«上一篇/Previous Article|本期目录/Table of Contents|下一篇/Next Article»

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

卷:

期数:

2026年02期

页码:

196-209

栏目:

岩土工程

出版日期:

2026-03-30

文章信息/Info

Title:

Research on characteristics of new spatial internal support structure system in deep foundation pit under asymmetric excavation

文章编号:

1673-2049(2026)02-0196-14

作者:

张信贵¹,梁承考¹,韦刚²,严利娥¹,韩伟³,田应志⁴,张怀¹

(1. 广西大学 土木建筑工程学院,广西 南宁 530004; 2. 广西建工集团控股有限公司,广西 南宁 530001; 3. 广西大学设计院有限公司,广西 南宁 530007; 4. 广西水利电力勘测设计研究院有限责任公司,广西 南宁 530023)

Author(s):

ZHANG Xingui¹, LIANG Chengkao¹, WEI Gang², YAN Li'e¹, HAN Wei³, TIAN Yingzhi⁴, ZHANG Huai¹

(1. College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, Guangxi, China; 2. Guangxi Construction Engineering Group Holdings Co., Ltd., Nanning 530001, Guangxi, China; 3. Guangxi University Design Institute Co., Ltd., Nanning 530007, Guangxi, China; 4. Guangxi Water Conservancy and Electric Power Survey, Design and Research Institute Co., Ltd., Nanning 530023, Guangxi, China)

关键词:

深基坑;  内支撑;  模型试验;  非对称开挖;  数值模拟;  不动点系数

Keywords:

deep foundation pit;  internal support;  model test;  asymmetric excavation;  numerical simulation;  fixed point coefficient

分类号:

TU470

DOI:

10.19815/j.jace.2024.06060

文献标志码:

A

摘要:

为了解非对称开挖工况下深基坑新型空间钢桁架内支撑结构体系的承载特性,通过开展大型模型试验,并结合MIDAS GTS NX建立三维有限元模型,深入研究了非对称开挖工况下深基坑支护结构的变形、受力变化规律。结果表明:新型空间钢桁架内支撑结构体系对深基坑变形控制作用明显,支撑结构协调性较好,在非对称开挖工况中能有效控制支护结构受力变形; 支撑点周围一定范围内的支护桩会出现“返拱位移”,两侧冠、腰梁弯矩出现“非对称”发展; 在数值计算中,随着挖深差变大,开挖侧支护桩位移增长明显,而非开挖侧支护桩则会出现明显的“推回”位移; 两侧斜支撑轴力值逐渐出现偏差,开挖侧斜支撑轴力影响较大,这与传统水平支撑有所不同,在工程应用中应当引起重视; 上下弦杆支撑不动点系数、端点位移呈现非对称发展,下弦杆刚度折减程度更为显著,对支撑稳定性和强度造成不利影响,应该充分考虑不动点系数变化对基坑支护效果的影响; 研究成果能为新型内支撑结构及其他内支撑形式在非对称开挖下的工程实践提供指导。

Abstract:

In order to understand the bearing characteristics of the new spatial steel truss internal support structure system in deep foundation pit under asymmetric excavation conditions, a large-scale model test was conducted and a three-dimensional finite element model combined with MIDAS GTS NX was established to deeply analyze and study the deformation and stress change law of deep foundation pit support structure under asymmetric excavation conditions. The results show that the new spatial steel truss internal support structure system has an obvious control effect on the deformation of deep foundation pit, and the support structure has good coordination, and can effectively control the stress and deformation of the support structure under asymmetric excavation conditions. The supporting pile will appear “arch displacement” within a certain range of support points, and the bending moments of crown and waist beams on both sides will appear “asymmetric” development. In numerical calculation, as the excavation depth difference increases, the displacement of supporting pile on the excavation side increases significantly, while the supporting pile on the non-excavation side will show obvious “push back” displacement. The axial force value of inclined support on both sides will gradually deviate, and the axial force of inclined support on the excavation side has a greater influence, which is different from traditional horizontal support and should be paid attention to in engineering application. The fixed point coefficient of the upper and lower chord support and its end displacement also show asymmetric development, and the lower chord stiffness is reduced more significantly, which has adverse effects on the stability and strength of support. The influence of the fixed point coefficient change on the supporting effect of the foundation pit should be fully considered. The research results can provide guidance for the engineering practice of new internal support structures and other internal support types under asymmetric excavation.

