Vacuum penetration and ultimate pull-out capacity of low skirted suction caissons

LIU Xiao-ke; LU Qun; LU Shi-wei; LIU Chun-long; GUO Shao-long

doi:10.16285/j.rsm.2016.2865

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Vacuum penetration and ultimate pull-out capacity of low skirted suction caissons

更新时间：2026-06-25

- Vacuum penetration and ultimate pull-out capacity of low skirted suction caissons
- Vol. 39, Issue 6, Pages: 2089-2098(2018)
- 作者机构：
  
  1. 天津城建大学土木工程学院,天津,300384
  2. 中国市政工程华北设计研究总院有限公司,天津,300381
  3. 天津城建大学天津市软土特性与工程环境重点试验室,天津,300384
  4. 中国电建集团华东勘测设计研究院有限公司,浙江,杭州,310014
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2016.2865
  CLC： TU473.1
- Online First：03 July 2018，
  
  Published：2018
- 稿件说明：
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LIU Xiao-ke, LU Qun, LU Shi-wei, et al. Vacuum penetration and ultimate pull-out capacity of low skirted suction caissons[J]. 2018, 39(6): 2089-2098.
DOI：

LIU Xiao-ke, LU Qun, LU Shi-wei, et al. Vacuum penetration and ultimate pull-out capacity of low skirted suction caissons[J]. 2018, 39(6): 2089-2098. DOI： 10.16285/j.rsm.2016.2865.

摘要

为了提高裙式吸力桩的承载力，使其更易于沉贯且能更好地保护主桶周围土体免受洋流刨蚀，提出了一种新型低裙式吸力桩模型，采用双桶负压法沉贯该桩，能有效减小土塞高度。提出的超低位真空预压法能够快速固结土体，缩短试验周期，采用该方法加固的土体，能够较好地模拟强度沿深度增加的地基土。在该土体上采用抽真空法沉贯不同规格的吸力桩模型，对比研究低裙式吸力桩的可贯性，分析其沉贯阻力，结合试验数据拟合出了沉贯阻力公式。最后，通过45°斜拉试验并结合PLAXIS 3D软件对吸力桩承载力展开研究，对比试验与数值模拟结果，分析新型低裙式吸力桩的合理性。

Abstract

A new model of the low skirted suction caisson was proposed to improve its bearing capacity and make it easy to penetrate and protect the soil around the barrel from the ocean current. Penetrating the caisson with a double barrel of vacuum pressure can not only improve the penetration but also effectively reduce the height of soil plug. A new method of ultra-low underneath vacuum preloading was put forward to consolidate soft soil and shorten the period quickly. The soil reinforced by this method can better simulate the foundation soil with increased strength along the depth. The suction caisson models with different specifications by the vacuum method were penetrated into soil

and then the feasibility of the low skirted suction caisson was comparatively studied. The penetration resistance was analysed

and then a corresponding formula was deduced by fitting experimental data. The bearing capacity of the suction caisson was studied by the 45°pullout test combined with the finite element analysis of PLAXIS 3D software. Finally

the rationality of the low skirted suction caisson was verified.

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