淤积荷载作用下高桩码头桩基受力变形特性灵敏度分析

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  • (1. 大连海事大学 交通运输工程学院,辽宁 大连 116026;2.大连海事大学 港口与航运安全协同创新中心,辽宁 大连 116026;3. 中交第三航务工程勘察设计院有限公司,上海 200000;4. 中交第一航务工程勘察设计院有限公司,天津 300222;5. 中交(天津)疏浚工程有限公司,天津 300451)

熊琦(1995 — ),男,博士研究生。主要研究方向为桩-土相互作用数值理论方法研究。E-mail: xqhonesty@163.com;崔春义*(1978 — ),男,教授,博士,博士生导师。主要研究方向为岩土工程数值与解析方法研究。E-mail: cuichunyi@dlmu.edu.cn
崔春义*(1978 — ),男,教授,博士,博士生导师。主要研究方向为岩土工程数值与解析方法研究。E-mail: cuichunyi@dlmu.edu.cn

网络出版日期: 2024-09-18

基金资助

国家重点研发计划(2021YFB2601102);国家自然科学基金面上项目(52178315);中央高校基本科研业务费专项资金项目(3132023504);大连市科技创新基金项目(2022JJ12GX031)

Sensitivity analysis of stress and deformation of piled wharf under siltation

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  • (1. College of Transportation Engineering, Dalian Maritime University, Dalian 116026, China; 2. Center of Ports and Maritime Safety, Dalian Maritime University, Dalian 116026, China; 3. CCCC Third Harbor Consultants Co., Ltd, Shanghai 200000, China; 4. CCCC First Harbor Consultants Co., Ltd, Tianjin 300222, China; 5. Tianjin International Marine Engineering Co., Ltd, Tianjin 300451, China)


Online published: 2024-09-18

摘要

为研究岸坡淤积土体参数对高桩码头桩基受力变形的影响程度,通过建立高桩码头-岸坡相互作用体系数值计算模型,首先采用基准值误差分析法识别岸坡淤积进程中关键淤积阶段,进而分别引入Sobol和TGP两种全局敏感度方法进行淤积土体参数对码头桩基受力变形的敏感程度分析。在此基础上,基于归一化敏感度SVI方法得到淤积土体黏聚力、内摩擦角、弹性模量及泊松比对码头桩基受力变形的敏感重要性排序。计算分析结果表明:淤积土体弹性模量是影响码头桩基受力变形的主要驱动因素;淤积土体参数对桩基在泥面处水平位移的敏感度不受淤积厚度影响,其重要性排序依次为弹性模量、黏聚力、泊松比和内摩擦角。本文的定量结果有利于深入理解泥沙淤积进程中淤积土体参数对高桩码头桩基受力变形影响规律,可为高桩码头-岸坡相互作用体系的相关工程设计及可靠性评价提供理论参考作用。

本文引用格式

熊琦, 崔春义, 赵敏, 刘海龙, 尤再进, 季则舟, 李军 . 淤积荷载作用下高桩码头桩基受力变形特性灵敏度分析[J]. 大连海事大学学报, 2025 , 51(1) : 141 -150 . DOI: 10.16411/j.cnki.issn1006-7736.2025.01.015

Abstract

To investigate the influence of sediment soil parameters to pile foundations of piled wharf to force deformation, a numerical computational model of the interaction system of bank slope and piled wharf is established, Firstly, extensive fiducial error is used to identify the key siltation stages during bank slope siltation process. Furthermore, the Sobol’ and TGP global sensitivity analysis method are also employed to analyze the sensitivity of the sediment soil parameters to the force deformation of pile foundations. On this basis, a normalized sensitivity index (SVI) method is utilized to determinate the importance of cohesion, friction angle, Young’s modulus, and Poisson's ratio in influencing the force deformation of the pile foundations. The computational results show that the Young’s modulus is the primary driving factor for affecting the force deformation of pile foundations. And the sensitivity of the pile foundation to horizontal displacement at the mudline is not influenced by sediment thickness, with the importance ranking as follows: Young’s modulus, cohesion, Poisson's ratio, and friction angle. The quantitative findings of this study contribute to a deeper understanding of the influence of sediment soil parameters on the force deformation of pile foundations during bank slope siltation process, which can provide valuable theoretical references for the engineering design and reliability assessment of the interaction system of bank slope and piled wharf. 

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