|本期目录/Table of Contents|

[1]杨 涛,童立元,李 丹.基坑开挖卸荷引起的公路桥梁桩基变形受力响应[J].建筑科学与工程学报,2020,37(05):214-215.[doi:10.19815/j.jace.2019.10007]
　YANG Tao,TONG Li-yuan,LI Dan.Stress Response of Pile Foundation Deformation of Highway Bridge Caused by Unloading of Pit Excavation[J].Journal of Architecture and Civil Engineering,2020,37(05):214-215.[doi:10.19815/j.jace.2019.10007]
点击复制

基坑开挖卸荷引起的公路桥梁桩基变形受力响应(PDF)
分享到：

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

卷:
37卷
期数:
2020年05期
页码:
214-215
栏目:
出版日期:
2020-09-30

文章信息/Info

Title:
Stress Response of Pile Foundation Deformation of Highway Bridge Caused by Unloading of Pit Excavation
文章编号:
1673-2049(2020)05-0214-09
作者:
杨 涛1,童立元1,李 丹2
1. 东南大学 交通学院,江苏 南京 210096; 2. 南京市公共工程建设中心,江苏 南京 210019
Author(s):
YANG Tao1, TONG Li-yuan1, LI Dan2
1. School of Transportation, Southeast University, Nanjing 210096, Jiangsu, China; 2. Nanjing Urban Public Project Construction Center, Nanjing 210019, Jiangsu, China
关键词:
基坑开挖;  水平附加应力;  有限差分法;  两阶段分析法
Keywords:
excavation of foundation pit;  horizontal additional stress;  finite difference method;  two-stage analysis method
分类号:
TU473
DOI:
10.19815/j.jace.2019.10007
文献标志码:
A
摘要:
采用两阶段分析法分析基坑开挖卸荷作用下公路桥梁的受力变形规律,首先基于明德林解析解,利用复合辛普森公式进行数值积分求解得出基坑侧壁卸荷与坑底卸荷同时作用下土体内桩体位置处的水平附加应力; 其次采用Kerr三参数地基模型建立公路桥梁桩基的挠曲微分方程,结合水平附加应力,利用有限差分数值计算方法得到桩基挠曲微分方程的数学解析矩阵表达式。利用所得计算公式对公路桥梁桩基附近有基坑开挖的工况进行计算,并通过与数值模拟计算结果的对比验证所提计算方法的有效性; 最后针对桩基轴向荷载大小、基坑与桩基距离及基坑三维尺寸进行了影响因素分析。结果表明:桩基轴向荷载的变化对桩基水平位移及桩身弯矩影响不明显; 随着桩基与基坑距离的加大,桩基水平位移及最大弯矩逐渐减小,并且在较大距离范围内桩基水平位移及弯矩变化愈发平缓; 开挖深度对桩基水平位移及弯矩的影响远大于开挖长度和开挖宽度,基坑开挖宽度对桩基的影响最小。
Abstract:
The two-stage analysis method was used to analyze the stress and deformation law of highway bridge pile foundation under unloading of foundation pit excavation. The first stage of the two-stage method was based on the Mindlin solution. Using the composite Simpson formula to solve the numerical integration, the horizontal additional stress at the pile position in the soil under the simultaneous action of the side wall unloading and the bottom unloading of the foundation pit was obtained. In the second stage, Kerr three parameter foundation model was used to establish the deflection differential equation of highway bridge pile foundation. Combined with the horizontal additional stress, the mathematical analytic matrix expression of the differential equation of pile deflection was obtained by using the finite difference numerical calculation method. The calculation formula was used to calculate the excavation condition of foundation pit near the pile foundation of highway bridge, and the validity of the calculation method was verified by comparing with the numerical simulation results. The influence factors of axial load of pile foundation, distance between foundation pit and pile foundation and three-dimensional dimension of foundation pit were analyzed. The results show that the change of axial load of pile foundation has no obvious effect on the horizontal displacement and bending moment of pile body. With the increase of the distance between the pile foundation and the foundation pit, the horizontal displacement and the maximum bending moment of the pile foundation decrease gradually, and the change of the horizontal displacement and bending moment of the pile foundation becomes more and more gentle in a large range. The influence of excavation depth on horizontal displacement and bending moment of pile foundation is far greater than that of excavation length and width, and the influence of excavation width of foundation pit on pile foundation is the least.

参考文献/References:

[1] MROUEH H,SHAHROUR I.Three-dimensional Finite Element Analysis of the Interaction Between Tunneling and Pile Foundations[J].International Journal for Numerical and Analytical Methods in Geomechanics,2002,26(3):217-230.
[2]张陈蓉,黄茂松.基坑开挖引起的邻近建筑物桩基变形受力响应[J].岩土工程学报,2012,34(增):565-570.
ZHANG Chen-rong,HUANG Mao-song.Behavior of Pile Foundation Due to Excavation-induced Lateral Soil Movement[J].Chinese Journal of Geotechnical Engineering,2012,34(S):565-570.
[3]刘松玉,李洪江,童立元,等.地下工程开挖卸荷既有桩基承载响应物理模拟及新进展[J].岩土工程学报,2019,41(7):1329-1338.
LIU Song-yu,LI Hong-jiang,TONG Li-yuan,et al.Model Tests and New Progress of Pile Response Due to Underground Excavations[J].Chinese Journal of Geotechnical Engineering,2019,41(7):1329-1338.
[4]张治国,赵其华,徐 晨,等.基于影像源法的基坑开挖对邻近单桩影响简化分析[J].岩土力学,2016,37(7):2011-2020.
ZHANG Zhi-guo,ZHAO Qi-hua,XU Chen,et al.Simplified Analysis of Adjacent Single-pile Response Subjected to Foundation Pit Excavation Based on Virtual Image Technique[J].Rock and Soil Mechanics,2016,37(7):2011-2020.
[5]张爱军,莫海鸿,李爱国,等.基坑开挖对邻近桩基影响的两阶段分析方法[J].岩石力学与工程学报,2013,32(增1):2746-2750.
ZHANG Ai-jun,MO Hai-hong,LI Ai-guo,et al.Two-stage Analysis Method for Behavior of Adjacent Piles Due to Foundation Pit Excavation[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(S1):2746-2750.
[6]王 恒,陈福全,林 海.基坑开挖对邻近桥梁桩基的影响与加固分析[J].地下空间与工程学报,2015,11(5):1257-1265.
WANG Heng,CHEN Fu-quan,LIN Hai.Behaviors and Strengthening of Bridge Piles Subjected to Excavation-induced Soil Movement[J].Chinese Journal of Underground Space and Engineering,2015,11(5):1257-1265.
[7]丁勇春,王建华.深基坑施工对高架基础的变形影响及控制研究[J].土木工程学报,2012,45(7):155-161.
DING Yong-chun,WANG Jian-hua.Influence of Deep Excavation on Deformation of Elevated Bridge Foundations and Countermeasures[J].China Civil Engineering Journal,2012,45(7):155-161.
[8]木林隆,黄茂松.基坑开挖引起的周边土体三维位移场的简化分析[J].岩土工程学报,2013,35(5):820-827.
MU Lin-long,HUANG Mao-song.Simplified Method for Analysis of Soil Movement Induced by Excavations[J].Chinese Journal of Geotechnical Engineering,2013,35(5):820-827.
[9]王 翠,闫澍旺,张启斌.深基坑开挖对邻近桥桩的影响机制及控制措施研究[J].岩石力学与工程学报,2010,39(增1):2994-3000.
WANG Cui,YAN Shu-wang,ZHANG Qi-bin.Study of Influence of Deep Pit Excavation on Adjacent Bridge Foundation Piles[J].Chinese Journal of Rock Mechanics and Engineering,2010,39(S1):2994-3000.
[10]郑 刚,颜志雄,雷华阳,等.基坑开挖对临近桩基影响的实测及有限元数值模拟分析[J].岩土工程学报,2007,29(5):638-643.
ZHENG Gang,YAN Zhi-xiong,LEI Hua-yang,et al.Field Observation and Finite Element Numerical Simulation Analysis of Effect on Adjacent Piles Due to Excavation[J].Chinese Journal of Geotechnical Engineering,2007,29(5):638-643.
[11]郑俊杰,章荣军,潘玉涛,等.考虑开挖卸荷及变形耦合效应的被动桩分析方法[J].岩土工程学报,2012,34(4):606-614.
ZHENG Jun-jie,ZHANG Rong-jun,PAN Yu-tao,et al.Analytic Method for Passive Piles Considering Excavation-induced Unloading Effects and Deformation Coupling Effect[J].Chinese Journal of Geotechnical Engineering,2012,34(4):606-614.
[12]REZA B A,VOJTECH G.3D Numerical Parametric Study of the Influence of Open-pit Mining Sequence on Existing Tunnels[J].International Journal of Mining Science and Technology,2017,27(3):459-466.
[13]POULOS H G,CHEN L T.Pile Response Due to Excavation-induced Lateral Soil Movement[J].Journal of Geotechnical and Geoenvironmental Engineering,1997,123(2):94-99.
[14]张 骁,肖军华,农兴中,等.基于HS-Small模型的基坑近接桥桩开挖变形影响区研究[J].岩土力学, 2018,39(增2):263-273.
ZHANG Xiao,XIAO Jun-hua,NONG Xing-zhong,et al.Analysis of Influenced Zone of Foundation Pit Excavation Adjacent to Bridge Pile Foundation Using HS-Small Constitutive Model[J].Rock and Soil Mechanics,2018,39(S2):263-273.
[15]张治国,鲁明浩,宫剑飞.黏弹性地基中基坑开挖对邻近桩基变形影响的时域解[J].岩土力学,2017,38(10):3017-3028,3038.
ZHANG Zhi-guo,LU Ming-hao,GONG Jian-fei.Time-domain Solution for Influence of Excavation on Adjacent Pile Deformation in Visco-elastic Foundation[J].Rock and Soil Mechanics,2017,38(10):3017-3028,3038.
[16]黄茂松,张陈蓉,李 早.开挖条件下非均质地基中被动群桩水平反应分析[J].岩土工程学报,2008,30(7):1017-1023.
HUANG Mao-song,ZHANG Chen-rong,LI Zao.Lateral Response of Passive Pile Groups Due to Excavation-induced Soil Movement in Stratified Soils[J].Chinese Journal of Geotechnical Engineering,2008,30(7):1017-1023.
[17]BURMISTER D M.The General Theory of Stresses and Displacements in Layered Soil Systems.Ⅲ[J].Journal of Applied Physics,1945,16(3):126-127.
[18]KERR A D.On the Determination of Foundation Model Parameters[J].Journal of Geotechnical Engineering,1985,111(11):1334-1340.
[19]魏 纲,赵城丽.基坑开挖引起临近地铁隧道的附加荷载计算方法[J].岩石力学与工程学报,2016,35(增1):3408-3417.
WEI Gang,ZHAO Cheng-li.Calculation Method of Additional Load of Adjacent Metro Tunnels Due to Foundation Pit Excavation[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(S1):3408-3417.
[20]TANAHASHI H.Formulas for an Infinitely Long Bernoulli-Euler Beam on the Pasternak Model[J].Soils and Foundations,2004,44(5):109-118.
[21]SHI J,NG C W W,CHEN Y.Three-dimensional Numerical Parametric Study of the Influence of Basement Excavation on Existing Tunnel[J].Computers and Geotechnics,2015,63:146-158.
[22]VESIC A S.Bending of Beams Resting on Isotropic Elastic Solids[J].Journal of the Engineering Mechanics Division,1961,87(2):35-53.
[23]MORFIDIS K.Research and Development of Methods for the Modeling of Foundation Structural Elements and Soil[D].Thessaloniki:Aristotle University of Thessaloniki,2003.
---NEXT MATCH---收稿日期:2020-09-15
基金项目:国家自然科学基金项目(51778058,51378068); 中央高校基本科研业务费专项资金项目(300102219310)
作者简介:刘永健(1966-),男,江西玉山人,教授,博士研究生导师,工学博士,E-mail:liuyongjian@chd.edu.cn。

