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[1]魏成国,王汉文,刘文涛,等.大型LNG储罐群桩水平承载力确定方法[J].油气储运,2024,43(08):1-13.
　WEI Chengguo,WANG Hanwen,LIU Wentao,et al.Method for determining horizontal bearing capacity of large LNG storage tank group piles[J].Oil & Gas Storage and Transportation,2024,43(08):1-13.

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大型LNG储罐群桩水平承载力确定方法

《油气储运》[ISSN:1000-8241/CN:13-1093/TE] 卷: 43 期数: 2024年08期页码: 1-13 栏目: 出版日期: 2024-08-25

Title:: Method for determining horizontal bearing capacity of large LNG storage tank group piles

作者:: 魏成国; 王汉文; 刘文涛; 崔炜; 詹旺宇; 中国石油天然气管道工程有限公司

Author(s):: WEI Chengguo; WANG Hanwen; LIU Wentao; CUIWei; ZHANWangyu; China Petroleum Pipeline Engineering Corporation

关键词:: LNG; 储罐; 群桩承台; 数值模拟; 受力分析

Keywords:: LNG; storage tank; group pile caps; numerical simulation; force analysis

分类号:: TE42

文献标志码:: A

摘要:: 【目的】对于大型LNG储罐的群桩基础而言，在OBE（50年超越概率10%）、SSE（50年超越概率2%）两种地震工况下承受的水平力较大，桩水平承载力验算尤为关键。规范经验公式在验算桩水平承载力中存在未考虑群桩中不同位置处桩间土相互影响叠加效应，计算结果偏保守，桩基投资浪费较大的问题。【方法】为此，基于岩土分析软件PLAXIS 3D，结合已有现场试桩数据验证土层参数取值的准确性，并对20×104 m3大型LNG储罐高桩承台基础进行不同地震荷载作用下的数值模拟计算，得到不同工况下群桩的水平力分布特点。【结果】受力方向前排基桩的水平力值均大于中心基桩，且随水平荷载增大，两者比值呈下降趋势。传统规范设计方法未考虑群桩中不同位置处桩间土相互叠加影响效应，结果偏保守，将造成较大投资浪费。在此基础上，提出一种基于单桩水平承载力试验的LNG储罐群桩水平承载力的确定方法，并与传统规范设计方法进行对比。【结论】该方法在考虑桩根数、桩间距、桩径、桩顶约束方式的同时，通过选用合理的土体本构模型与土层参数，可考虑实际桩间土相互影响，在保证群桩具有足够水平承载力的前提下显著降低设计中的保守度，对提高LNG储罐高桩承台群桩基础设计的经济性具有借鉴作用。

Abstract:: For large LNG storage tanks, under the two seismic conditions of OBE (50 year exceedance probability of 10%) and SSE (50 year exceedance probability of 2%), the horizontal force borne by the group pile foundation is relatively large, and the calculation of pile horizontal bearing capacity is particularly crucial. Engineering designers generally calculate the horizontal bearing capacity of piles based on standardized empirical formulas. The same value is used at different positions of the group pile foundation, without considering the superposition effect of soil interaction between piles at different positions in the group pile. When the number of piles is small, the difference in force on piles at different positions is not significant. It is reasonable to calculate according to the standard method. However, for LNG storage tank group pile foundations with hundreds of foundation piles, the difference in force on piles at different positions is significant. If calculated according to existing standards, the calculation results are conservative, resulting in significant waste of pile foundation investment. At present, there are many studies on the pile group foundation under horizontal force, and the number of piles studied is relatively small and low, which is a rectangular foundation with low pile caps. However, there are many piles for LNG tank foundations, and most of them are circular foundations with high pile caps. Existing research results cannot provide effective guidance for the design of pile group foundations for large LNG tanks. Therefore, this article is based on the geotechnical analysis software PLAXIS 3D, combined with existing on-site pile test data to verify the accuracy of soil layer parameter values. Numerical simulation calculations were conducted on the high pile foundation of a 200000 m3 large LNG storage tank under different seismic conditions, and the horizontal force distribution characteristics of pile groups under different working conditions were obtained. A method for determining the horizontal bearing capacity of LNG storage tank pile groups based on single pile horizontal bearing capacity testing was proposed, and compared with conventional standard design methods. This has a very important reference value for more economical and reasonable design of LNG storage tank high pile foundation groups.

