TEMPORAL VARIATION OF SEDIMENTARY STRUCTURE OF DREDGED SOIL LAYER IN AN ARTIFICIAL INTERTIDAL FLAT: FOLLOW UP RESEARCH USING MASW AND ITS VERIFICATION

• WATABE Yoichi

  港湾空港技術研究所 土質研究チーム

• SASSA Shinji

  港湾空港技術研究所 動土質研究チーム

• KANEKO Takashi

  港湾空港技術研究所 土質研究チーム

• UENO Kazuhiko

  五洋建設（株）土木設計部

• YAMADA Koichi

  五洋建設（株）技術研究所

• HASHIMOTO Yuji

  応用地質（株）エンジニアリング本部

Bibliographic Information

Other Title

• 人工干潟に埋め立てられた浚渫土砂構造の時間変化：MASWによる継続調査とその検証

Abstract

 Dredged soils from navigation channel or anchorage area have been used in construction of artificial intertidal flat in various regions in Japan. Temporal variation of the dredged soils confined in the intertidal flat, however, has not been clarified yet. In this study, follow up research at an artificial intertidal flat in the Tokuyama-Kudamatsu Port, Yamaguchi, Japan, was conducted for several years after the construction in 2008. Shear wave velocity of only 25 m/s was obtained by MASW in the extremely soft sediments, and this value was verified by a seismic cone test. The gradual increase in shear strength with elapsed time was caused by not only decrease of water content (decrease of void ratio, i.e., densification) in association with consolidation but also chemical bonding in association with thixotropy.

Journal

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

  Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) 71 (2), I_826-I_831, 2015

  Japan Society of Civil Engineers

Keywords

• shear wave velocity
• multi-channel analysis of surface waves
• artificial intertidal flat
• consolidation
• thixotropy

Details

• CRID: 1390001205352519808
• NII Article ID: 130005097485
• DOI: 10.2208/jscejoe.71.i_826
• ISSN: 21854688
• Web Site: https://www.jstage.jst.go.jp/article/jscejoe/71/2/71_I_826/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed