A new prefabricated vertical drain (PVD) with wings has been proposed, and its behaviour has been investigated using laboratory model tests and finite element analysis (FEA). The new PVD uses wings that are aligned perpendicularly to the surface of the PVD and is thus named WPVD. The wings increase the contact area of a WPVD with soil and serve as a horizontal drainage channel, and this can be more economic than a normal PVD with a larger diameter. Both the model test and FEA results show that, compared with a normal PVD, WPVD can increase the consolidation rate of a WPVD unit cell and, even, the final consolidation-induced settlement. The mechanism for the increase in the settlement is that WPVD can reduce the degree of non-uniform consolidation within a WPVD unit cell. The results also indicate that the effect of a WPVD depends on the total surface area of the wings per unit length of a PVD, as well as the ratio of the length (L_s) and width (W_s) of the wing (L_s/W_s). For a given surface area, the larger the L_s/W_s ratio is, the greater the effect of the wing is for increasing the rate of consolidation. Finally, an empirical equation has been established for evaluating the equivalent diameter of a WPVD, with which WPVD-induced consolidation can be analysed using existing PVD consolidation theories.

有人提出了一种新的带有机翼的预制垂直排水管（PVD），并已使用实验室模型测试和有限元分析（FEA）研究了其性能。新的PVD使用垂直于PVD表面对齐的机翼，因此被称为WPVD。机翼增加了WPVD与土壤的接触面积，并用作水平排水通道，这比直径较大的普通PVD更经济。模型测试和FEA结果均显示，与正常PVD相比，WPVD可以提高WPVD晶胞的固结率，甚至可以提高最终固结引起的沉降。沉降增加的机制是WPVD可以减少WPVD单元内的不均匀合并程度。L _s）和机翼的宽度（W _s）（L _s / W _s）。对于给定的表面积，L _s / W _s之比越大，机翼对提高固结率的影响越大。最后，建立了一个经验公式来评估WPVD的当量直径，可以使用现有的PVD固结理论分析WPVD引起的固结。