基于分离变量方法，建立了绕射势的级数解，导出了作用于大直径桩柱上的绕射力的计算公式。
A formal potential solution for the diffraction problem was established, and the computational formulation for the corresponding diffraction force was given.
为了验证井柱桩透水丁坝的分水缓流作用效果，建立单排井柱桩透水丁坝运行时的水量平衡方程，导出了单排井柱桩透水丁坝上下游流速公式。
In order to prove water diversion and retarding action effect of permeable pile groins, the flow velocity formulas above and below the permeable pile groins are derived respectively.
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