DIAGRAMS CONSIDERING WELL RESISTANCE FOR DESIGNING SPACING RATIO OF GRAVEL DRAINS
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概要
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The finite difference method is applied to numerical analysis of the effectiveness of gravel drains constructed to prevent liquefaction of sandy soils due to earthquake motion. The basic equation used here is the axisymmetric diffusion equation which includes the generation of excess pore water pressure. The arcsin function of the equivalent cycle ratio formulated by Seed and Booker is used as the pore pressure buildup curve under undrained conditions. A comparison with the results of in-situ experiments reveals that the well resistance of the drain wells should be considered in the gravel drain design, and that the numerical method is valid for the pore pressure prediction. The analytical results are summarized as a set of diagrams in order to provide a convenient basis for the drain spacing design which takes well resistance into account. These diagrams permit drain spacing to be directly decided without the need for a computer. The application range of these diagrams is markedly wider than those of several existing diagrams currently used.
- 社団法人地盤工学会の論文
- 1988-09-15
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関連論文
- Diagrams Considering Well Resistance for Designing Spacing Ratio of Gravel Drains(尾上篤生著本誌28巻3号 1988年掲載)
- 異方性多層地盤のドレーン圧密に関する数値解析(その1)
- CONSOLIDATION BY VERTICAL DRAINS TAKING WELL RESISTANCE AND SMEAR INTO CONSIDERATION
- DIAGRAMS CONSIDERlNG WELL RESISTANCE FOR DESIGNING SPACING RATIO OF GRAVEL DRAINS
- CONSOLIDATION BY VERTICAL DRAINS TAKING WELL RESISTANCE AND SMEAR INTO CONSIDERATION
- DIAGRAMS CONSIDERING WELL RESISTANCE FOR DESIGNING SPACING RATIO OF GRAVEL DRAINS
- CONSOLIDATION OF MULTILAYERED ANISOTROPIC SOILS BY VERTICAL DRAINS WITH WELL RESISTANCE
- 異方性多層地盤のドレーン圧密に関する数値解析(その2) : 測定値に基づくドレーン圧密遅延要因の二, 三の考察