LIQUEFACTION POTENTIAL MAP IN TOKYO LOWLAND

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  • 東京低地の液状化予測
  • トウキョウ テイチ ノ エキジョウカ ヨソク

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Abstract

In order to identify liquefaction susceptibility for wide area, it is necessary to have as much information as possible in the area under consideration. In this study, a computer aided system has been developed to facilitate engineering decision-making concerning liquefaction susceptibility. The man-machine interactive system and graphic display capability give an engineer not only the final evaluated result but also information needed to understand the background knowledge on the factors of liquefaction likelihood. The liquefaction potential lots map in Tokyo Lowland was compiled from the indices of liquefaction potential analysis, the information about liquefaction generated during the Kanto earthquake, and the characteristics of geography and geology.<br>The system engineering procedure was useful for the interactive evaluation of a great amount of information and for the decision about poorly defined problems such as the assessment of liquefaction potential mapping. A result of these studies showed that the liquefiable area was about one forth of Tokyo Lowland.

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