把非规则多次覆盖观测系统转换成规则观测系统,通过加密速度分析点,提高资料处理质量;在资料解释中,归纳出时间剖面图中不同地质情况所对应的特征:淤泥较厚地段,海底界面反映为连续性好、频率高、能量低的反射波组;存在覆盖层时,显示为3个连续性较好的反射波组,无覆盖层时,显示为2个连续性较好的反射波组;存在裂隙或岩脉时,反射波组发生断开或上下位移。
Research purposes:For the geological prospecting for Xiang'an Submarine Tunnel in Xiamen(the first submarine tunnel in mainland of china),the research is done on how to effectively solve the engineering geological problems with geophysical prospecting method,such as how to collect,process and interpret the data when using the seismic reflection prospecting for submarine tunnel,for the purpose of reducing the expense of prospecting and shortening the prospecting period.Research conclusions:The data collection must be conducted during sea slack tide.The non-regulation observation system of reflection seismic exploration must be transferred to regulation observation system,and quality of data processing can be improved by density of the velocity analysis points.In the data interpretation,the characteristics corresponding to the different geological conditions in the time reflection profiles are summed up.Namely,the reflection line-ups of nicer continuity,higher frequency and lower amplitude correspond to the seabed with thicker silt,the indication of three continuous reflection line-ups correspond to the stratum covered by soil,indication of two continuous reflection line-ups correspond to the stratum with no cover of soil,and when the reflection line-ups occurrs twist or disconnection,it corresponds to the cranny or the rock-vein.
Research purposes:For the geological prospecting for Xiang'an Submarine Tunnel in Xiamen(the first submarine tunnel in mainland of china),the research is done on how to effectively solve the engineering geological problems with geophysical prospecting method,such as how to collect,process and interpret the data when using the seismic reflection prospecting for submarine tunnel,for the purpose of reducing the expense of prospecting and shortening the prospecting period.Research conclusions:The data collection must be conducted during sea slack tide.The non-regulation observation system of reflection seismic exploration must be transferred to regulation observation system,and quality of data processing can be improved by density of the velocity analysis points.In the data interpretation,the characteristics corresponding to the different geological conditions in the time reflection profiles are summed up.Namely,the reflection line-ups of nicer continuity,higher frequency and lower amplitude correspond to the seabed with thicker silt,the indication of three continuous reflection line-ups correspond to the stratum covered by soil,indication of two continuous reflection line-ups correspond to the stratum with no cover of soil,and when the reflection line-ups occurrs twist or disconnection,it corresponds to the cranny or the rock-vein.
引文
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[2]广东核力工程勘察院.厦门市东通道工程项目预可行性研究阶段工程地质综合勘察报告[Z].广州:广东核力工程勘察院,2001.Guangdong Nuclear-powered Engineering Geological Exploration Institute.The Record about Comprehensive Geological Exploration on East Chunnel in Xiamen at Prophase of Peasible Investigation[Z].Guangdong Nuclear-powered Engineering Geological Exploration Institute,2001.
[3]中国地震局地球物理研究所.厦门市东通道工程场地地震安全性评价报告[R].北京:中国地震局地球物理研究所,2002.Institute of Geophysics,China Earthquake Administration.The Record on Site about Seismic Security Evaluation on East Chunnel in Xiamen[R].Beijing:Institute of Geophysics,China Earthquake Administration,2002.
[4]北京大学,等.地震勘探数字技术[M].北京:科学出版社,1974.Beijing Unversity,etc.Numeric Technology about Seismic Exploration[M].Beijing:Scientific Publications Inc,1974.
[5]长春地质学院,成都地质学院,武汉地质学院.地震勘探——原理和方法[M].北京:地质出版社,1980.Changchun Institute of Geology,Chengdu Institute of Geology,Wuhan Institute of Geology.Seismic Exploration-Principle and Method[M].Beijing:Geological Publications Inc,1980.
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[7]Claerout J F.Fundamenttals of Geophysical Data Processing.Blackwell Scientific Publications Inc.1976.
[8]Telford W M,etc.Applied Geophysics.Cambridge University Press,1984.
[9]Yilmaz O.Seismic Data Processing.Tusa,Society of Exploration Geophysicists,1987.
[10]Yilmaz O.Seismic Data Analysis,Second Edition.Tusa,Society of Exploration Geophysicists,2001.
[2]广东核力工程勘察院.厦门市东通道工程项目预可行性研究阶段工程地质综合勘察报告[Z].广州:广东核力工程勘察院,2001.Guangdong Nuclear-powered Engineering Geological Exploration Institute.The Record about Comprehensive Geological Exploration on East Chunnel in Xiamen at Prophase of Peasible Investigation[Z].Guangdong Nuclear-powered Engineering Geological Exploration Institute,2001.
[3]中国地震局地球物理研究所.厦门市东通道工程场地地震安全性评价报告[R].北京:中国地震局地球物理研究所,2002.Institute of Geophysics,China Earthquake Administration.The Record on Site about Seismic Security Evaluation on East Chunnel in Xiamen[R].Beijing:Institute of Geophysics,China Earthquake Administration,2002.
[4]北京大学,等.地震勘探数字技术[M].北京:科学出版社,1974.Beijing Unversity,etc.Numeric Technology about Seismic Exploration[M].Beijing:Scientific Publications Inc,1974.
[5]长春地质学院,成都地质学院,武汉地质学院.地震勘探——原理和方法[M].北京:地质出版社,1980.Changchun Institute of Geology,Chengdu Institute of Geology,Wuhan Institute of Geology.Seismic Exploration-Principle and Method[M].Beijing:Geological Publications Inc,1980.
[6]李政文,赵志超.地震勘探资料解释[M].北京:地质出版社,1988.Li Zhengwen,Zhao Zhichao.Seismic Data Interpretation[M].Beijing:Geological Publications Inc,1988.
[7]Claerout J F.Fundamenttals of Geophysical Data Processing.Blackwell Scientific Publications Inc.1976.
[8]Telford W M,etc.Applied Geophysics.Cambridge University Press,1984.
[9]Yilmaz O.Seismic Data Processing.Tusa,Society of Exploration Geophysicists,1987.
[10]Yilmaz O.Seismic Data Analysis,Second Edition.Tusa,Society of Exploration Geophysicists,2001.
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