参考文献/References:

[1] 陈富强,李卓勋,李长江.装配式结构在基坑工程中的应用研究现状及展望[J].广东土木与建筑,2019,26(11):30-36.
CHEN Fuqiang, LI Zhuoxun, LI Changjiang. Application research progress and expectation of precast structure in foundation pit engineering[J]. Guangdong Architecture Civil Engineering, 2019, 26(11): 30-36.
[2]许利东,曹 慧,彭小毅,等.装配式钢支撑在软土地区深基坑应用技术研究[J].施工技术,2020,49(增1):58-60.
XU Lidong, CAO Hui, PENG Xiaoyi, et al. Research on application technology of fabricated steel support in deep foundation excavation in soft soil area[J]. Construction Technology, 2020, 49(S1): 58-60.
[3]孙 超,郭浩天.深基坑支护新技术现状及展望[J].建筑科学与工程学报,2018,35(3):104-117.
SUN Chao, GUO Haotian. Present situation and prospect of new technology for deep foundation pit support[J]. Journal of Architecture and Civil Engineering, 2018, 35(3): 104-117.
[4]陈 龙,胡逸凡,陈永辉,等.桩顶荷载作用下细长能源桩承载特性试验[J].中国公路学报,2025,38(1):83-94.
CHEN Long, HU Yifan, CHEN Yonghui, et al. Study on bearing characteristics of slender energy piles with load on top[J]. China Journal of Highway and Transport, 2025, 38(1): 83-94.
[5]王正振,张振涛,戴国亮,等.基于拟动力法的框架预应力锚杆支护边坡的稳定性计算[J].中国公路学报,2025,38(1):119-128.
WANG Zhengzhen, ZHANG Zhentao, DAI Guoliang, et al. Stability analysis of slope reinforced with a frame-prestressed anchor rod structure using pseudodynamic method[J]. China Journal of Highway and Transport, 2025, 38(1): 119-128.
[6]罗丽娟,马甲宽,胡志平,等.螺纹桩单螺牙式剪切破坏形态理论解析[J].交通运输工程学报,2025,25(3):221-230.
LUO Lijuan, MA Jiakuan, HU Zhiping, et al. Theoretical analysis of screw pile under individual thread shear failure pattern[J]. Journal of Traffic and Transportation Engineering, 2025, 25(3): 221-230.
[7]马义安,雷 赟,汤浩杰,等.考虑土体初始体积含水率空间变异性的边坡降雨入渗模型及其稳定性[J].地球科学与环境学报,2025,47(3):344-355.
MA Yian, LEI Yun, TANG Haojie, et al. Rainfall infiltration model and stability of slopes considering spatial variability of initial volumetric water content in soil[J]. Journal of Earth Sciences and Environment, 2025, 47(3): 344-355.
[8]徐长节,成守泽,蔡袁强,等.非对称开挖条件下基坑变形性状分析[J].岩土力学,2014,35(7):1929-1934.
XU Changjie, CHENG Shouze, CAI Yuanqiang, et al. Deformation characteristic analysis of foundation pit under asymmetric excavation condition[J]. Rock and Soil Mechanics, 2014, 35(7): 1929-1934.
[9]徐长节,殷 铭,胡文韬.非对称开挖基坑支撑式围护结构解析解[J].岩土力学,2017,38(8):2306-2312.
XU Changjie, YIN Ming, HU Wentao. Analytical solutions of calculating length of retaining structures of foundation pit under asymmetric excavation[J]. Rock and Soil Mechanics, 2017, 38(8): 2306-2312.
[10]管大刚,胡志明,郑鹏鹏,等.开挖顺序及内支撑早期刚度对软土基坑稳定性影响规律[J].建筑科学与工程学报,2024,41(2):181-190.
GUAN Dagang, HU Zhiming, ZHENG Pengpeng, et al. Influence laws of excavation sequence and early stiffness of inner support on stability of foundation pit in soft soil[J]. Journal of Architecture and Civil Engineering, 2024, 41(2): 181-190.
