某格形钢板桩码头升级改造方案三维有限元数值分析

Three-dimensional finite element numerical analysis of upgrade and renovation scheme of celled steel sheet pile wharf

某格形钢板桩码头升级改造工程,前沿港池疏浚后改变了格形墙体前板桩埋入深度,影响码头结构稳定性。为了探究改造后格形钢板桩稳定性和破坏形态,利用有限元软件MIDAS GTS,构建适用于格形钢板桩结构稳定性分析的三维有限元数值模型,通过对最不利工况下格形钢板桩改造前后的变形、受力、整体稳定性对比分析,提出复合地基和抗滑桩加固相结合的格形钢板桩码头改造方案。结果表明,码头加固前后的格形钢板桩整体变形、土压力分布、结构内力和地基反力分布基本一致。

In the upgrading and reconstruction project of a celled steel sheet pile wharf,the depth of the sheet pile in front celled wall is changed after dredging the front basin,which affects the stability of the wharf structure.In order to explore the stability and failure mode of celled steel sheet piles after renovation,we use the finite element software MIDAS GTS to build a three-dimensional finite element numerical model suitable for the structural stability analysis of celled steel sheet piles.By comparing and analyzing the deformation,stress and overall stability of celled steel sheet piles before and after renovation under the most unfavorable working conditions,we propose a celled steel sheet pile wharf renovation scheme combined with composite foundation treatment and anti-slide pile reinforcement.The results show that the overall deformation,soil pressure distribution,structural internal force distribution,and subgrade reaction distribution of celled steel sheet piles before and after wharf reinforcement are basically the same.