相似文献/References:

[1]杨 卓,吴剑波,赵一臻,等.地铁深基坑开挖对紧邻建筑影响的有限元模拟与监测研究[J].建筑科学与工程学报,2016,33(02):121.
　Research on Finite Element Simulation and Monitoring of Influence Subway Deep Foundation Pit Excavation on Adjacent Building[J].Journal of Architecture and Civil Engineering,2016,33(05):121.
[2]李玉岐,周 旋,谢康和.坑外荷载对软土地区基坑开挖变形性状的影响[J].建筑科学与工程学报,2016,33(04):97.
　LI Yu-qi,ZHOU Xuan,XIE Kang-he.Influence of Outside Load on Deformation Behavior of Foundation Pit Excavation in Soft Soil Area[J].Journal of Architecture and Civil Engineering,2016,33(05):97.
[3]王成华,王 泽.柔性挡土结构空间土压力性状的三维有限元分析[J].建筑科学与工程学报,2017,34(02):33.
　WANG Cheng-hua,WANG Ze.Three-dimensional Finite Element Analysis on Earth Pressure Behavior of Flexible Retaining Structure[J].Journal of Architecture and Civil Engineering,2017,34(05):33.
[4]张莎莎,苏焰花,樊 林,等.基坑开挖对邻近既有盾构隧道的影响分析[J].建筑科学与工程学报,2022,39(01):134.[doi:10.19815/j.jace.2021.03010]
　ZHANG Sha-sha,SU Yan-hua,FAN Lin,et al.Analysis on Influence of Foundation Pit Excavation on Adjacent Shield Tunnel[J].Journal of Architecture and Civil Engineering,2022,39(05):134.[doi:10.19815/j.jace.2021.03010]

备注/Memo

备注/Memo:
收稿日期:2019-10-10
基金项目:国家自然科学基金项目(41572273,51878157); 江苏省自然科学基金项目(BK20181282)
作者简介:杨 涛(1991-),男,山东临沂人,工学博士研究生,E-mail:yangtao_nxh@seu.cn。
更新日期/Last Update: 2020-10-15