软土地基中倾斜桩水平承载特性研究

杜烨; 郭胜忠; 刘永超; 卫超群; 王淞; 陆鸿宇

doi:10.20265/j.cnki.issn.1007-2993.2023-0899

软土地基中倾斜桩水平承载特性研究

doi: 10.20265/j.cnki.issn.1007-2993.2023-0899

杜烨^1,,
郭胜忠¹,
刘永超^{2, 3, ,},
卫超群²,
王淞²,
陆鸿宇³

1.
天津滨海新区轨道交通投资发展有限公司，天津　300459
2.
天津大学建筑工程学院，天津　300072
3.
天津建城基业集团有限公司，天津　300301

详细信息

作者简介:
杜　烨，男，1976 年生，硕士，高级工程师，从事建筑工程、轨道建设工程设计与施工管理。E-mail：chthonic@163.com

通讯作者:
刘永超，男，1970 年生，博士，教授级高级工程师，博士生导师，从事岩土工程设计与施工技术研究与管理。E-mail：chao96521@vip.sina.com

中图分类号: TU473
计量
- 文章访问数: 50
- HTML全文浏览量: 12
- PDF下载量: 14
- 被引次数: 0
出版历程
- 收稿日期: 2023-12-05
- 修回日期: 2024-05-31
- 录用日期: 2024-08-29
- 网络出版日期: 2025-04-07
- 刊出日期: 2025-04-08

Horizontal bearing characteristics of inclined pile in soft soil foundation

1.
Tianjin Binhai New Area Construction & Investment Group Co., Ltd., Tianjin 300459, China
2.
School of Civil Engineering, Tianjin University, Tianjin 300072, China
3.
Tianjin Foundation Engineering Co., Ltd., Tianjin 300301, China

摘要

摘要: 为深入研究倾斜桩在软土地基中的水平承载特性，在天津软土地基开展倾斜桩水平承载试验，并利用ABAQUS数值软件深入分析倾斜桩的受力变形特性。研究结果表明：负斜桩的水平承载性能优于正斜桩，负斜桩的水平承载能力与倾角成正比，正斜桩则相反；水平荷载作用下，倾斜桩桩身位移的主要发生区域为（0～12）d（d为桩径）范围，桩身弯矩和轴力极值点皆位于距桩顶约（6～8）d范围，与正斜桩相比，负斜桩的承载性能受倾角变化的影响更明显；负斜桩侧摩阻力合力方向与正斜桩相反，所产生的正摩阻力利于桩身承载性能发挥。
- 倾斜桩 /
- 水平承载特性 /
- 现场试验 /
- 数值模拟
Abstract: A field horizontal load test of the inclined pile on a soft soil foundation in Tianjin was carried out, and ABAQUS numerical software was used to analyze the deformation characteristics of the inclined pile. The results show that the horizontal bearing capacity of negative inclined piles is better than that of positive inclined piles. The horizontal bearing capacity of negative inclined piles is proportional to the inclination angle, while that of positive inclined piles is the opposite; Under the action of horizontal load, the main displacement area of the inclined pile body is within the range of 0～12 diameter, and the maximum of the bending moment and axial force of the pile body are located in the range of about 6～8 diameter from the pile top. Compared with positive inclined piles, the bearing performance of negative inclined piles is more significantly affected by the change of inclination angle; The direction of the resultant force of the lateral frictional resistance of the negative inclined pile is opposite to that of the positive inclined pile, and the positive frictional resistance generated is conducive to the bearing performance of the pile body.
- inclined pile /
- horizontal bearing characteristics /
- field test /
- numerical modeling

HTML全文

图 1 倾斜桩分类图

下载: 全尺寸图片幻灯片

图 2 试验位置示意图

下载: 全尺寸图片幻灯片

图 3 试验桩分布情况

下载: 全尺寸图片幻灯片

图 4 试验装置

下载: 全尺寸图片幻灯片

图 5 试桩Q-s曲线

下载: 全尺寸图片幻灯片

图 6 120 kN加卸载条件下不同倾角桩体水平位移曲线

下载: 全尺寸图片幻灯片

图 7 模型网格划分

下载: 全尺寸图片幻灯片

图 8 模拟实测拟合情况

下载: 全尺寸图片幻灯片

图 9 倾斜桩受荷桩顶位移对比

下载: 全尺寸图片幻灯片

图 10 倾斜桩受荷桩身位移对比

下载: 全尺寸图片幻灯片

图 11 土体位移场云图

下载: 全尺寸图片幻灯片

图 12 不同荷载桩身弯矩分布

下载: 全尺寸图片幻灯片

图 13 不同倾角桩身弯矩分布

下载: 全尺寸图片幻灯片

图 14 不同荷载桩身轴力分布

下载: 全尺寸图片幻灯片

图 15 不同倾角桩身轴力分布

下载: 全尺寸图片幻灯片

图 16 不同荷载桩身侧摩阻力分布

下载: 全尺寸图片幻灯片

表 1 土体物理力学参数表

土层名称	厚度/m	重度/（kN·m⁻³）	黏聚力c/kPa	内摩擦角φ/（°）	塑性指数	液性指数	压缩系数	压缩模量E_s0.1～0.2/MPa
1素填土	2.45	18	10	8			0.812	2.80
3粉质黏土	1.3	18.4	20.8	13.5	19.1	0.68	0.563	3.58
6-1淤泥质黏土	5.1	17.1	8.3	11.0	19.7	1.38	1.130	2.15
6-2粉质黏土	4.6	18.9	17.4	14.0	11.1	1.21	0.453	4.25
6-3粉质黏土	2.1	18.9	21.8	12.6	14.1	0.82	0.584	3.54
8-1粉质黏土	3.0	20.4	25.9	15.9	10.8	0.67	0.343	4.78
8-2粉土	3.9	20.1	12.9	29.7	5.6	0.60	0.117	14.18

下载: 导出CSV

表 2 模拟土层参数

厚度/m	层底深度/m	土层名称	饱和重度/（kN·m⁻³）	e	φ/（°）	E/MPa	λ	κ	Μ	k/(m·d⁻¹)
1.6	1.6	杂填土	19.4	0.84	15	3.95	0.067	0.0084	0.57	5.00×10⁻¹
3.7	5.3	粉质黏土	19	0.854	19.55	3.95	0.058	0.0072	0.75	1.36×10⁻²
5.5	10.8	粘质粉土	19.5	0.742	27.3	6.10	0.031	0.0039	1.08	7.00×10⁻⁴
8.8	19.6	粉质黏土	19.7	0.755	17.77	5.60	0.055	0.0069	0.68	2.42×10⁻⁴
3.2	22.8	粉细砂	20.2	0.595	30.1	6.10	0.020	0.0025	1.20	2.00
27.2	50	粉质黏土	20.1	0.674	20	6.10	0.047	0.0059	0.77	5.04×10⁻³

下载: 导出CSV

参考文献(14)

[1]	ZHANG L M, MCVAY M C, LAI P W. Centrifuge modelling of laterally loaded single battered piles in sands[J]. Canadian Geotechnical Journal,1999,36(6):1074-1084. doi: 10.1139/t99-072
[2]	JEONG S, KIM D, KWAK K. Failure case study of offshore battered drilled shafts due to seabed rock scouring[C]//Proceedings of the Innovations in Geotechnical Engineering. Orlando: ASCE, 2018.
[3]	郑刚, 王玉萍, 程雪松, 等. 倾斜桩支护结构的工作性能和基坑稳定性[J]. 厦门大学学报(自然科学版),2021,60(1):115-124. (ZHENG G, WANG Y P, CHENG X S, et al. Working performance and stability of excavation retained by inclined retaining structures[J]. Journal of Xiamen University (Natural Science),2021,60(1):115-124. (in Chinese) ZHENG G, WANG Y P, CHENG X S, et al. Working performance and stability of excavation retained by inclined retaining structures[J]. Journal of Xiamen University (Natural Science), 2021, 60（1）: 115-124. (in Chinese)
[4]	郑刚, 王丽. 竖向荷载作用下倾斜桩的荷载传递性状及承载力研究[J]. 岩土工程学报,2008,30(3):323-330. (ZHENG G, WANG L. Load transfer and bearing capacity of inclined pile under vertical load[J]. Chinese Journal of Geotechnical Engineering,2008,30(3):323-330. (in Chinese) doi: 10.3321/j.issn:1000-4548.2008.03.003 ZHENG G, WANG L. Load transfer and bearing capacity of inclined pile under vertical load[J]. Chinese Journal of Geotechnical Engineering, 2008, 30（3）: 323-330. (in Chinese) doi: 10.3321/j.issn:1000-4548.2008.03.003
[5]	HANNA A, NGUYEN T Q. Shaft resistance of single vertical and batter piles driven in sand[J]. Journal of Geotechnical and Geoenvironmental Engineering,2003,129(7):601-607. doi: 10.1061/(ASCE)1090-0241(2003)129:7(601)
[6]	吕凡任. 倾斜荷载作用下斜桩基础工作性状研究[D]. 杭州: 浙江大学, 2004. (LÜ F R. Study on behavior of battered piles under inclined load[D]. Hangzhou: Zhejiang University, 2004. (in Chinese) LÜ F R. Study on behavior of battered piles under inclined load[D]. Hangzhou: Zhejiang University, 2004. (in Chinese)
[7]	KARTHIGEYAN S, RAMAKRISHNA V V G S T, RAJAGOPAL K. Numerical investigation of the effect of vertical load on the lateral response of piles[J]. Journal of Geotechnical and Geoenvironmental Engineering,2007,133(5):512-521. doi: 10.1061/(ASCE)1090-0241(2007)133:5(512)
[8]	江洎洧, 程展林, 潘家军, 等. 水平受荷大尺寸钢管桩离心数值试验研究[J]. 四川大学学报(工程科学版),2016,48(6):16-22. (JIANG J W, CHENG Z L, PAN J J, et al. Numerical centrifugal test study on large-diameter steel pipe pile under horizontal load[J]. Journal of Sichuan University (Engineering Science Edition),2016,48(6):16-22. (in Chinese) JIANG J W, CHENG Z L, PAN J J, et al. Numerical centrifugal test study on large-diameter steel pipe pile under horizontal load[J]. Journal of Sichuan University (Engineering Science Edition), 2016, 48（6）: 16-22. (in Chinese)
[9]	赵明华, 侯运秋, 曹喜仁. 倾斜荷载下基桩的受力研究[J]. 湖南大学学报,1997,24(2):98-102,109. (ZHAO M H, HOU Y Q, CAO X R. Study on the behavior of inclinedly loading piles[J]. Journal of Hunan University,1997,24(2):98-102,109. (in Chinese) ZHAO M H, HOU Y Q, CAO X R. Study on the behavior of inclinedly loading piles[J]. Journal of Hunan University, 1997, 24（2）: 98-102,109. (in Chinese)
[10]	ASHOUR M, ALAAELDIN A, ARAB M G. Laterally loaded battered piles in sandy soils[J]. Journal of Geotechnical and Geoenvironmental Engineering,2020,146(1):06019017. doi: 10.1061/(ASCE)GT.1943-5606.0002186
[11]	赵明华, 邹新军, 邹银生, 等. 倾斜荷载下基桩的改进有限元——有限层分析方法[J]. 工程力学,2004,21(3):129-133. (ZHAO M H, ZOU X J, ZOU Y S, et al. Behavior of piles under inclined loads by the improved finite element-finite layer method[J]. Engineering Mechanics,2004,21(3):129-133. (in Chinese) doi: 10.3969/j.issn.1000-4750.2004.03.024 ZHAO M H, ZOU X J, ZOU Y S, et al. Behavior of piles under inclined loads by the improved finite element-finite layer method[J]. Engineering Mechanics, 2004, 21（3）: 129-133. (in Chinese) doi: 10.3969/j.issn.1000-4750.2004.03.024
[12]	宋永刚, 王金科. 基于数值模拟的斜桩群桩水平和竖向承载特性分析[J]. 兰州理工大学学报,2023,49(5):142-149. (SONG Y G, WANG J K. Analysis of horizontal and vertical bearing characteristics of inclined pile group based on numerical simulation[J]. Journal of Lanzhou University of Technology,2023,49(5):142-149. (in Chinese) doi: 10.3969/j.issn.1673-5196.2023.05.018 SONG Y G, WANG J K. Analysis of horizontal and vertical bearing characteristics of inclined pile group based on numerical simulation[J]. Journal of Lanzhou University of Technology, 2023, 49（5）: 142-149. (in Chinese) doi: 10.3969/j.issn.1673-5196.2023.05.018
[13]	中华人民共和国住房和城乡建设部. 建筑基桩检测技术规范: JGJ 106–2014[S]. 北京: 中国建筑工业出版社, 2014. (Ministry of Housing and Urban-Rural Development of the People’s Republic of China. Technical code for testing of building foundation piles: JGJ 106–2014[S]. Beijing: China Architecture & Building Press, 2014. (in Chinese) Ministry of Housing and Urban-Rural Development of the People’s Republic of China. Technical code for testing of building foundation piles: JGJ 106–2014[S]. Beijing: China Architecture & Building Press, 2014. (in Chinese)
[14]	LÜHRS L, ZANDERSONS B, HUBER N, et al. Plastic Poisson’s ratio of nanoporous metals: a macroscopic signature of tension-compression asymmetry at the nanoscale[J]. Nano Letters,2017,17(10):6258-6266. doi: 10.1021/acs.nanolett.7b02950