«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:

42卷

期数:

2025年06期

页码:

167-176

栏目:

岩土工程

出版日期:

2025-11-25

文章信息/Info

Title:

Experimental study on force and deformation characteristics of foundation pit under asymmetric load

文章编号:

1673-2049(2025)06-0167-10

作者:

丁小文¹,曾小广¹,林钊睿^2,3,徐长节^2,3,丁海滨^2,3

(1. 江西省交通运输科学研究院有限公司,江西 南昌 330200; 2. 华东交通大学 土木建筑学院,江西 南昌 330013; 3. 华东交通大学 江西省岩土工程基础设施安全与控制重点实验室,江西 南昌 330013)

Author(s):

DING Xiaowen¹, ZENG Xiaoguang¹, LIN Zhaorui^2,3, XU Changjie^2,3, DING Haibing^2,3

(1. Jiangxi Transportation Research Institute Co., Ltd., Nanchang 330200, Jiangxi, China; 2. School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, Jiangxi, China; 3. Jiangxi Key Laboratory of Geotechnical Infrastructure Safety and Control, East China Jiaotong University, Nanchang 330013, Jiangxi, China)

关键词:

非对称荷载;  基坑开挖;  室内模型试验;  支护结构;  土压力;  变形

Keywords:

asymmetric load;  foundation pit excavation;  indoor modelling test;  supporting structure;  earth pressure;  deformation

分类号:

TU94

DOI:

10.19815/j.jace.2024.05083

文献标志码:

A

摘要:

通过1g(g为重力加速度)室内模型试验,以基坑两侧荷载差值为主要参数,研究非对称荷载作用下内撑式深基坑开挖过程中的受力变形情况。结果表明:在非对称荷载作用下,内撑式深基坑呈现两头大、中间小的“鼓肚型”变位模式; 在基坑荷载较小侧荷载为0的情况下,随着基坑两侧非对称荷载差值的增大,荷载较大侧支护结构位移随之增大,同时荷载较小侧位移减小,甚至可能出现“推回位移”; 非对称荷载差值增大会影响支护桩两侧的土压力,荷载较大侧支护桩被动土压力随荷载差值增大呈现出显著的非线性,主动土压力随荷载差值增大而减小,荷载较小侧支护桩被动土压力分布的非线性较弱,主动土压力随荷载差值增大而增大; 在设计中可以通过优化桩长来提高基坑的经济性与安全性; 对于坑外地表沉降,荷载较大侧随荷载增大显著增长,荷载较小侧基本不受荷载差值影响; 研究成果可为类似非对称基坑设计、施工提供参考。

Abstract:

Through the 1g(g is acceleration of gravity)indoor model test, the load difference between two sides of the foundation pit was taken as the main parameter to study the force and deformation of the internal braced deep foundation pit excavation under asymmetric load. The results show that under asymmetric load, the internal braced deep foundation pit presents a “belly-type” dislocation pattern with two large ends and small center. When the foundation pit load is small and the side load is 0, as the asymmetric load difference between the two sides of the pit increases, the displacement of the supporting structure on the side with large load increases, while the displacement of the side with small load decreases, and even “push-back displacement” may occur. The increase of the asymmetric load difference can affect the earth pressure on both sides of the supporting pile. The passive earth pressure on the side of the supporting pile with large load presents a significant nonlinear with the increase of the load difference, the active earth pressure decreases with the increase of the load difference. The passive earth pressure distribution on the side of the supporting pile with small load has a weak nonlinear, and the active earth pressure increases with the increase of the load difference. In the design, the economy and safety of foundation pit can be improved by optimizing the pile length. For the surface settlement outside the pit, the side with larger load increases significantly with the increase of load, and the side with smaller load is basically unaffected by the load difference. The research findings can provide an effective reference basis for similar asymmetric pit design and construction.

