水理構造物基礎の対称浸透流場について*

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  • スイリ コウゾウブツ キソ ノ タイショウ シントウ ナガレバ ニ ツイテ
  • Symmetrical Seepage Flow Field under Hydraulic Structures

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The seepage flow through porous media under a hydraulic structure belongs to the confined flow problems, to which the conformal transformations have been applied by many hydraulic engineers. However, when there are more than three sheet-pilings on the bottom of foundation, the analytical method is not effective. In this paper, we deal with such a case that a seepage flow field is symmetric with respect to the y axis (as in Fig. 1(a)). As a result, the uplift pressure distribution on the base of structure is symmetrical to the center of an uplift pressure diagram regardless of the number of cutoff and the total uplift force is equal to the value integrated on condition that uplift pressure distribution is linear.

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