[11]GUO P P, GONG X N, WANG Y X. Displacement and force analysis of braced structure of deep excavation considering unsymmetrical surcharge effect[J]. Computers and Geotechnics, 2019, 113: 103102.
[12]杨 琴,方忠强,刘 毅,等.非对称开挖深基坑变形分析[J].武汉理工大学学报(交通科学与工程版),2023,47(1):175-179,184.
YANG Qin, FANG Zhongqiang, LIU Yi, et al. Deformation analysis of asymmetric deep excavation[J]. Journal of Wuhan University of Technology(Transportation Science & Engineering), 2023, 47(1): 175-179, 184.
[13]范晓真,许海明,徐长节,等.非对称开挖砂性土基坑刚性支护结构解析解[J].上海交通大学学报,2020,54(4):397-405.
FAN Xiaozhen, XU Haiming, XU Changjie, et al. Analytical solution for rigid retaining structure under asymmetric excavation in cohesionless soil[J]. Journal of Shanghai Jiao Tong University, 2020, 54(4): 397-405.
[14]孔跃跃,万琪伟,丁海滨,等.非对称开挖双支撑支护结构优化设计研究[J].隧道建设(中英文),2023,43(增1):356-364.
KONG Yueyue, WAN Qiwei, DING Haibin, et al. Optimal design of double-braced supporting structure in asymmetric excavation[J]. Tunnel Construction, 2023, 43(S1): 356-364.
[15]OU X F, ZHANG X M, FU J Y, et al. Cause investigation of large deformation of a deep excavation support system subjected to unsymmetrical surface loading[J]. Engineering Failure Analysis, 2020, 107: 104202.
[16]ZHANG W C, WU N, JIA P J, et al. Study of the mechanical performance of excavation under asymmetrical pressure and reinforcement measures[J]. Arabian Journal of Geosciences, 2021, 14(18): 1834.
[17]XU C J, XU Y L, SUN H L, et al. Characteristics of braced excavation under asymmetrical loads[J]. Mathematical Problems in Engineering, 2013, 2013: 452534.
[18]LIU S H, YANG J S, FU J Y, et al. Performance of a deep excavation irregular supporting structure subjected to asymmetric loading[J]. International Journal of Geomechanics, 2019, 19(7): 05019007.
[19]葛 帆,李泽江,刘家国,等.非对称荷载下基坑内支撑结构受力与变形试验研究[J].地下空间与工程学报,2024,20(1):162-170.
GE Fan, LI Zejiang, LIU Jiaguo, et al. Experimental study on stress and deformation of internal support structure under asymmetric load[J]. Chinese Journal of Underground Space and Engineering, 2024, 20(1): 162-170.
[20]李鹏飞,逯倩倩,葛辰贺,等.基于冗余度的非对称基坑双环梁支护结构抗连续性破坏分析[J].隧道建设(中英文),2023,43(增1):109-120.
LI Pengfei, LU Qianqian, GE Chenhe, et al. Analysis of anti-continuity failure of double-ring beam support structure in asymmetric foundation pit based on redundancy degree[J]. Tunnel Construction, 2023, 43(S1): 109-120.
[21]AKAN R. On the responses of braced diaphragm wall supporting deep excavation subjected to asymmetric surcharge loads[J]. Advances in Civil Engineering, 2023, 2023: 5587275.
[22]WANG R S, et al. Performance of an asymmetric pit-in-pit excavation supported by diaphragm wall and multi uplift piles system in coastal areas[J]. Canadian Geotechnical Journal, 2024, 61(8): 1666-1682.
