地下水位低下工法による液状化対策の実施例

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タイトル別名
  • Case Study on Countermeasure to Liquefaction by Dewatering Method
  • チカ スイイ テイカ コウホウ ニ ヨル エキジョウカ タイサク ノ ジッシレイ

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There are some counter measurements developed for sustaining liquefaction damage. Though the method is theoretically clear, only few example of application.<br />In 1995, Hyogo Nanbu earthquake triggered the liquefaction in the urban and coastal area around Osaka bay containing Tsukiji area. Liquefaction caused many houses tilted, settled and collapsed around the lowland and reclaimed area.<br />In this paper, some damaged structures caused by the liquefaction are introduced. It focuses Tsukiji area, which is about 12km far from the active fault line describing geological profile and ground water environment. Tsukiji area is where the dewatering method was applied as the counter measurement. Land subsidence was caused by pumping groundwater and it caused the leakage from the surrounding sea which has been a concern for local government.<br />This paper shows how to decrease the groundwater level in the area by working from the design concept on installing the permeable pipe in the netlike based upon the site pumping test. As the result, 3m of non liquefaction layer over the groundwater was secured.

収録刊行物

  • 材料

    材料 63 (1), 21-27, 2014

    公益社団法人 日本材料学会

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