参考文献/References:

[1] 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.
[2]刘 波,章定文,席培胜.偏压基坑工程设计、施工与受力变形特性研究进展[J].中国矿业大学学报,2018,47(4):791-804.
LIU Bo, ZHANG Dingwen, XI Peisheng. Review on design, construction, stress and deformation characteristics of asymmetrically loaded deep excavation[J]. Journal of China University of Mining & Technology, 2018, 47(4): 791-804.
[3]石钰锋,阳军生,白 伟,等.紧邻铁路偏压基坑围护结构变形与内力测试分析[J].岩石力学与工程学报,2011,30(4):826-833.
SHI Yufeng, YANG Junsheng, BAI Wei, et al. Analysis of field testing for deformation and internal force of unsymmetrical loaded foundation pit's enclosure structure close to railway[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(4): 826-833.
[4]张学民,石钰锋,张自力,等.列车动载作用下偏压基坑围护结构的动力响应分析[J].振动与冲击,2012,31(20):103-109.
ZHANG Xuemin, SHI Yufeng, ZHANG Zili, et al. Dynamic response of enclosure structure of an unsymmetrical loaded foundation pit under train induced dynamic load[J]. Journal of Vibration and Shock, 2012, 31(20): 103-109.
[5]姚爱军,张新东.不对称荷载对深基坑围护变形的影响[J].岩土力学,2011,32(增2):378-382,388.
YAO Aijun, ZHANG Xindong. Influence of asymmetric load on supporting deformation for deep foundation pit[J]. Rock and Soil Mechanics, 2011, 32(S2): 378-382, 388.
[6]王 鹏.考虑不同偏压作用的地铁深基坑受力与变形规律研究[J].现代隧道技术,2019,56(增2):424-431.
WANG Peng. Analysis of the different bias action affecting the support structure forces and deformations of excavation pit[J]. Modern Tunnelling Technology, 2019, 56(S2): 424-431.
[7]高亿文,李明广,陈锦剑.超载影响下围护结构非对称基坑的受力及变形特性分析[J].上海交通大学学报,2020,54(6):643-651.
GAO Yiwen, LI Mingguang, CHEN Jinjian. Stress and deformation performance of deep excavation with asymmetrical retaining structures in adjacent surcharge[J]. Journal of Shanghai Jiao Tong University, 2020, 54(6): 643-651.
[8]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受力演化过程分析[J].建筑科学与工程学报,2015,32(3):74-80.
HUANG Zhiquan, LI Xiaohui, 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(3): 74-80.
[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(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.
[10]林 刚,徐长节,蔡袁强.不平衡堆载作用下深基坑开挖支护结构性状研究[J].岩土力学,2010,31(8):2592-2598.
LIN Gang, XU Changjie, CAI Yuanqiang. Research on characters of retaining structures for deep foundation pit excavation under unbalanced heaped load[J]. Rock and Soil Mechanics, 2010, 31(8): 2592-2598.
[11]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.
[12]郑 刚,宗 超,曾超峰,等.非对称基坑分步降水开挖引起的围护结构变形性状[J].岩土工程学报,2013,35(增2):550-554.
ZHENG Gang, ZONG Chao, ZENG Chaofeng, et al. Deformation of asymmetric foundation pit caused by staged dewatering and excavation[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(S2): 550-554.
[13]孙志浩,雷菲菲,薛文静,等.非对称荷载下内撑式基坑受力变形分析[J].科学技术与工程,2021,21(24):10222-10228.
SUN Zhihao, LEI Feifei, XUE Wenjing, et al. Stress and deformation analysis of internal bracing foundation pit under asymmetric load[J]. Science Technology and Engineering, 2021, 21(24): 10222-10228.
[14]孙志浩,徐长节,房玲明,等.非对称荷载下内撑式基坑支护结构参数分析及设计优化探讨[J].应用力学学报,2024,41(1):158-168.
SUN Zhihao, XU Changjie, FANG Lingming, et al. Parameter analysis and discussion on design optimization of support structure of internal bracing foundation excavation under asymmetric loads[J]. Chinese Journal of Applied Mechanics, 2024, 41(1): 158-168.
[15]孙志浩,张兴周,葛佳佳,等.不同荷载距离下内撑式不平衡基坑受力变形分析[J].兰州大学学报(自然科学版),2022,58(6):735-743.
SUN Zhihao, ZHANG Xingzhou, GE Jiajia, et al. Stress and deformation analysis of an unbalanced foundation pit with a braced retaining structure under different load distances[J]. Journal of Lanzhou University(Natural Sciences), 2022, 58(6): 735-743.
[16]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.
[17]王顺祥.地中壁在非对称超载深基坑中的应用研究[J].城市轨道交通研究,2023,26(增2):168-172,189.
WANG Shunxiang. Application research of diaphragm walls in asymmetrically overloaded deep foundation pit[J]. Urban Mass Transit, 2023, 26(S2): 168-172, 189.
[18]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.
[19]喻 军,鲁 嘉,龚晓南.考虑围护结构位移的非对称基坑土压力分析[J].岩土工程学报,2012,34(增1):24-27.
YU Jun, LU Jia, GONG Xiaonan. Earth pressure on supporting structures of asymmetric excavations considering their displacement[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(S1): 24-27.
[20]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.
[21]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.
[22]阮 升,金亚兵,徐晶鑫,等.非对称荷载单层对撑基坑计算方法研究[J].岩土力学,2022,43(8):2296-2304.
RUAN Sheng, JIN Yabing, XU Jingxin, et al. A calculation method of single-layer opposite bracing foundation pit under asymmetric load[J]. Rock and Soil Mechanics, 2022, 43(8): 2296-2304.
[23]金亚兵,刘 动,孙 勇.非对称荷载基坑内支撑支护结构设计计算方法[J].地下空间与工程学报,2019,15(6):1811-1818.
JIN Yabing, LIU Dong, SUN Yong. Design and calculation method of inner support structure in deep foundation pit under asymmetric load[J]. Chinese Journal of Underground Space and Engineering, 2019, 15(6): 1811-1818.
[24]马险峰,张海华,朱卫杰,等.软土地区超深基坑变形特性离心模型试验研究[J].岩土工程学报,2009,31(9):1371-1377.
MA Xianfeng, ZHANG Haihua, ZHU Weijie, et al. Centrifuge model tests on deformation of ultra-deep foundation pits in soft ground[J]. Chinese Journal of Geotechnical Engineering, 2009, 31(9): 1371-1377.
[25]HU W D, ZENG Y Q, ZHU X N, et al. Determination of passive earth pressure on a cantilever retaining wall in a narrow foundation pit based on logarithmic spiral sliding surface[J]. International Journal of Geomechanics, 2023, 23(8): 04023126.
[26]OU C Y, HSIEH P G. A simplified method for predicting ground settlement profiles induced by excavation in soft clay[J]. Computers and Geotechnics, 2011, 38(8): 987-997.