[23]喻 莹,王忠凯,王翠英.不同工况下地下连续墙内支撑支护结构的土压力[J].安全与环境工程,2024,31(6):57-66.
YU Ying, WANG Zhongkai, WANG Cuiying. Soil pressure of bracing underground continuous wall internal support structure in different working conditions[J]. Safety and Environmental Engineering, 2024, 31(6): 57-66.
[24]曹雪山,陆新宇,顾祎鸣.深基坑内钢支撑轴向压力变化规律研究[J].岩土工程学报,2022,44(11):1988-1997.
CAO Xueshan, LU Xinyu, GU Yiming. Variation of axial force of steel struts in deep excavations[J].Chinese Journal of Geotechnical Engineering, 2022, 44(11): 1988-1997.
[25]乔建刚,彭 瑞,李景文,等.基于修正莫尔库伦的基坑开挖对隧道安全影响研究[J].中国安全生产科学技术,2022,18(2):177-183.
QIAO Jiangang, PENG Rui, LI Jingwen, et al. Research on influence of foundation pit excavation on tunnel safety based on modified Mohr Coulomb[J]. Journal of Safety Science and Technology, 2022, 18(2): 177-183.
[26]何旭升,田发派,付晓茜,等.某圆砾地层异形深基坑支护变形规律及开挖空间效应研究[J].广西大学学报(自然科学版),2022,47(3):598-608.
HE Xusheng, TIAN Fapai, FU Xiaoxi, et al. Study on deformation law and excavation space effect of irregular deep foundation pit in gravel stratum[J]. Journal of Guangxi University(Natural Science Edition), 2022, 47(3): 598-608.
[27]陈 铭,仇雅诗,孙佳政,等.局部荷载作用下地铁基坑地表沉降的数值分析[J].建筑结构,2023,53(增1):2916-2921.
CHEN Ming, QIU Yashi, SUN Jiazheng, et al. Surface settlement analysis of subway foundation pits under local loads at different locations[J]. Building Structure, 2023, 53(S1): 2916-2921.
[28]唐海亮.基于修正莫尔库伦模型的基坑开挖变形及受力分析[D].昆明:云南大学,2017.
TANG Hailiang. Deformation and stress analysis of foundation pit excavation based on modified Mohr-Coulomb model[D]. Kunming: Yunnan University, 2017.
[29]仉文岗,严玉苗,袁运涛,等.基坑扩底承载式斜撑支护变形数值模拟研究[J].土木与环境工程学报(中英文),2025,47(4):19-27.
ZHANG Wengang, YAN Yumiao, YUAN Yuntao, et al. Numerical study on deformation of pit tilted strut of concrete-filled steel tube with belled bearing base[J]. Journal of Civil and Environmental Engineering, 2025, 47(4): 19-27.
[30]陈方岩,刘 勇,刘 燕,等.基坑空间效应下盾构工作井环框梁架设对基坑围护结构变形的影响[J].济南大学学报(自然科学版),2025,39(1):71-77.
CHEN Fangyan, LIU Yong, LIU Yan, et al. Influences of shield working shaft ring frame beam erection on structural deformation of foundation pit building envelopes under spatial effect of foundation pits[J]. Journal of University of Jinan(Science and Technology), 2025, 39(1): 71-77.
[31]范晓真.非对称开挖内撑式支护受力变形机理及变形控制设计理论[D].杭州:浙江大学,2021.
FAN Xiaozhen. Stress-deformation mechanism and deformation-controlled design theory of braced retaining structure under asymmetrical excavation[D]. Hangzhou: Zhejiang University, 2021.
[32]王飞阳.内撑式非对称基坑支护体系性状分析[D].广州:华南理工大学,2016.
WANG Feiyang. Analysis of inner-brace supporting system of asymmetric foundation pit[D]. Guangzhou: South China University of Technology, 2016.

