| 基于SPAC法勘探武汉市江夏区地下岩溶结构 |
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| 引用本文： | 沈雨忆,李井冈,王秋良,魏勇,徐俊.基于SPAC法勘探武汉市江夏区地下岩溶结构[J].大地测量与地球动力学,2018,38(5):482-486. |
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| 作者姓名： | 沈雨忆 李井冈 王秋良 魏勇 徐俊 |
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| 作者单位： | 中国地震局地震研究所(地震大地测量重点实验室);中国地震局地球物理研究所;湖北省城市地质工程院 |
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| 摘 要： | 采用微动台阵方法探测武汉地铁27号线江谭段地下岩溶情况。通过空间自相关法（SPAC）提取瑞利波相速度频散曲线，进而反演各观测台阵的视S波速度结构，并插值完成测线二维视S波速度剖面。结果表明，目标区内地层按视S波速度自上而下可分为4层，其中在第3层存在明显的低速区，推测发育岩溶结构，且规模较大。对比工程钻探结果，SPAC法得到的地层分层、岩溶规模与实际情况基本吻合。
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| 关 键 词： | 微动探测 地层结构 岩溶 频散曲线 SPAC法 |
Application of SPAC Method to Probe Underground Karst Structure in Jiangxia District,Wuhan |
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| SHEN Yuyi,LI Jinggang,WANG Qiuliang,WEI Yong,XU Jun.Application of SPAC Method to Probe Underground Karst Structure in Jiangxia District,Wuhan[J].Journal of Geodesy and Geodynamics,2018,38(5):482-486. |
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| Authors: | SHEN Yuyi LI Jinggang WANG Qiuliang WEI Yong XU Jun |
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| Abstract: | The microtremor array method is used to detect underground Karst in Jiangxia district, Wuhan metro line 27. Based on the spatial autocorrelation theory(SPAC), the Rayleigh wave velocity dispersion curves are extracted, and through the inversion of dispersion curves,acquires the S-wave velocity structure and 2D profile. The results show that the research area top-down can be divided into four layers. The low-speed areas are developed in the third layer, suggesting that low-speed areas would be karst structures and are not small scale. Compared with the engineering drilling chart data, the stratigraphic stratification and Karst scale results of the SPAC method are basically consistent with the actual result. |
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| Keywords: | microtremor survey stratigraphic structure Karst dispersion curve SPAC method |
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