Identification of a Soil Liquefied Layer due to the 2011 off the Pacfic coast of Tohoku Earthquake Using X-ray CT Scan Imaging:

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  • Taira Asahiko
    Japan Agency for Marine-Earth Science and Technology The Civil Engineering, Construction and Geology Working Group of Maihama 3-chome Project Team for Recovery from the Great Disaster
  • Iijima Koichi
    Japan Agency for Marine-Earth Science and Technology
  • Igarashi Chiaki
    Japan Agency for Marine-Earth Science and Technology
  • Sakai Saburo
    Japan Agency for Marine-Earth Science and Technology
  • Sakaguchi Hide
    Japan Agency for Marine-Earth Science and Technology
  • Sakaguchi Arito
    Japan Agency for Marine-Earth Science and Technology
  • Kikawa Eiichi
    Japan Agency for Marine-Earth Science and Technology
  • Kanamatsu Toshiya
    Japan Agency for Marine-Earth Science and Technology
  • Yamamoto Yuzuru
    Japan Agency for Marine-Earth Science and Technology
  • Azuma Wataru
    Japan Agency for Marine-Earth Science and Technology
  • Tanaka Tomoyuki
    Marine Works Japan, LTD.
  • Nishimura Masahiro
    Marine Works Japan, LTD.
  • Suzuki Takahiro
    Marine Works Japan, LTD.
  • Kido Yoshiki
    Marine Works Japan, LTD.
  • Watanabe Naoto
    KFC Co. Ltd.
  • Okuno Minoru
    KFC Co. Ltd.
  • Inoue Takeshi
    KFC Co. Ltd.
  • Mayuzumi Hiroshi
    Kawasaki Geological Engineering Co. Ltd.
  • Oda Tomoya
    Kawasaki Geological Engineering Co. Ltd.
  • Hamada Taiji
    Kawasaki Geological Engineering Co. Ltd.
  • Muroyama Takuo
    Kawasaki Geological Engineering Co. Ltd.
  • Takao Ino
    The Civil Engineering, Construction and Geology Working Group of Maihama 3-chome Project Team for Recovery from the Great Disaster
  • Takashina Jitsuo
    The Civil Engineering, Construction and Geology Working Group of Maihama 3-chome Project Team for Recovery from the Great Disaster
  • Katsumata Hidenobu
    The Civil Engineering, Construction and Geology Working Group of Maihama 3-chome Project Team for Recovery from the Great Disaster
  • Harada Naoshi
    The Civil Engineering, Construction and Geology Working Group of Maihama 3-chome Project Team for Recovery from the Great Disaster
  • Fumiaki Nishida
    The Civil Engineering, Construction and Geology Working Group of Maihama 3-chome Project Team for Recovery from the Great Disaster
  • Minamikawa Hiroyuki
    The Civil Engineering, Construction and Geology Working Group of Maihama 3-chome Project Team for Recovery from the Great Disaster
  • Kanetaka Yoshinao
    The Civil Engineering, Construction and Geology Working Group of Maihama 3-chome Project Team for Recovery from the Great Disaster

Bibliographic Information

Other Title
  • ボーリングコアのX線CTスキャン解析による東北地方太平洋沖地震における地盤液状化層の同定：
  • ボーリングコアのX線CTスキャン解析による東北地方太平洋沖地震における地盤液状化層の同定 : 浦安市舞浜3丁目コア試料の例
  • ボーリングコア ノ Xセン CT スキャン カイセキ ニ ヨル トウホク チホウ タイヘイヨウオキ ジシン ニ オケル ジバン エキジョウカソウ ノ ドウテイ : ウラヤスシ マイハマ 3チョウメ コア シリョウ ノ レイ
  • An Example from Core Samples from Maihama 3-chome, Urayasu City
  • 浦安市舞浜3丁目コア試料の例

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Abstract

The 2011 off the Pacfic coast of Tohoku Earthquake caused an unprecedented and widespread soil liquefaction event especially in the southern part of the Kanto district. An improved understanding of the complex liquefaction processes involved and especially identification of the liquefaction layer, is needed to understand and mitigate against such events. We report here for the first time the application of X-ray computerized tomography (CT) scanning to core samples of the soft and water-saturated near-surface formations subjected to liquefaction. Our results clearly show images of the different sedimentary units and their internal structure, including ripple laminations and load casts. One unit was identified where the original sedimentary structures have been completely obliterated, which we interpret to be the zone of liquefaction. Our results show that X-ray CT scanning is a potentially useful tool for soil liquefaction research in the fields of geology and engineering.

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