回淤环境高桩码头桩基淤积荷载影响因素及简化计算

Influence factors and simplified calculation of sediment load on pile foundations in high-pile wharves under sedimentation conditions

目前高含沙水域高桩码头受淤积影响导致码头位移或桩基受损情况较为普遍,工程设计中考虑淤积荷载影响主要以数值有限元分析为主,计算精度与土体参数及土体本构模型选取有关,工程应用较为不便。通过调研高桩码头淤积现状和受损情况,分析了桩土作用及影响因子,结果表明桩基淤积荷载主要与淤积土体参数、淤积高度、淤积岸坡坡度及桩基的倾斜角度有关;提出了桩基淤积荷载简化计算方法并应用于典型码头实例分析中,计算分析结果与检测实际情况基本吻合,揭示了码头桩基受损原因。该简化计算方法相比于数值有限元分析方法,所用参数均为常规工程参数,计算简单,能较好反映主要影响因素对淤积荷载的影响,可为回淤环境下高桩码头桩基设计提供参考。

Sedimentation in high-siltation waters has become a common issue for high-pile wharves,leading to displacements or damage to pile foundations.Current engineering design practices typically rely on numerical finite element analysis to account for sediment load effects.However,the accuracy of these calculations depends heavily on soil parameters and the selection of constitutive models,making them less practical for general engineering applications.Through a survey of sedimentation and damage conditions in high-pile wharves,this study analyzes the interaction between piles and soil,identifying key influencing factors.The results show that the sediment load on pile foundations is primarily affected by the soil parameters of the sediment,sediment height,slope gradient of the sedimentary bank,and the inclination angle of the piles.A simplified method for calculating the sediment load on pile foundations is proposed and applied to the analysis of a typical wharf case.The calculation results closely align with actual inspection data,revealing the causes of pile foundation damage.Compared to finite element analysis,the simplified method uses conventional engineering parameters,offering easier computation while effectively reflecting the influence of key factors on sediment load.This method can serve as a reference for designing pile foundations in high-pile wharves under sedimentation conditions.