相似文献/References:

[1]郭院成,詹景元,杜浩鸣,等.郑州粉土基坑开挖对下卧地铁隧道的影响[J].建筑科学与工程学报,2019,36(05):11.
　GUO Yuan-cheng,ZHAN Jing-yuan,DU Hao-ming,et al.Influence of Excavation of Zhengzhou Silt Foundation Pit on Underlying Subway Tunnel[J].Journal of Architecture and Civil Engineering,2019,36(06):11.
[2]郭院成,张博闻,孟 潮,等.堆土加卸载与基坑开挖叠加对既有隧道变形的影响研究[J].建筑科学与工程学报,2023,40(01):142.[doi:10.19815/j.jace.2021.08010]
　GUO Yuancheng,ZHANG Bowen,MENG Chao,et al.Study on influence of soil loading and unloading and foundation pit excavation superposition on existing tunnel deformation[J].Journal of Architecture and Civil Engineering,2023,40(06):142.[doi:10.19815/j.jace.2021.08010]
[3]仲志武.十字斜交换乘车站基坑优化方案对比[J].建筑科学与工程学报,2023,40(01):150.[doi:10.19815/j.jace.2021.08062]
　ZHONG Zhiwu.Comparison of foundation pit optimization schemes of cross oblique transfer station[J].Journal of Architecture and Civil Engineering,2023,40(06):150.[doi:10.19815/j.jace.2021.08062]

备注/Memo

备注/Memo:

收稿日期:2024-05-23
基金项目:国家自然科学基金项目(52068033); 江西省交通厅科技项目(2021C0006,2022Z0001,2022Z0002); 赣鄱俊才支持计划——主要学科学术和技术带头人培养项目(20232BCJ23069)
作者简介:丁小文(1973-),男,高级工程师, E-mail:2021018081401013@ecjtu.edu.cn。
通信作者:林钊睿(1998-),男,工学博士研究生, E-mail:1006161072@qq.com。

常用功能

更新日期/Last Update: 2025-11-25