• Title/Summary/Keyword: 수동형 다중채널 표면파탐사

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The Shear Wave Velocity Analysis using Passive Method MASW in the Center of the Metropolis, Gyeongsan (Passive Method MASW 방법을 이용한 경산시 도심구간에서의 전단파 속도 분석)

  • Lee, Hong-Gyu;Kim, Woo-Hyuk;Jang, Seung-Ik;Lee, Seog-Kyu
    • The Journal of Engineering Geology
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    • v.17 no.4
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    • pp.511-516
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    • 2007
  • Active method MASW(Multi channel Analysis of Surface Waves), which is one of the surface wave exploration methods, has the difficulties to supply enough shear wave velocity log, caused by short spread length and lack of low frequency energy. To make up this defect, the passive method MASW survey is taked and analysised in Daeku subway construction site, Jungpyung-dong Gyeongsan city. The passive method MASW using the microtremor, improve the quality of the overtone record by applying the azimuth correction caused offline sources. And combing with active overtone record which is acquired by same geometry has the benefits of improve shallow depth resolution and extend possible investigation depth. To take the optimized acquisition parameters, the 2m, 4m, and 6m geophone spacing is tested. And 2m spacing overtone image could make the reliable shear wave velocity log.