SETTLEMENT BEHAVIOR OF A TALL BUILDING SUPPORTED BY FRICTION PILES : Part 1 Observation Results and its Consideration

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  • 摩擦杭で支持された高層建物の沈下挙動 : 第1報 観測結果とその考察
  • 摩擦杭で支持された高層建物の沈下挙動-1-観測結果とその考察
  • マサツ クイ デ シジサレタ コウソウ タテモノ ノ チンカ キョドウ 1 カ
  • Settlement behavior of a tall building supported by friction piles

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A tall building completed in April, 1994 in Niigata has been supported by friction piles due to local foundation characteristics. The project gave an opportunity to perform pre-monitoring settlement analysis, as well as to monitor the foundation behavior during a period of about 3 years, commencing at the initiation of construction and terminating 9 months after completion of the building. The main observation results are : The final maximum foundation settlement was 22mm, including 4mm in the last 9 months. As differential settlement of foundation increased, earth pressure and axial force on pile head were redistributed by the structural rigidity. With the increase in water pressure, the load shearing ratio between pile head and foundation slab varied from 2:1 to 4:1. It was comfirmed that foundation settlement under construction may be controlled to some extent by managing pumping water.

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