纺锤形桩靴基础贯入过程<strong>Eulerian-Lagrangian</strong>耦合有限元法的模拟

郑静; 范庆来; 王忠涛

doi:10.13204/j.gyjz201312019

纺锤形桩靴基础贯入过程Eulerian-Lagrangian耦合有限元法的模拟

doi: 10.13204/j.gyjz201312019

1.
1. 鲁东大学交通学院,山东烟台 264025;
2.
2. 鲁东大学岩土工程重点实验室,山东烟台 264025;
3.
3. 大连理工大学海岸和近海工程国家重点实验室,辽宁大连 116024

基金项目:

国家自然科学基金项目(50909048,51079018);山东省自然科学基金项目(ZR2010EQ036);山东省高等学校科技计划项目(J12LG01)

详细信息

作者简介:
郑静，女，1981年出生，硕士，讲师。电子信箱:dlmuzhengjing@163.com

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出版历程
- 收稿日期: 2013-10-30
- 刊出日期: 2013-12-20

PENETRATION PROCESS SIMULATION OF SPUDCAN FOUNDATIONS BY CEL

1.
1 School of Transportation,Ludong University;
2.
2 Key Laboratory of Geotechnical Engineering,Ludong University;
3.
3 State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology

摘要

摘要: 采用欧拉-拉格朗日耦合(Coupled Eulerian-Lagrangian,CEL)有限元方法对于纺锤形桩靴基础的贯入过程进行数值模拟,揭示均质黏土、均质砂土及上砂下黏层状地基中桩靴基础的贯入机理。通过与已有离心模型试验结果的对比,在一定程度上验证建立的CEL有限元模型的合理性,进一步表明基于圆形浅基础承载力理论的桩靴贯入阻力计算公式在预测深层贯入时误差较大。随后比较系统地探讨上层砂土内摩擦角、下层黏土不排水抗剪强度等土性指标对基础贯入阻力曲线的影响,为层状地基中纺锤形桩靴基础承载力的计算提供一定参考。
- 桩靴基础 /
- 贯入阻力 /
- 变形机理 /
- 大变形分析 /
- 欧拉-拉格朗日耦合法
Abstract: Utilizing CEL (Coupled Eulerian-Lagrangian) finite element method，the penetration process of spudcan foundation was numerically simulated. The penetration mechanism of spudcan foundation into uniform clay，uniform sand and sand overlying clay was respectively explored. Through comparing the finite element predictions with available model centrifuge test results，the rationality of the proposed CEL model was validated，which showed that there existed appreciably large discrepancy in simulating deep penetration using analytical formulations based on bearing capacity theory of circular shallow foundations. The effect on the penetration resistance curve was studied to internal friction angle of upper sand and undrained strength of lower clay. The results could be of reference to design of spudcan foundation in layered soil.
- spudcan foundation /
- penetration resistance /
- deformation mechanism /
- large deformation analyses /
- CEL

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参考文献(13)

Hanna A M,Meyerhof G G.Design Charts for Ultimate BearingCapacity of Foundations on Sand Overlying Soft Clay ［J].Canadian Geotechnical Journal, 1980, 17(3): 300-303.

[2] Shiau J S,Lyamin A V,Sloan S W.Bearing Capacity of a SandLayer on Clay by Finite Element Limit Analysis［J].CanadianGeotechnical Journal, 2003, 40(5): 900-915.

[3] Craig W H,Chua K.Deep Penetration of Spud-Can Foundationson Sand and Clay[J].Geotechnique, 1990, 40(4): 541-556.

[4] Lee K K.Investigation of Potential Spudcan Punch-ThroughFailure on Sand Overlying Clay Soils［D].Perth: University ofWestern Australia, 2009.

[5] Yu L, Liu J, Kong X J, et al.Three-Dimensional LargeDeformation FE Analysis of Square Footings in Two-Layered Clays[J].Journal of Geotechnical and Geoenvironmental Engineering,ASCE, 2011, 137(1): 52-58.

[6] 任宪刚,白勇.精确模拟土壤反力对桩靴性能影响的研究［J].船舶力学, 2012, 16(2): 146-155.

[7] 张浦阳.海上自升式钻井平台插/拔桩机理及新型桩靴静/动承载力研究［D].天津: 天津大学, 2008.

[8] Tho K K,Leung C F,Chow Y K,et al.Eulerian Finite ElementTechnique for Analysis of Jack-Up Spudcan Penetration［J].International Journal of Geomechanics,ASCE,2012,11 (1):64-73.

[9] Qiu G,Henke S.Controlled Installation of Spudcan Foundationson Loose Sand Overlying Weak Clay［J].Marine Structures,2011, 24(4): 528-550.

[10] Dassault Systemes.ABAQUS 6. 11 Analysis User's Manual[M].Waltham,USA: Dassault Systemes,Inc., 2011.

[11] 赵军,张爱霞,段梦兰,等.自升式钻井平台方形桩靴地基极限承载力理论解[C]//第十五届中国海洋(岸)工程学术讨论会论文集.北京: 海洋出版社, 2011: 23-30.

[12] Das B M.Principles of Foundation Engineering［M].Stamford,USA: Cengage Learning, 2010: 568-571.

[13] Das B M.Shallow Foundations: Bearing Capacity and Settlement[M].New York: Taylor Francis Group, 2009: 36-40.

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