参考文献/References:

[1] 林琳.我国石油天然气产业的发展问题与趋势[J].北方经贸，2018（8）：114-117. DOI：10.3969/j.issn.1005-913X.2018.08.047.
LIN L. Development problems and trends of China’s oil and gas industry[J]. Northern Economy and Trade, 2018(8): 114-117.
[2] 周立明，韩征，任继红，李敬功，张道勇，冯志刚，等.我国石油天然气探明储量现状及变化特点[J].中国矿业，2019，28（9）：6-11.
ZHOU L M, HAN Z, REN J H, LI J G, ZHANG D Y, FENG Z G, et al. Current situation and changing characteristics of oil and natural gas proved reserves in China[J]. China Mining Magazine, 2019, 28(9): 6-11.
[3] FILIMONOVA I V, KOMAROVA A V, SHARMA R, NOVIKOV A Y. Transformation of international liquefied natural gas markets: new trade routes[J]. Energy Reports, 2022, 8(S9): 675-682. DOI: 10.1016/J.EGYR.2022.07.069.
[4] 黄浩凯.2021年全球液化天然气市场特点及发展趋势[J].国际石油经济，2022，30（4）：79-91. DOI：10.3969/j.issn.1004-7298.2022.04.010.
HUANG H K. Characteristics and development trends of the global LNG market in 2021[J]. International Petroleum Economics, 2022, 30(4): 79-91.
[5] 张廷首.液化天然气的运输方式及其特点分析[J].化工设计通讯，2020，46（3）：238，255. DOI：10.3969/j.issn.1003-6490.2020.03.154.
ZHANG T S. Analysis on the transportation mode and characteristics of LNG[J]. Chemical Engineering Design Communications, 2020, 46(3): 238, 255.
[6] 陈燕.液化天然气储存及应用技术的研究[J].中国资源综合利用，2019，37（3）：148-150. DOI：10.3969/j.issn.1008-9500.2019.03.046.
CHEN Y. Research on LNG storage and application technology[J]. China Resources Comprehensive Utilization, 2019, 37(3): 148-150.
[7] 刘金砺，袁振隆.粉土中钻孔群桩承台-桩-土的相互作用特性和承载力计算[J].岩土工程学报，1987，9（6）：1-15.
LIU J L, YUAN Z L. Cap-pile-soil interaction of bored pile groups in silt and calculation on bearing capacity[J]. Chinese Journal of Geotechnical Engineering, 1987, 9(6): 1-15.
[8] 杜家庆，杜守继，赵丹蕾，唐文勇.竖向荷载下群桩-土-承台相互作用数值分析[J].岩土力学，2013，34（8）：2414-2420. DOI：10.16285/j.rsm.2013.08.054.
DU J Q, DU S J, ZHAO D L, TANG W Y. Numerical analysis of interaction of pile group-soil-raft under vertical load[J]. Rock and Soil Mechanics, 2013, 34(8): 2414-2420.
[9] 卢红前.基于结构体系可靠度的低桩承台基础竖向承载力验算[J].武汉大学学报（工学版），2020，53（S1）：103-110.
LU H Q. The checking calculation of the vertical bearing capacity of the low pile cap foundation based on structural system reliability[J]. Engineering Journal of Wuhan University, 2020, 53(S1): 103-110.
[10] 张健，李雨润，戎贤，师庆晓，贺书云.液化土中斜群桩承台动力响应特性及桩身弯矩分布规律研究[J].地震工程与工程振动，2021，41（3）：235-244. DOI：10.13197/j.eeev.2021.03.235.zhangj.023.
ZHANG J, LI Y R, RONG X, SHI Q X, HE S Y. Dynamic response of pile cap and distribution law of pile bending moment for batter pile group in liquefied soil[J]. Earthquake Engineering and Engineering Vibration, 2021, 41(3): 235-244.
[11] 晁军.不同运行桩数下能量桩群桩承台变形规律研究[J].河南科学，2022，40（6）：956-963. DOI：10.3969/j.issn.1004-3918.2022.06.013.
CHAO J. Pile raft deformation of energy pile group influenced by different quantities of operating piles[J]. Henan Science, 2022, 40(6): 956-963.
[12] 郭亚娟.基于正交试验设计的群桩承台参数分析[J].铁道学报，2012，34（12）：110-114. DOI：10.3969/j.issn.1001-8360.2012.12.017.
