|Table of Contents|

Numerical analysis of bearing behavior and settlement characteristics of squeezed branch piles(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2025年04期
Page:
197-206
Research Field:
岩土工程
Publishing date:

Info

Title:
Numerical analysis of bearing behavior and settlement characteristics of squeezed branch piles
Author(s):
XIE Hongli;  WANG Miaomiao;  TIAN Yeqing;  REN Yubo;  ZHOU Zhijun
(School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China)
Keywords:
squeezed branch pile;  load transfer characteristic;  settlement;  side friction resistance;  axial force;  end resistance
PACS:
TU473.1
DOI:
10.19815/j.jace.2023.12031
Abstract:
In order to study the axial force transfer law, side friction distribution characteristics, end resistance evolution mechanism and settlement deformation characteristics of squeezed branch pile, based on the actual engineering, ABAQUS finite element software was used to carry out numerical simulation analysis on multi-branch squeezed branch pile. Considering the influence of actual soil compaction effect and boundary effect on the accuracy of model, the settlement deformation curve of squeezed branch pile in actual engineering was compared with finite element results to verify the applicability of the model. On this basis, a comparative analysis was conducted on the load transfer characteristics and settlement characteristics of traditional cast-in-place piles and squeezed branch piles. The results show that the squeezed branch pile has the characteristics of high bearing capacity and small settlement. Under the same design bearing capacity, the pile lengths of single-plate, double-plate, and triple-plate squeezed branch pile are only 71.4%, 64.3% and 53.6% of the traditional cast-in-place pile length, which has significant pile length optimization characteristics. For the single-plate squeezed branch pile, the settlement deformation curves of different-plate positions are not much different. When multiple plates are set up, the settlement deformation is small when the plate position is set in the middle and lower layers. The side friction resistance is transferred from top to bottom, and the proportion of total load under different vertical loads is 60%-42%, and the side friction resistance is inversely proportional to the end resistance. The support plate bears more than 50% of the load, which is the most important part of the load. The support plate has a reducing effect on the axial force of pile. The deeper the support plate is buried, the more significant the axial force is reduced.

References:

[1] 张金保,韩玉花,王海静,等.挤扩支盘灌注桩承载力影响因素的数值模拟研究[J].公路,2021,66(7):81-87.
ZHANG Jinbao, HAN Yuhua, WANG Haijing, et al. Numerical simulation and research on the factors that affect the bearing capacity of squeezed branch pouring piles[J]. Highway, 2021, 66(7): 81-87.
[2]王建华,刘泓悦,于泽泉.挤扩支盘桩承载性能理论与试验研究[J].广东土木与建筑,2025,32(3):32-36.
WANG Jianhua, LIU Hongyue, YU Zequan. Theoretical and experimental study on the bearing performance of squeezed expansion branch pile[J]. Guangdong Architecture Civil Engineering, 2025,32(3): 32-36.
[3]何青睿. 挤扩支盘桩抗拔承载特性模型试验研究[D].淮南:安徽理工大学,2022.
HE Qingrui. Experimental study on uplift bearing characteristics of squeezed branch disc pile[D]. Huai-nan: Anhui University of Science & Technology, 2022.
[4]CHEN J W, HUI Y X. Optimized design of a squeezed-branch pile group based on an improved particle swarm algorithm[J]. Sustainability, 2023, 15(3): 2060.
[5]马宏伟,杨玉琪,何青睿,等.挤扩支盘桩抗拔承载特性的模型试验研究[J].河南城建学院学报,2023,32(3):1-7.
MA Hongwei, YANG Yuqi, HE Qingrui, et al. Model test study on uplift bearing characteristic of squeezed branch pile[J]. Journal of Henan University of Urban Construction, 2023, 32(3): 1-7.
[6]陈 飞,吴开兴,何 书.挤扩支盘桩承载力性状的现场试验研究[J].岩土工程学报,2013,35(增2):990-993.
CHEN Fei, WU Kaixing, HE Shu. Field tests on load transfer performances of squeezed branch piles[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(S2): 990-993.
[7]LIU L, MA H W, YANG X L, et al. A calculation method of bearing capacity of single squeezed branch pile based on load transfer method[J]. Advances in Materials Science and Engineering, 2022, 2022(1): 9597047.
[8]丘 燊,张国梁,曾昭宇,等.基于正交试验法的挤扩支盘桩加固公路软基参数敏感性[J].科学技术与工程,2024,24(29):12675-12683.
QIU Shen, ZHANG Guoliang, ZENG Zhaoyu, et al. Sensitivity for factors of squeezed branch piles in soft foundation reinforcement of highway based on orthogonal test method[J]. Science Technology and Engineering, 2024, 24(29): 12675-12683.
[9]SU Q Q, XIA H B, WU K M, et al. The effects of branch spacing and number on the uplift bearing capacity of a new squeezed multiple-branch pile: a numerical simulation analysis[J]. Modelling and Simulation in Engineering, 2023, 2023(1): 3758253.
[10]XIONG L, LI G W, ZHOU Y, et al. Experimental and analytical investigation of the bearing capacity of bulbs for squeezed branch piles[J]. International Journal of Geomechanics, 2023, 23(5): 04023045.
[11]张敏霞,崔文杰,徐 平,等.竖向荷载作用下挤扩支盘桩桩周土体位移场变化规律研究[J].岩石力学与工程学报,2017,36(增1):3569-3577.
ZHANG Minxia, CUI Wenjie, XU Ping, et al. Research on soil displacement field around the squeezed branch pile under vertical load[J]. Chinese Journal of Rock Mechanics and Engineering, 2017, 36(S1): 3569-3577.
[12]LI T, XU P, YANG G Q. Investigation into bearing performance of concrete expanded-plates piles: field test and numerical modelling[J]. Engineering Structures, 2022, 271: 114954.
[13]张坤标,汪益敏,陈页开,等.基于承载特性的挤扩支盘桩加固深厚软基作用机理研究[J].岩土工程学报,2024,46(增2):97-102.
ZHANG Kunbiao, WANG Yimin, CHEN Yekai, et al. Mechanism of reinforcement of squeezed branch piles for deep soft foundation based on load bearing capacities[J]. Chinese Journal of Geotechnical Engineering, 2024, 46(S2): 97-102.
[14]ZHOU J J, WANG K H, GONG X N, et al. Bearing capacity and load transfer mechanism of a static drill rooted nodular pile in soft soil areas[J]. Journal of Zhejiang University-Science A(Applied Physics & Engineering), 2013, 14(10): 705-719.
[15]席亚彬.湿陷性黄土地区挤扩支盘桩的承载特性及数值模拟分析[D].兰州:兰州理工大学,2019.
XI Yabin. Bearing behavior and numerical simulation analysis of squeezed branch pile in collapsible loess area[D]. Lanzhou: Lanzhou University of Technology,2019.
[16]张敏霞,崔文杰,徐 平,等.挤扩支盘桩与钻孔灌注桩现场对比试验研究[J].河南理工大学学报(自然科学版),2017,36(2):122-127.
ZHANG Minxia, CUI Wenjie, XU Ping, et al. Comparative test research on squeezed branch piles and bored piles field[J]. Journal of Henan Polytechnic University(Natural Science), 2017, 36(2): 122-127.
[17]MOSHFEGHI S, ESLAMI A. Study on pile ultimate capacity criteria and CPT-based direct methods[J]. International Journal of Geotechnical Engineering, 2018, 12(1): 28-39.
[18]汪益敏,张坤标,丘 燊,等.基于现行规范的挤扩支盘桩设计参数及承载特性对比研究[J].建筑结构,2023,53(增1):2648-2653.
WANG Yimin, ZHANG Kunbiao, QIU Shen, et al. Comparative study on the design parameters and compressive bearing capacity of squeezed branch piles based on current specifications[J]. Building Structure, 2023, 53(S1): 2648-2653.
[19]李 枫,宋焕豹,周云东.挤扩支盘桩的承载特性[J].河海大学学报(自然科学版),2010,38(2):202-205.
LI Feng, SONG Huanbao, ZHOU Yundong. Bearing behaviors of squeezed branch piles[J]. Journal of Hohai University(Natural Sciences), 2010, 38(2): 202-205.
[20]杨建平,朴春德.挤扩支盘桩分布式检测及承载机理研究[J].岩土工程学报,2013,35(增2):1232-1235.
YANG Jianping, PIAO Chunde. Distributed detection and bearing mechanism of squeezed branch piles[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(S2): 1232-1235.
[21]易 浩,张坤标,陈页开,等.软土地区挤扩支盘桩竖向承载特性研究[J].世界桥梁,2021,49(5):79-86.
YI Hao,ZHANG Kunbiao, CHEN Yekai, et al. Study of vertical bearing capacity of squeezed branch pile in soft soil area[J]. World Bridges, 2021, 49(5): 79-86.
[22]吴怡颖.基于荷载传递法的挤扩桩承特性研究[D].淮南:安徽理工大学,2020.
WU Yiying. A calculation theory of bearing capacity of single squeezed branch pile based on load transfer method[D]. Huainan:Anhui University of Science & Technology, 2020.
[23]张贯鑫.错盘布置下挤扩支盘桩竖向承载性状有限元研究[D].开封:河南大学,2018.
ZHANG Guanxin. Finite element analysis on vertical bearing capacity of squeezed branch pile with staggered arrangement plates[D]. Kaifeng: Henan University, 2018.
[24]MA H M, PENG C. Analysis and application of ultimate bearing capacity of squeezed branch pile[J]. Geotechnical and Geological Engineering, 2023, 41(6): 3823-3828.
[25]李连祥,李先军.不同扩径体数量、位置对支盘桩承载力的影响[J].山东大学学报(工学版),2016,46(5):88-94.
LI Lianxiang, LI Xianjun. Influence of squeezed branch pile bearing capacity on different numbers and positions of enlarged parts[J]. Journal of Shandong University(Engineering Science), 2016, 46(5): 88-94.
[26]ZHANG J, ZHANG Z, ZHANG S R, et al. Numerical simulation of the influence of pile geometry on the heat transfer process of foundation soil in permafrost regions[J]. Case Studies in Thermal Engineering, 2022, 38: 102324.
[27]费 康,彭 劼.ABAQUS岩土工程实例详解[M].北京:人民邮电出版社,2017.
FEI Kang, PENG Jie. Detailed explanation of ABAQUS geotechnical engineering examples[M]. Beijing: Posts & Telecom Press, 2017.
[28]王伊丽,徐良英,李碧青,等.挤扩支盘桩竖向承载力特性和影响因素的数值研究[J].土木工程学报,2015,48(增2):158-162.
WANG Yili, XU Liangying, LI Biqing, et al. Finite element numerical study on the axial bearing behaviors and factors of squeezed branch pile[J]. China Civil Engineering Journal, 2015, 48(S2): 158-162.
[29]卢成原,孟凡丽,吴 坚,等.不同土层对支盘桩荷载传递影响的模型试验研究[J].岩石力学与工程学报,2004,23(20):3547-3551.
LU Chengyuan, MENG Fanli, WU Jian, et al. Testing study on effect of different soil layers on load transfer of model piles with branch plates[J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 23(20): 3547-3551.

Memo

Memo:
-
Last Update: 2025-07-10