Effect of overlying soft soil layer on bearing capacity of four bucket foundation for offshore wind turbines

被引：0

作者：

Ding H. ^{[1
,2
,3
]}

Zhang C. ^{[3
]}

Zhang P. ^{[1
,3
]}

Zhai H. ^{[3
]}

机构：

[1] State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin

[2] Key Laboratory of Coast Civil Structure Safety of Ministry of Education, Tianjin University, Tianjin

[3] School of Civil Engineering, Tianjin University, Tianjin

来源：

Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2020年 / 41卷 / 01期

关键词：

Bearing capacity; Failure characteristics; Finite element method(FEM); Offshore marine wind turbine; Overlying soft soil layer; Rotation center; Soil pressure; Wide-shallow four bucket foundation;

D O I：

10.11990/jheu.201808055

中图分类号：

学科分类号：

摘要：

To investigate the effect of overlying soft soil layer on the bearing capacity of the wide-shallow four bucket foundation for offshore wind turbines, a model was established by ABAQUS FEM software. The bearing capacity, failure characteristics under unidirectional load and the lateral earth pressure under vertical load, horizontal load, and bending moment were studied in sandy soil with different thickness of soft soil. The results show that the bearing capacity of the wide-shallow four bucket foundation decreases linearly with the increase of the overlying soft soil thickness under unidirectional load. Affected by the soft soil layer, the plastic collapse area of the soil decreases and moves down, but the center of rotation is unchanged; the soil pressure at the top of the bucket is more uniform under the vertical load; the lateral passive earth pressure under horizontal load and bending moment is important to the bearing capacity, but it decreases with the increase of the thickness of the overlying soft soil layer. © 2020, Editorial Department of Journal of HEU. All right reserved.

引用

页码：67 / 75

页数：8

共 16 条

[1] Bye A., Erbrich C., Rognlien B., Et al., Geotechnical design of bucket foundations, Offshore Technology Conference, pp. 869-883, (1995)
[2] Hung L.C., Kim S.R., Evaluation of vertical and horizontal bearing capacities of bucket foundations in clay, Ocean Engineering, 52, pp. 75-82, (2012)
[3] Ding H., Zhu Y., Zhang P., Et al., Research on the heave motion characteristics of a towed large air floating caisson, Journal of Harbin Engineering University, 37, 12, pp. 1665-1670, (2016)
[4] Li D., Zhang Y., Gao Y., Et al., Model tests on penetration of suction anchors in medium-coarse sand, Chinese Journal of Geotechnical Engineering, 34, 12, pp. 2277-2283, (2012)
[5] Koh K.X., Wang D., Hossain M.S., Numerical simulation of caisson installation and dissipation in kaolin clay and calcareous silt, Bulletin of Engineering Geology and the Environment, 77, 3, pp. 953-962, (2018)
[6] Kim S.R., Hung L.C., Oh M., Group effect on bearing capacities of tripod bucket foundations in undrained clay, Ocean Engineering, 79, pp. 1-9, (2014)
[7] Hung L.C., Kim S.R., Evaluation of combined horizontal-moment bearing capacities of tripod bucket foundations in undrained clay, Ocean Engineering, 85, pp. 100-109, (2014)
[8] Tran N.X., Hung L.C., Kim S.R., Evaluation of horizontal and moment bearing capacities of tripod bucket foundations in sand, Ocean engineering, (2017)
[9] Wu K., Xue H., Chen R., Et al., Studies on bearing capacity of composite multi-bucket structure of suctional bucket foundation, Journal of Disaster Prevention and Mitigation Engineering, 28, 4, pp. 484-491, (2008)
[10] Liu S., Wang Z., Luan M., Numerical analysis of bearing capacity behavior of multi-bucket suctional foundation for offshore wind turbine under monotonic loading, The Ocean Engineering, 28, 1, pp. 31-35, (2010)

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