ハシモト タカオ   HASHIMOTO Takao
  橋本 隆雄
   所属   理工学部 理工学科(工学研究科 建設工学専攻(修士課程),応用システム工学専攻(博士課程))
   職種   教授
言語種別 日本語
発行・発表の年月 2015/12
形態種別 学術雑誌
査読 査読あり
招待 招待あり
標題 New project to prevent liquefaction-induced damage in a wide existing residential area by lowering the ground water table
執筆形態 共著
掲載区分国外
著者・共著者 Yasuda, S.,Hashimoto,T.
概要 In residential areas where liquefaction occurred during the 2011 Great East Japan Earthquake, houses, roads, water pipes, sewage pipes and gas pipes were damaged, interrupting daily life. Though settled and tilted houses were repaired by uplifting, the ground in the whole area, including around lifelines and roads, must be treated by special measures to prevent re-liquefaction. A project to improve the liquefiable soil of an entire area by lowering the ground water table started in November 2011. Based on case studies at sites of damaged and undamaged houses, a water table of about GL-3m was judged to be appropriate to prevent damage due to liquefaction. In-situ tests clarified that the pore water pressure decreased due to dewatering only at shallow depths and that subsidence was small.