吹填淤泥下桶式基础结构土压力及位移分析

doi:10.12066/j.issn.1007-2861.1932

上海大学学报(自然科学版) ›› 2019, Vol. 25 ›› Issue (2): 328-336.doi: 10.12066/j.issn.1007-2861.1932

吹填淤泥下桶式基础结构土压力及位移分析

曹耀中¹, 姚文娟¹(), 程泽坤²

^1. 上海大学土木工程系, 上海200444
^2. 中交第三航务工程勘察设计院有限公司, 上海200032

收稿日期:2017-04-26 出版日期:2019-04-30 发布日期:2019-05-05
基金资助:
国家自然科学基金资助项目(11272200, 11572186)

Analysis of soil pressure and displacement on bucket-based structure under reclamation silt

CAO Yaozhong¹, YAO Wenjuan¹(), CHENG Zekun²

^1. Department of Civil Engineering, Shanghai University, Shanghai 200444, China
^2. CCCC Third Harbor Consultants Co., Ltd., Shanghai 200032, China

Received:2017-04-26 Online:2019-04-30 Published:2019-05-05

摘要/Abstract

摘要：

桶式基础结构是一种能较好地适应水深、浪大、地基软弱等恶劣环境的新型水工结构,其稳定性主要靠桶体结构自重和桶体与土体共同作用抵抗外荷载.土压力的大小及其分布规律是桶式基础驳岸结构计算的首要问题.结合实际工程,建立了桶式基础结构与土体相互作用的三维非线性有限元数值模型,分析了在不同厚度吹填淤泥工况下桶体基础结构上的土压力大小及竖向分布规律,并与基于土的极限平衡条件下的Rankine土压力理论的计算结果进行了比较分析;修正了传统主、被动土压力的计算公式,并对结构在不同厚度的吹填淤泥下的位移进行分析. 结果表明,吹填淤泥下结构土压力与传统土压力公式计算误差为25%,结构整体向吹填淤泥侧倾斜, 最大转角是无吹填淤泥工况的1.24倍,最大沉降值是无吹填淤泥工况的1.16倍.研究为新型桶式基础驳岸结构的稳定性验算提供了参考依据.

关键词: 桶式基础结构, 吹填淤泥, 土压力, 结构位移, 稳定性分析

Abstract:

The bucket-based structure is a new type of hydraulic structure that can better adapt to hostile environments such as deeper water, big waves, and silt soils of low bearing capacity. Its stability depends mainly on the deadweight of barrel structure and interaction of the barrel and earth to resist external loads. Therefore, the level and distribution of soil pressure are primary factors in the calculation of bucket foundation revetment structure. In view of practical engineering, a 3D elasto-plastic finite element model is established to analyze interaction between the structure and the soil. Analyses of the soil pressure and the barrel's vertical and circular distributions are performed with different thickness of reclamation silt. It is compared with the calculation results of the soil's limit equilibrium using the Rankine's soil pressure theory. The traditional formula for active and passive soil pressure is revised, and displacement of the structure with different thickness of reclamation silt is also analyzed. Calculation error in soil pressure between the traditional and the proposed methods is 25%, and the bucket-based structure as a whole tilts toward the land reclamation silt side. The maximum angle is 1.24 times larger than that without reclamation silt, and the maximum subsidence is 1.16 times.

Key words: bucket-based structure, reclamation silt, soil pressure, structure displacement, stability analysis

中图分类号:

U655.54

曹耀中, 姚文娟, 程泽坤. 吹填淤泥下桶式基础结构土压力及位移分析[J]. 上海大学学报(自然科学版), 2019, 25(2): 328-336.

CAO Yaozhong, YAO Wenjuan, CHENG Zekun. Analysis of soil pressure and displacement on bucket-based structure under reclamation silt[J]. Journal of Shanghai University（Natural Science Edition）, 2019, 25(2): 328-336.

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参考文献 16

[1]	Bye A, Erbrich C, Rognlien B, et al. Geotechnical design of bucket foundations [C]// 27th Offshore Technology Conference. 1995: 869-883.
[2]	Rusas P, Baerheim M, Giske S R, et al. Design,operation, planning and experience from the marine operations for the Europipe jacket with bucket foundations [C]// 27th Offshore Technology Conference. 1995: 885-895.
[3]	Baerheim M, Hoberg L, Tjelta T I, et al. Development and structural design of the bucket foundations for the Europipe jacket [C]// 27th Offshore Technology Conference. 1995: 859-867.
[4]	Zhang S H, Zheng Q A, Liu X N . Finite element analysis of suction penetration seepage field of bucket foundation platform with application to offshore oilfield development[J]. Ocean Engineering, 2004,31(11):1591-1599. doi: 10.1016/j.oceaneng.2004.03.001
[5]	WANG Y Z.LU X, WANG S , et al. The response of bucket foundation under horizontal dynamic loading[J]. Ocean Engineering, 2006,33(7):964-973. doi: 10.1016/j.oceaneng.2005.07.005
[6]	蔡正银, 杨立功, 关云飞 , 等. 新型桶式基础防波堤单桶桶壁土压力数值分析[J]. 水利水运工程学报, 2016,16(5):39-46.
[7]	杨会东, 杨立功 . 沉入式新型桶式防波堤抗倾滑移定性计算[J]. 水运工程, 2016,26(4):40-44.
[8]	丁文强, 张东明, 黄宏伟 , 等. 新型桶式驳岸基础结构施工及运营期数值模拟分析研究[J]. 水利学报, 2015,46(S1):343-348.
[9]	王元战, 肖忠, 李元音 , 等. 筒型基础防波堤土压力性状的有限元分析[J]. 岩土工程学报, 2009,31(4):622-627.
[10]	王广德, 李颖, 张凤珍 , 等. 沉入粘土中的大圆筒筒内外土压力分布规律及计算方法[J]. 水道港口, 2002,23(1):16-21.
[11]	聂琴, 魏斌, 李武 . 软土地基上桶式驳岸稳定性离心模型试验研究[J]. 中国港湾建设, 2016,36(1):37-41.
[12]	蔡正银, 徐光明, 顾行文 , 等. 波浪荷载作用下箱筒型基础防波堤性状试验研究[J].中国港湾建设, 2010(S1):90-94.
[13]	王元战, 龚薇, 及春宁 , 等. 基于粘性流模型的筒型基础防波堤波浪力数值分析[J]. 海洋工程, 2008,26(3):38-43.
[14]	文靖斐, 徐少鲲, 别社安 . 箱筒型基础承载力研究[J].水运工程, 2011(6):136-142.
[15]	American Petroleum Institute . Recommended practice for planning,designing, and constructing fixed offshore platforms[R].API Recommended Practice 2A-WSD, 1989.
[16]	王元战, 肖忠, 迟丽华 , 等. 筒型基础防波堤稳定性简化计算方法[J]. 岩土力学, 2009,30(5):1367-1372.

吹填淤泥下桶式基础结构土压力及位移分析

Analysis of soil pressure and displacement on bucket-based structure under reclamation silt

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