砂土地基中吸力筒基础内土塞高度研究  

Soil plug height within suction bucket foundation in sand foundation

作　　者：黄山田 王震 董振强 申志超 邵亮亮 HUANG Shantian;WANG Zhen;DONG Zhenqiang;SHEN Zhichao;SHAO Liangliang(Offshore Oil Engineering Co.,Ltd.,Tianjin 300461,China;School of Marine Science and Engineering,South China University of Technology,Guangzhou,Guangdong 511442,China)

机构地区：[1]海洋石油工程股份有限公司,天津300461 [2]华南理工大学海洋科学与工程学院,广东广州511442

出　　处：《中国海上油气》2025年第2期259-269,共11页China Offshore Oil and Gas

基　　金：广东省基础与应用基础研究基金“海上浮式风电共享式系泊锚固系统设计优化研究(编号:2023A1515240026)”;中央高校基本科研业务费项目“复杂土质条件下基于CPT的海洋浅基础承载力研究(编号:2023ZYGXZR059)”;海洋石油工程股份有限公司科技创新研发项目“多功能圆筒型防护装置技术应用研究(编号:E-0822P006)”部分研究成果。

摘　　要：吸力筒基础在海洋工程领域应用广泛,其在沉贯过程中易出现土塞现象,影响基础的顺利安装。关于吸力筒基础在沉贯过程中土塞高度的研究,目前主要集中在黏土地基,针对砂土地基的研究相对匮乏。本研究通过有限元软件ABAQUS中VUMAT子程序,将亚塑性本构嵌入耦合欧拉-拉格朗日数值模型,研究砂土地基中吸力筒沉贯过程的土塞隆起效应。首先,将本文数值模拟结果与现有模型试验及数值模拟结果对比,验证了本文方法的可靠性;进一步开展参数分析,探究吸力筒径厚比、砂土相对密度和筒-土界面摩擦系数对筒内最大土塞高度的影响;并基于数值计算,提出了砂土地基中吸力筒沉贯过程中筒内最大土塞高度的预测公式。结果表明:吸力筒径厚比和砂土相对密度是筒内最大土塞高度的主要影响因素,筒-土界面摩擦系数的影响程度较小。研究成果为吸力筒的设计和安装提供了理论依据。Suction bucket foundations are widely used in marine engineering,and soil plug phenomena are prone to occur during their penetration,which affect their installation.Current studies on soil plug height during the penetration of suction bucket foundations primarily focus on clay foundations,while studies related to sand foundations remain relatively limited.In this study,the hypoplastic constitutive model was embedded within the coupled Eulerian-Lagrangian numerical model by using the VUMAT subroutine of the ABAQUS finite element software to investigate the soil plug heave effect during the penetration process of suction buckets in sand foundations.Firstly,the reliability of the method in this paper was validated by comparing the simulation results with existing experimental and numerical simulation results.Subsequently,parametric analyses were conducted to explore the effects of the diameter-thickness ratio of the suction bucket,relative sand density,and friction coefficient at the bucket-soil interface on the maximum soil plug height within the suction bucket.Based on numerical results,the paper proposed a predictive formula for the maximum soil plug height during suction bucket penetration in sand foundations.The results indicate that the diameter-thickness ratio of the suction bucket and the relative sand density are the main influencing factors for the maximum soil plug height within the suction bucket,while the friction coefficient at the bucket-soil interface less influences the soil plug height.The findings provide a theoretical basis for the design and installation of suction buckets.

关 键 词：吸力筒基础 土塞高度 砂土 数值模拟 亚塑性模型 径厚比 砂土相对密度 筒-土界面摩擦系数 

分 类 号：TE42[石油与天然气工程—油气田开发工程] P75[天文地球—海洋科学]