To consider the shape effect of band prefabricated vertical drain (PVD), an elliptical cylindrical equivalent model of PVD-improved foundation including horizontal and vertical drainage is built, and then the analytical solutions of the excess pore-water pressure and the degree of consolidation under a combined vacuum pressure with time-dependent surcharge load are derived. For the elliptical cylindrical equivalent model, the determinations of parameters related to well resistance and smear effect are discussed. Based on the present solutions, existing commonly-used methods for settlement prediction are remedied and applied in four cases with different loading histories and known parameters. Satisfactory agreement between predictions and measured data verifies the rationality and adoptability of the present methodology to predict settlement. A comprehensive method to predict settlement is presented for practical application.

考虑带式预制垂直排水管（PVD）的形状效应，建立了包括水平排水和垂直排水在内的PVD改进地基椭圆柱体等效模型，然后得到了超孔隙水压力和固结度的解析解。推导出具有时间依赖的超载载荷的组合真空压力。针对椭圆柱等效模型，讨论了井阻和涂抹效应相关参数的确定。基于现有的解决方案，对现有的常用沉降预测方法进行了修正，并在四种不同加载历史和已知参数的情况下应用。预测和实测数据之间的令人满意的一致性验证了本方法预测沉降的合理性和适用性。