应用探地雷达探测活动断层
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摘要
在浅覆盖区采用探地雷达探测地震活动断层。通过实验确定出最佳的采集参数和数据处理流程,在雷达剖面上,能够清晰地显示出断层上部的形态特征、上断点埋深和岩土分层。结合钻孔资料,利用雷达剖面上对第四系覆盖的分层结果和上断点所在的层位可以分析和评价断层的活动性。
GPR method has been used to detect active faults under shallow overlay.The best parameters of data gathering and optimal processing procedure of the method have been obtained through expe-riments.The upper conformation and the depth of the top broken points of active faults,as well as the soil structure,can be revealed from the final GRP profiles.With the help of logging information,the activity of active faults can be analyzed and estimated through the GPR profile comprehensive analyzation of the Quaternary structure and the layer position of the top broken-points of active faults.
GPR method has been used to detect active faults under shallow overlay.The best parameters of data gathering and optimal processing procedure of the method have been obtained through expe-riments.The upper conformation and the depth of the top broken points of active faults,as well as the soil structure,can be revealed from the final GRP profiles.With the help of logging information,the activity of active faults can be analyzed and estimated through the GPR profile comprehensive analyzation of the Quaternary structure and the layer position of the top broken-points of active faults.
引文
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[2]徐锡伟.活动断层、地震灾害与减灾对策问题[J].震灾防御技术,2006,1(1):7-13.XU Xi-wei.Active faults,associated earthquake disas-ter distribution and policy for disaster reduction[J].Technology for Earthquake Disaster Prevention,2006,1(1):7-13.
[3]沈建文,蔡长青.地震危险性分析与抗震设防标准的确定[J].地震工程与工程振动,1997,17(2):27-36.SHEN Jian-wei,CAI Chang-qing.Seismic hazard ana-lysis and earthquake resistant level[J].Earthquake En-gineering and Engineering Vibration,1997,17(2):27-36.
[4]吴建平.城市地震活断层探测的地球物理方法[J].国际地震动态,2001(8):2-16.WU Jian-ping.Geophysical methods of seismicaily ac-tive fault detection in cities[J].Recent Developments inWorld Seismology,2001(8):2-16.
[5]何正勤,叶太兰,丁志峰,等.城市活断层探测中的浅层地震勘探方法[J].国际地震动态,2001(3):1-6.HE Zheng-qin,YE Tai-lan,DING Zhi-feng,et al.Theapplication of shallow seismic prospecting methods toactive fault dectection in cities[J].Recent Develop-ments in World Seismology,2001(3):1-6.
[6]易兵,曾昭发,李恩泽,等.电法探测城市活断层的应用[J].吉林大学学报(地球科学版),2005,35(增刊):115-118.YI Bing,ZENG Zhao-fa,LI En-ze,et al.The survey andresearch for alive fault in city by electrical prospecting[J].Journal of Jilin University(Earth Science Edi-tion),2005,35(Sup.):115-118.
[7]吉林省地质矿产局.吉林省区域地质志[M].北京:地质出版社,1988:176-301.Bureau of Geology and Mineral Resources of JilinProvince.Regional geology of Jilin Province[M].Bei-jing:Geological Publishing House,1988:176-301.
[8]赵根模,唐仲兴,任峰.影响城市隐伏活断层探查与评价的两个重要问题[J].地震,2003,23(1):36-40.ZHAO Gen-mo,TANG Zhong-xing,REN Feng.Twoimportant problems of influence in the survey and eva-luation of the buried active fault in city[J].Earth-quake,2003,23(1):36-40.
[9]周本刚,沈得秀.地震安全性评价中若干地震地质问题探讨[J].震灾防御技术,2006,1(2):113-120.ZHOU Ben-gang,SHEN De-xiu.Discussion on somegeological problems in earthquake safety evaluation[J].Technology for Earthquake Disaster Prevention,2006,1(2):113-120.
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