Numerical evaluation of the effects of drainage pipes by the 3D-finite element seepage analysis

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  • 三次元有限要素浸透流解析に基づく排水ボーリング効果の定量的評価法
  • 3ジゲン ユウゲン ヨウソ シントウリュウ カイセキ ニ モトヅク ハイスイ ボーリング コウカ ノ テイリョウテキ ヒョウカホウ

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Abstract

An evaluation method is presented for the effectiveness of horizontal/semi-horizontal drains to reduce ground-water pressures in soil slopes. A system of horizontal/semi-horizontal drains is commonly used to enhance the stability of slopes in which ground-water is the main cause of instability ; this is the usual case for almost all landslide slopes in Japan. Despite its quite frequent use, no design guidelines have been established. In this paper ground-water behavior is solved by the 3D-finite element saturated-unsaturated seepage analysis. One dimensional linear finite elements are incorporated into the 3D-finite element ground-water system to simulate the influence of the drains. An experiment was conducted on a model sandy ground in a metal tank in which perforated drainage pipes were installed. The observed results were compared with the numerical ones, and good agreements were obtained, indicating the usefulness of the proposed method.

Journal

  • Landslides

    Landslides 37 (3), 1-9_1, 2000

    The Japan Landslide Society

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