GUO Y J. Study on parameters of pile group cap based on orthogonal experimental design[J]. Journal of the China Railway Society, 2012, 34(12): 110-114.
[13] 刘政伟，夏齐勇，尹栋佳，邹黎琼.高桩承台群桩基础水平位移计算与分析[J].中外公路，2019，39（5）：115-117. DOI：10.14048/j.issn.1671-2579.2019.05.023.
LIU Z W, XIA Q Y, YIN D J, ZOU L Q. Calculation and analysis of horizontal displacement of pile groups with high pile caps[J]. Journal of China & Foreign Highway, 2019, 39(5): 115-117.
[14] 冯君，张俊云，朱明，江南.软土地层高承台桥梁群桩基础横向承载特性研究[J].岩土力学，2016，37（S2）：94-104. DOI：10.16285/j.rsm.2016.S2.011.
FENG J, ZHANG J Y, ZHU M, JIANG N. Characteristic study of horizontal bearing capacity and pile group effect coefficient of laterally loaded high pile group foundation for bridge in soft soil[J]. Rock and Soil Mechanics, 2016, 37(S2): 94-104.
[15] 刘杰，张可能.刚性承台下柔性群桩和桩周土荷载传递规律研究[J].土木工程学报，2004，37（7）：82-87. DOI：10.3321/j.issn:1000-131X.2004.07.016.
LIU J, ZHANG K N. Study on transferring foundation of load of grouped flexible piles and soil surrounding pile beneath the rigid cap of pile[J]. China Civil Engineering Journal, 2004, 37(7): 82-87.
[16] 单华峰，王春凌，夏唐代，卢玉华，陶海冰.承台刚度对受荷群桩基础承载性状的影响研究[J].地下空间与工程学报，2020，16（4）：1078-1087.
SHAN H F, WANG C L, XIA T D, LU Y H, TAO H B. Influence of cap stiffness on the bearing behavior of loaded pile group[J]. Chinese Journal of Underground Space and Engineering, 2020, 16(4): 1078-1087.
[17] 张旭恒.低承台桩基础在水平荷载下的群桩效应及动力响应分析[D].北京：北京交通大学，2018.
ZHANG X H. Pile group effect and dynamic response analysis of pile foundation with low pile under horizontal load[D]. Beijing: Beijing Jiaotong University, 2018.
[18] TERAMOTO S, NIIMURA T, AKUTSU T, KIMURA M. Evaluation of ultimate behavior of actual large-scale pile group foundation by in-situ lateral loading tests and numerical analysis[J]. Soils and Foundations, 2018, 58(4): 819-837. DOI: 10.1016/j.sandf.2018.03.011.
[19] 朱向阳.北京地区典型砂卵石地层硬化土本构模型参数试验研究[D].北京：北京交通大学，2021.
ZHU X Y. Experimental study on constitutive model parameters of hardened soil in typical sand and gravel stratum in Beijing area[D]. Beijing: Beijing Jiaotong University, 2021.
[20] 贾鹏，王兰民，杨燕，刘上春.大规模群桩基础水平承载力效应系数计算研究[J].地震工程学报，2020，42（5）：1202-1207. DOI：10.3969/j.issn.1000-0844.2020.05.1202.
JIA P, WANG L M, YANG Y, LIU S C. Effect coefficient calculation of horizontal bearing capacity of large-scale pile group foundation[J]. China Earthquake Engineering Journal, 2020, 42(5): 1202-1207.
[21] JONES K, SUN M, LIN C. Numerical analysis of group effects of a large pile group under lateral loading[J]. Computers and Geotechnics, 2022, 144: 104660. DOI: 10.1016/j.compgeo.2022.104660.

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备注/Memo

作者简介：魏成国，男，1978年生，高级工程师，2006年硕士毕业于西安理工大学岩土工程专业，现主要从事大型LNG储罐结构设计方向的研究工作。地址：河北省廊坊市和平路146号，065000。电话：0316-2075049。Email：923802854@qq.com
通信作者：王汉文，男，1997年生，助理工程师，2022年硕士毕业于北京工业大学建筑与土木工程专业，现主要从事结构设计工作。地址：河北省廊坊市和平路146号，065000。电话：15031793337。Email：Bjut_whw@163.com

更新日期/Last Update: 2024-06-20