排桩支护结构内力与变形三维有限元数值分析

doi:10.13229/j.cnki.jdxbgxb201602017

吉林大学学报(工学版) ›› 2016, Vol. 46 ›› Issue (2): 445-450.doi: 10.13229/j.cnki.jdxbgxb201602017

排桩支护结构内力与变形三维有限元数值分析

胡玉明^{1, 2}, 黄音³, 古海东⁴

1.四川大学水利水电学院,成都 610065;
2.四川盛唐建设工程有限公司,成都 610042;
3.重庆大学土木工程学院,重庆 400045;
4.浙江交通规划设计院,杭州 310006

收稿日期:2014-07-02 出版日期:2016-02-20 发布日期:2016-02-20
通讯作者: 黄音(1971-),男,副教授,博士.研究方向:预应力混凝土结构,结构检测与加固.E-mail:1450481918@qq.com E-mail:huym8088@sina.com
作者简介:胡玉明(1971-),男,高级工程师,博士研究生.研究方向:土木工程及水电建设.E-mail:huym8088@sina.com
基金资助:
国家自然科学基金项目(51078370); 重庆市科委攻关项目(2011AC4067)

Three-dimensional finite element analysis of internal forces and displacement of scattered row piles

HU Yu-ming^{1, 2}, HUANG Yin³, GU Hai-dong⁴

1.College of Water Resource & Hydropower, Sichuan University, Chengdu 610065,China;
2.Sichuan Suntang Construction Engineering Co., Ltd., Chengdu 610042 ,China;
3.School of Civil Engineering, Chongqing University, Chongqing 400045,China;
4.Zhejiang Institute of Communications Planning,Design & Research,Hangzhou 310006,China

Received:2014-07-02 Online:2016-02-20 Published:2016-02-20

摘要/Abstract

摘要： 针对离心模型试验建立了三维有限元数值模型,通过与试验的比较验证了模型的可靠性,并与规范法中的m法进行了比较分析.结合一个悬臂排桩支护结构实例分析了桩身截面尺寸,桩间距和土体强度参数对桩身内力和变形的影响规律.研究表明:采用m法进行排桩支护结构设计偏于保守,与m法相比三维有限元法计算结果与离心机试验结果更为接近;桩身弯矩和桩顶水平位移随桩间净距的增加和桩身截面宽度的减小近似呈线性增加,随着土体黏聚力和内摩擦角的增加近似呈指数形式增加.

关键词: 排桩支护, 离心模型试验, 三维有限元法

Abstract: A three-dimensional Finite Element Model (FEM) of centrifuge was established first, and the reliability of the model was validated by centrifuge test. Then this method was compared with the current specified m-method. A case study of cantilever row piles was carried out to analyze the impact factors to the internal force and head horizontal displacement of the pile. These impact factors include the cross-section area of the pile, the pile spacing and soil strength. Results show that the design of row pile retaining structure by the m-method is conservative. The three-dimensional FEM method is more consistent with the centrifuge testing results than the m-method. The bending moment and the horizontal displacement of the pile linearly increase as the pile spacing increases and the pile width decreases. They nearly exponentially increase with the cohesion and internal friction angle of the soil.

Key words: row pile protection, centrifuge, three-dimensional FEM

中图分类号:

TU47

胡玉明, 黄音, 古海东. 排桩支护结构内力与变形三维有限元数值分析[J]. 吉林大学学报(工学版), 2016, 46(2): 445-450.

HU Yu-ming, HUANG Yin, GU Hai-dong. Three-dimensional finite element analysis of internal forces and displacement of scattered row piles[J]. 吉林大学学报(工学版), 2016, 46(2): 445-450.

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排桩支护结构内力与变形三维有限元数值分析

Three-dimensional finite element analysis of internal forces and displacement of scattered row piles

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