桶式基础吊力增稳沉放技术研究  

Research on Lifting Force to Increase Air Floating Stability of Bucket Foundation During Sinking

作　　者：苗艳遂 李森 MIAO Yansui;LI Sen(No.2 Engineering Co.,Ltd.of CCCC Third Harbor Engineering Co.,Ltd.,Shanghai 200122,China;CCCC Third Harbor Engineering Co.,Ltd.,Shanghai 200032,China)

机构地区：[1]中交三航局第二工程有限公司,上海200122 [2]中交第三航务工程局有限公司,上海200032

出　　处：《施工技术（中英文）》2024年第13期99-103,共5页Construction Technology

基　　金：中交第三航务工程局有限公司2023年度科技研发项目:基于深水和深层砂桩复合地基的桶式基础稳定机理与沉放关键技术研究(2023⁃03)。

摘　　要：桶式基础可利用有顶无底的结构特点实现气浮定位,当水深大于桶式基础高度后,基础将在浮游状态下淹没,并可能发生失稳倾覆,限制了该类新型基础形式在深水环境中的推广应用。为此,本研究通过理论推导,提出了吊力增稳工艺下,桶式基础下桶淹没后保持稳定下沉的最小所需增稳吊力计算公式。开展室内模型试验,无措施条件下桶式基础模型在淹没后失稳,采用吊力增稳的桶式基础模型淹没后仍保持浮游稳定。试验结果与理论分析结果基本一致,验证了理论分析方法的合理性。桶式基础吊力增稳沉放技术已在实际工程得到验证。The bucket foundation can realize air flotation positioning by using the structural characteristics of having a top but no bottom.When the water depth is greater than the height of the bucket foundation,the foundation will be submerged in a floating state and may be destabilized and capsized,which limits the application of this new type of foundation in deep water environments.Therefore,through theoretical derivation,this paper proposes a formula for calculating the minimum required stabilizing lifting force to maintain stable sinking after the bucket under the bucket foundation is submerged under the lifting force stabilizing process.The indoor model test was carried out.The bucket foundation model was unstable after submergence without measures,however,the bucket foundation model stabilized by lifting force remained stable after submergence.The experimental results are basically consistent with the theoretical analysis results,which verifies the rationality of the theoretical analysis method.The bucket foundation lifting force stabilizing sinking technology has been verified in practical engineering.

关 键 词：桶式基础 码头工程 稳定性 吊力 试验 

分 类 号：TU753[建筑科学—建筑技术科学]