岸坡对库区码头桩基变形影响分析

Deformation analysis of pier pile in the reservoir area due to slope deformation

在库区桩基码头中,岸坡变形的影响几乎是无法避免的。为此,采用FLAC3D有限差分软件对库区岸坡与码头桩基变形做了比较详尽的分析。分析中根据实际工程情况选择基于有限差分法的莫尔库仑屈服准则,并且对桩与土的相互作用进行了模拟,其中码头桩基采用具有良好力学特性的pile结构单元;根据库区桩基码头的现场观测结果,对重庆市涪陵港区黄旗码头的桩基变形进行了分析,并且对其进行了数值模拟。最后将数值分析结果与现场观测结果进行比较分析,初步找出了库区码头桩基出现较大变形的原因;数值分析的结果比较准确地预测出了施工完成后桩基的大变形,为下一步桩基防护措施的选取和使用提供了参考依据。

The influence of slope deformation on piled wharf in the reservoir area is almost unavoidable. This paper presents a detailed analysis of the deformations using finite difference software FLAC3D. According to the actual engineering situation, the Mohr-Coulomb yield potential was used and the inter-action between piles and soil was simulated, during which, wharf＇s pile foundation adopted the pile structural elements which was characterized by good mechanical properties. According to the site observation data of the piled wharf in the reservoir area, we carried out an analysis of the pile foundation deformation in Huangqi Wharf of Fuling port area in Chongqing, and conducted a numerical simulation for it. Based on the comparison between the numerical analyzing result and the site observation data, we found out the cause of large deformation of pile foundation in the reservoir area; According to the numerical analysis, we forecasted precisely the deformation pile foundation after completion of construction. The analyzing result may serve as references for the next-step seleetion and utilization of the protective measures for the pile foundation.