相似文献/References:

[1]黄志全,李小慧,孙 怡,等.复合支护下深基坑的变形破坏和支护结构[J].建筑科学与工程学报,2015,32(03):74.
　HUANG Zhi-quan,LI Xiao-hui,SUN Yi,et al.Analysis of Deformation Failure and Supporting Structure Force Evolution of Deep Foundation Pit Under Compound Supporting[J].Journal of Architecture and Civil Engineering,2015,32(02):74.
[2]周 勇,张康康.软弱夹层对深基坑水平位移影响的数值模拟分析[J].建筑科学与工程学报,2017,34(03):9.
　ZHOU Yong,ZHANG Kang-kang.Numerical Simulation Analysis of Influence of Soft Interlayer on Horizontal Displacement of Deep Foundation Pit[J].Journal of Architecture and Civil Engineering,2017,34(02):9.
[3]孙 超,郭浩天.深基坑支护新技术现状及展望[J].建筑科学与工程学报,2018,35(03):104.
　SUN Chao,GUO Hao-tian.Present Situation and Prospect of New Technology for Deep Foundation Pit Support[J].Journal of Architecture and Civil Engineering,2018,35(02):104.
[4]李 博,王贵和,吕高峰,等.深基坑水下开挖变形特性及坑底分仓优化[J].建筑科学与工程学报,2019,36(06):95.
　LI Bo,WANG Gui-he,LYU Gao-feng,et al.Deformation Characteristics of Underwater Excavation of Deep Foundation Pit and Optimization of Sub-warehouse at Foundation Pit Bottom[J].Journal of Architecture and Civil Engineering,2019,36(02):95.
[5]申 翃,徐文博,董志伟,等.深基坑剪力键支护模型优化研究[J].建筑科学与工程学报,2020,37(05):193.[doi:10.19815/j.jace.2019.10058]
　SHEN Hong,XU Wen-bo,DONG Zhi-wei,et al.Optimization Research on Deep Foundation Pit Shear Bond Supporting Model[J].Journal of Architecture and Civil Engineering,2020,37(02):193.[doi:10.19815/j.jace.2019.10058]
[6]颜 超,孙廉威,程子聪.深基坑开挖与周边既有建筑物改造相互影响研究[J].建筑科学与工程学报,2021,38(06):80.[doi:10.19815/j.jace.2021.08060]
　YAN Chao,SUN Lian-wei,CHENG Zi-cong.Study on Interaction Between Deep Foundation Pit Excavation and Reconstruction of Surrounding Existing Buildings[J].Journal of Architecture and Civil Engineering,2021,38(02):80.[doi:10.19815/j.jace.2021.08060]
[7]康亚乐.南宁某地铁隧道风井围护结构设计优化与评价[J].建筑科学与工程学报,2021,38(06):197.[doi:10.19815/j.jace.2021.08043]
　KANG Ya-le.Design Optimization and Evaluation of Air Shaft Enclosure Structure of a Subway Tunnel in Nanning[J].Journal of Architecture and Civil Engineering,2021,38(02):197.[doi:10.19815/j.jace.2021.08043]
[8]邓 彬,张 磊,郑鹏鹏,等.深基坑开挖与内支撑调节对邻近沉井影响规律试验研究[J].建筑科学与工程学报,2023,40(05):174.[doi:10.19815/j.jace.2022.01034]
　DENG Bin,ZHANG Lei,ZHENG Pengpeng,et al.Experimental study on influence of deep foundation pit excavation and inner support adjustment on adjacent open caisson[J].Journal of Architecture and Civil Engineering,2023,40(02):174.[doi:10.19815/j.jace.2022.01034]
[9]管大刚,胡志明,郑鹏鹏,等.开挖顺序及内支撑早期刚度对软土基坑稳定性影响规律[J].建筑科学与工程学报,2024,41(02):181.[doi:10.19815/j.jace.2022.03084]
　GUAN Dagang,HU Zhiming,ZHENG Pengpeng,et al.Influence laws of excavation sequence and early stiffness of inner support on stability of foundation pit in soft soil[J].Journal of Architecture and Civil Engineering,2024,41(02):181.[doi:10.19815/j.jace.2022.03084]
[10]吴 波,夏 倩,刘 聪,等.复杂环境下地铁深基坑变形可靠度分析[J].建筑科学与工程学报,2024,41(05):173.[doi:10.19815/j.jace.2022.09107]
　WU Bo,XIA Qian,LIU Cong,et al.Deformation reliability analysis of subway deep foundation pit under complex environment[J].Journal of Architecture and Civil Engineering,2024,41(02):173.[doi:10.19815/j.jace.2022.09107]

备注/Memo

备注/Memo:

收稿日期:2024-06-21
基金项目:广西重点研发计划项目(桂科AB22035011); 广西科技重大专项项目(桂科AA23073005); 广西高校中青年教师科研基础能力提升项目(2022KY1162)
作者简介:张信贵(1965-),男,工学博士,教授,博士生导师,E-mail:124700708@qq.com。
通信作者:严利娥(1979-),女,工学博士,讲师,E-mail:30781844@qq.com。
Author resume: ZHANG Xinggui(1965-), male, PhD, professor, E-mail: 124700708@qq.com; YAN Li'e(1979-), female, PhD, lecturer, E-mail: 30781844@qq.com.

常用功能

更新日期/Last Update: 2026-04-01