MONITORING FOR SEDIMENT STRUCTURE AT ARTIFICIAL INTERTIDAL FLATS BY MEANS OF MASW: APPLICABILITY OF HYDROPHONES AT SUBMERGED REGIONS

• WATABE Yoichi

  海上・港湾・航空技術研究所 港湾空港技術研究所 地盤研究領域 土質研究グループ

• SASSA Shinji

  海上・港湾・航空技術研究所 港湾空港技術研究所 地盤研究領域 動土質研究グループ

• KANEKO Takashi

  海上・港湾・航空技術研究所 港湾空港技術研究所 地盤研究領域 土質研究グループ

• HASHIMOTO Yuji

  応用地質（株）関西支社技術部

Bibliographic Information

Other Title

• 人工干潟におけるMASWによる浚渫土砂構造モニタリング：水没エリアでのハイドロフォンの適用

Abstract

 Temporal variation of soil properties of the reclaimed dredged soil and sand capping at an artificial intertidal flat has been monitored by means of multi-channel analysis of surface waves (MASW). MASW survey has been conducted using geophones during an exposure period; however, it cannot be continued when the survey array submerges even in the period of ebb-tide because of large consolidation settlement. In the present study, MASW survey using hydrophones is applied to the submerged region to continue monitoring the soil properties. The results obtained by MASW survey using hydrophones are similar to those obtained by MASW survey using geophones; however, there is a tendency that the sand capping is evaluated slightly thinner and the bottom boundary of the very soft soil layer is unclear in the MASW survey with hydrophones, because seismic attenuation in the soft soil layers is significant.

Journal

• Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering)

  Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) 72 (2), I_449-I_454, 2016

  Japan Society of Civil Engineers

Keywords

• shear wave velocity
• multi-channel analysis of surface waves
• geophone
• hydrophone
• artificial intertidal flat

Details

• CRID: 1390282680329536384
• NII Article ID: 130005263371
• DOI: 10.2208/jscejoe.72.i_449
• ISSN: 21854688
• Web Site: https://www.jstage.jst.go.jp/article/jscejoe/72/2/72_I_449/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed