中文摘要：

采用COASTALTOOL软件中的潮流模块TC2D模拟桩绕流问题.通过细网格模型,研究桩断面形状、排列方式及桩心距对桩周围水流的影响.对于粗网格模型中群桩阻力的影响,提出基于阻力叠加原理的有桩单元水流阻力计算公式;对于单元中群桩的遮流作用,提出遮流面积折合水深的概化方法.这种概化计算模式中考虑了群桩中各桩间的遮蔽影响.

英文摘要：

Flow around pile is studied by using the tide module TC2D of COASTALTOOL software. The effects of pile transection shape, array layout and center distance of pile group on the flow around piles are investigated, respectively, by adopting fine grid model. As for the coarse grid model, a calculation formula is proposed for the resistance of pile group inside an element based on the superposition principle of resistance. A simplification method is put forward to account for the shielding effect of pile group in an element by introducing the equivalent water depth for the sheltered area of the piles, by which the shielding effect among piles of a pile group is considered.