针对三筒吸力式导管架基础在粉砂质土、淤泥质土中的承载特性进行一系列的数值研究。选取不同厚度的粉砂质土和淤泥质土组合,利用ABAQUS有限元软件对不同土质组合下基础单向的水平承载能力、破坏特性和吸力筒的临侧土压力进行分析。研究发现：三筒吸力式导管架基础在不同土质组合下的水平承载能力呈规律性的变化,且随粉砂质土厚度的增加而增大。结构承载力在吸力筒侧壁的粉砂质土厚度为3~6 m时表现出最大的增长能力,研究结果可为实际工程中三筒导管架基础设计提供建议和参考。
Abstract
In this paper, a series of numerical studies on the bearing capacity of the tripod jacket foundation in sandy soil and silty clay are conducted. The combination of sandy soil and silty clay with different thicknesses is selected, and the general finite element program ABAQUS is used to analyze the bearing capacity of the foundation, the failure characteristics of the foundation and the soil pressure on the side of the cylinder under the horizontal load with different soil combinations. The calculation results show that with the thickness of the silty soil increasing, the horizontal bearing capacity of the tripod suction jacket foundation is regularly increased. The structural bearing capacity shows the greatest growth when the thickness of the attached silty soil is 3-6 m, which can provide suggestions and references for the site selection of the tripod jacket foundation in the actual project.
关键词
海上风电 /
吸力式筒型基础 /
承载力 /
粉砂质土 /
淤泥质土
Key words
offshore wind power /
suction bucket jacket foundation /
bearing capacity /
silty sand /
silty clay
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] 乐丛欢, 任建宇, 姜明涛, 等. 砂土中四筒导管架风机基础抗弯承载力研究[J]. 海洋工程, 2021, 39(2): 12-19.
LE C H, REN J Y, JIANG M T, et al.Research on flexural bearing capacity of four-tube jacket fan foundation in sandy soil[J]. Ocean engineering, 2021, 39(2): 12-19.
[2] KIM S R, HUNG L C, OH M.Group effect on bearing capacities of tripod bucket foundations in undrained clay[J]. Ocean engineering, 2014, 79: 1-9.
[3] HUNG L C, KIM S R.Evaluation of combined horizontal-moment bearing capacities of tripod bucket foundations in undrained clay[J]. Ocean engineering, 2014, 85: 100-109
[4] VICENT S, KIM S R, HUNG L C.Effects of long-term cyclic horizontal loading on bucket foundations in saturated loose sand[J]. Applied ocean research, 2019, 91: 1-12.
[5] 刘永刚, 丁红岩, 张浦阳. 淤泥质黏土中复合筒型基础水平承载力试验研究[J]. 岩土工程学报, 2016, 38(12): 2315-2321.
LIU Y G, DING H Y, ZHANG P Y.Experimental study on horizontal bearing capacity of composite tubular foundation in silty clay[J]. Chinese journal of geotechnical engineering, 2016, 38(12): 2315-2321.
[6] ZHANG P Y, SHI J C, DING H Y, et al.Design of offshore wind power foundation with multi-bucket[J]. Transactions of Tianjin University, 2016, 22(6): 502-507.
[7] 丁红岩, 张超, 张浦阳, 等. 上覆软土层对海上风电四筒基础承载特性影响[J]. 哈尔滨工程大学学报, 2020, 41(1): 67-75.
DING H Y, ZHANG C, ZHANG P Y, et al.Influence of overlying soft soil layer on bearing characteristics of offshore wind turbine four-tube foundation[J]. Journal of Harbin Engineering University, 2020, 41(1): 67-75.
[8] TRAN N X, HUNG L C, KIM S R.Evaluation of horizontal and moment bearing capacities of tripod bucket foundations in sand[J]. Ocean engineering, 2017, 140: 209-221.
[9] ZHANG P Y, HE S H, LIU Y G, et al.Force transfer characteristics of composite bucket foundation for offshore wind turbines[J]. Journal of renewable and sustainable energy, 2016, 8(1): 55-68.
[10] WANG L Z, WANG H, ZHU B, et al.Comparison of monotonic and cyclic lateral response between monopod and tripod bucket foundations in medium dense sand[J]. Ocean engineering, 2018, 155: 88-105.
[11] WANG X F, ZENG X W, LI J L, et al.A review on recent advancements of substructures for offshore wind turbines[J]. Energy conversion and management, 2018, 158: 103-119.
PDF(2033 KB)
