镇海港区高桩码头单桩与排桩数值模拟差异分析

Analysis of Numerical Simulation Difference of Single Pile and Row Pile of Piled Berth Structure at Zhenhai Harbor

笔者对宁波舟山港镇海港区某已建高桩码头桩基进行模拟。在加载后对结果进行分析,得出分析结果:单桩结构模拟结果受力小于排桩结构,在对实际工程进行工程仿真时应该尽量建立全面的有限元模型,不能用一根桩的模型代替所有受力桩体;排桩结构桩体打设深度在27.5 m处,其摩擦应力达到最大,且桩群中,外侧桩的受力大于内侧桩约4%,在实际工程设计或老码头桩基分析中应考虑应力较大位置及桩体在桩基中排布位置的强度设计。

A piled berth structure at Zhenhai harbor of Ningbo Zhoushan port is simulated and analyzed under the loading condition.The results show that the stress acting on single pile is less than that of row pile,thus a comprehensive finite element model shall be established for the engineering simulation of actual projects instead of single pile model working for all stressed piles.The row-pile structure is driven into the stratum at the depth of 27.5 m where the friction stress reaches the maximum value.As for a pile cluster,the stress acting on the outer pile is about 4%more than that of the inner pile.In the actual engineering design or the pile foundation analysis of antiquated berth structure,the strength design of high-stress position and pile layout should be considered.