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综合多频率地质雷达天线探测活断层浅层结构—以玉树活动断裂为例

张迪 吴中海 李家存 刘绍堂 王果

张迪, 吴中海, 李家存, 等, 2019. 综合多频率地质雷达天线探测活断层浅层结构—以玉树活动断裂为例. 地质力学学报, 25 (6): 1138-1149. DOI: 10.12090/j.issn.1006-6616.2019.25.06.097
引用本文: 张迪, 吴中海, 李家存, 等, 2019. 综合多频率地质雷达天线探测活断层浅层结构—以玉树活动断裂为例. 地质力学学报, 25 (6): 1138-1149. DOI: 10.12090/j.issn.1006-6616.2019.25.06.097
ZHANG Di, WU Zhonghai, LI Jiacun, et al., 2019. THE APPLICATION OF MULTI-FREQUENCY GPR ANTENNA FOR IMAGING THE SHALLOW SUBSURFACE FEATURES IN THE YUSHU ACTIVE FAULT. Journal of Geomechanics, 25 (6): 1138-1149. DOI: 10.12090/j.issn.1006-6616.2019.25.06.097
Citation: ZHANG Di, WU Zhonghai, LI Jiacun, et al., 2019. THE APPLICATION OF MULTI-FREQUENCY GPR ANTENNA FOR IMAGING THE SHALLOW SUBSURFACE FEATURES IN THE YUSHU ACTIVE FAULT. Journal of Geomechanics, 25 (6): 1138-1149. DOI: 10.12090/j.issn.1006-6616.2019.25.06.097

综合多频率地质雷达天线探测活断层浅层结构—以玉树活动断裂为例

doi: 10.12090/j.issn.1006-6616.2019.25.06.097
基金项目: 

国家自然科学基金项目 U1704124

中国地质调查局项目 1212011120163

中国地质调查局项目 12120114002101

河南省重点研发与推广专项 182102310001

河南省重点研发与推广专项 192102310001

河南省高等学校重点科研项目 19A420007

河南省社会科学规划项目 2016BJJ010

详细信息
    作者简介:

    张迪(1987-), 男, 博士, 讲师, 主要从事三维信息获取与地质应用。E-mail:zhangdi1987228@163.com

    通讯作者:

    李家存(1974-), 男, 博士, 副教授, 主要从事遥感技术应用与研究。E-mail:lijiacun@cnu.edu.cn

  • 中图分类号: P546;P631

THE APPLICATION OF MULTI-FREQUENCY GPR ANTENNA FOR IMAGING THE SHALLOW SUBSURFACE FEATURES IN THE YUSHU ACTIVE FAULT

  • 摘要: 地质雷达技术具有操作性强、分辨率高、探测深度深、对地表环境无破坏和可重复探测等特点,在活断层探测中具有很大的优势。为验证综合多中心频率地质雷达天线探测活断层地下浅层结构效果,以民主村处发育的玉树活动断裂为研究对象,采用25 MHz、100 MHz、250 MHz和500 MHz中心频率的地质雷达天线对活断层浅层结构进行探测,并与探槽剖面进行效果对比。研究结果表明:低中心频率的地质雷达天线(25 MHz和100 MHz)可获取大范围内深度较深(约32 m)的活断层地下浅层结构的整体形态,从雷达图像上可识别出主断层分布范围、断层倾向及地下浅层结构等;而中高中心频率的地质雷达天线(250 MHz和500 MHz)则可获取局部范围内深度较浅(约3 m)的地下浅层结构,尤其是500 MHz天线。探测结果与地表构造地貌形态和探槽剖面地质构造一致,表明综合多中心频率地质雷达天线探测玉树活动断裂浅层结构的有效性和适用性,为活断层研究提供多尺度数据及方法支持。

     

  • 图  1  地质雷达工作原理示意图

    Figure  1.  The principle of ground penetrating radar

    图  2  研究区地质概况

    Figure  2.  Geological survey of the Yushu active fault zone

    图  3  研究点地貌概况及GPR测线剖面

    Figure  3.  Geomorphologic overview of the study area and the GPR survey lines

    图  4  不同中心频率地质雷达天线的数据采集方式

    Figure  4.  Data acquisition of different frequency GPR antennas

    图  5  GPR图像处理流程

    Figure  5.  Flow chart of GPR data processing

    图  6  25 MHz、100 MHz、250 MHz和500 MHz二维剖面图

    Figure  6.  The 2D profiles of 25 MHz, 100 MHz, 250 MHz and 500 MHz

    图  7  500 MHz地质雷达剖面与探槽剖面图(南侧断层陡坎)

    Figure  7.  The 500 MHz GPR profile and the trench wall of the fault scarp in the south of the study site

    表  1  地质雷达剖面位置及天线采集参数

    Table  1.   The location and acquisition parameters of different GPR antennas

    GPR测线剖面 开始位置经度/维度 结束位置经度/维度 剖面长度/m 天线类型 天线频率/MHz 道间距/m 时间窗口/纳秒
    测线1 32.9871°/96.9990° 32.9886°/96.9998° 140 RTA 25 0.3 1750
    测线2 32.9879°/96.9993° 32.9883°/97.0000° 71 RTA 100 0.1 553
    测线3 32.9879°/96.9993° 32.9883°/97.0000° 71 屏蔽天线 250 0.05 160
    测线4 32.9879°/96.9993° 32.9883°/97.0000° 71 屏蔽天线 500 0.02 80
    下载: 导出CSV
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出版历程
  • 收稿日期:  2019-05-21
  • 修回日期:  2019-09-04
  • 刊出日期:  2019-12-31

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