Study on a Liquefaction Countermeasure for Flume Structure by Sheet-Pile with Drain

Kazutaka Otsushi1, Tomoo Kato2, Takashi Hara3,a, Atsushi Yashima3, Yu Otake4,b, Kazuhiko Sakanashi4 and Ayumi Honda4

1Construction Technology Department, Sumitomo Metal Industries Ltd., Sunayama 16-1, Kamisu, Ibaraki 314-0255, Japan.

2Kiso River Canal Integrated Management Office, Japan Water Agency, Makai-ji Higashi, 26-1 Sofue-cho, Inazawa, Aichi 495-0036, Japan.

3Civil Engineering, Gifu University, Yanagido 1-1, Gifu, Gifu 501-1193, Japan.

4Structure Engineering Division, CTI Engineering Co. Ltd., Nihonbashi-hamacho 3-21-1, Chuo-ku,Tokyo 103-8430, Japan.


Canals are important as lifeline facilities that supply water to urban areas. However, the countermeasure in popular use, such as improvement of entire liquefiable ground of the canal by chemical feeding, is hugely expensive. Against this background, the authors investigated a reasonable liquefaction countermeasure for an existing flume canal using sheet-pile with drain. In this study, several shaking table tests in the 1 g gravitational fields were conducted, and the experimental reproducibility of the analysis was checked to confirm the effectiveness of the proposed countermeasure. The results indicated that the proposed method was effective in reducing the deformation (i.e., uplift/sinking displacement and inclination) of the canal, and good reproducibility for dynamic effective stress FEM analysis using LIQCA code with respect to the results of the experiment was confirmed.

Keywords: Liquefaction countermeasure; flume structure; sheet-pile with drain.

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