|Table of Contents|

Field Test on Deformation Characteristics of Existing Foundation Reinforced by Micro Steel Pipe Pile(PDF)

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

Issue:
2022年05期
Page:
222-233
Research Field:
基础工程
Publishing date:

Info

Title:
Field Test on Deformation Characteristics of Existing Foundation Reinforced by Micro Steel Pipe Pile
Author(s):
KONG Gang-qiang1;  YU Jiang-hua1;  REN Lian-wei2;  WANG Wen-ming3;  HU Da4;  LI Liu-xi4
(1. Key Laboratory of Geomechanics and Embankment Engineering, Ministry of Education, Hohai University, Nanjing 210098, Jiangsu, China; 2. School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan, China; 3. School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, China; 4. College of Civil Engineering, Hunan City University, Yiyang 413000, Hunan, China)
Keywords:
existing foundation;  micro steel pipe pile;  reinforcement;  deformation characteristic;  field test
PACS:
TU472.99
DOI:
10.19815/j.jace.2021.08066
Abstract:
Based on the existing foundation reinforcement project of Henan Polytechnic University boiler house, the construction steps of the existing cast-in-place pile foundation reinforced by the micro steel pipe pile group were optimized, and the foundation and column were simplified as a beam model fixed at one end and simply supported at the other, then its accuracy was verified. The field test on the deformation characteristics of the existing foundation reinforced by the micro steel pipe pile was carried out. The surface displacement between the existing column and two columns and the change law of the column angle were measured during the construction of the micro steel pipe piles. The influences of construction sequence with the combination of clockwise and counterclockwise and single counterclockwise pile group sequence on the existing columns and surface displacement were compared. The mechanism of the deformation(displacement and inclination)of the existing upper column structure during the construction of the micro steel pipe piles was discussed. The results show that the pile group construction sequence with the combination of clockwise and counterclockwise is better than that with the single counterclockwise pile, and the maximum surface displacement can be reduced by about 50%. The maximum surface displacements caused by the combination of clockwise and counterclockwise and the single counterclockwise construction sequence ares 1/6 and 1/4 of the displacement of the existing upper column, respectively. The first construction micro steel pipe piles will have a certain effect of shielding and reinforcing the surrounding soil layer, then the soil disturbance and displacement caused by the post-construction piles in this direction are relatively reduced, so the influence of micro steel pipe pile construction on the existing upper column structure is also reduced. Under the two construction sequence test conditions, the maximum displacement and stress generally appear in the construction process of the third or fourth pile.

References:

[1] 刘 华,胡文乐,王铁行,等.碱液加固黄土的电阻率特征试验及其效果评价[J].建筑科学与工程学报,2021,38(2):99-107.
LIU Hua,HU Wen-le,WANG Tie-hang,et al.Resistivity Characteristics Test and Effect Evaluation of Alkali Solution Strengthening Loess[J].Journal of Architecture and Civil Engineering,2021,38(2):99-107.
[2]MA L Q,YANG K,YUAN W Z,et al.Centrifuge Modeling of the Pile Foundation Reinforcement on Slopes Subjected to Uneven Settlement[J].Bulletin of Engineering Geology and the Environment,2020,79(5):2647-2658.
[3]LIN P,ZHOU W Y,LIU H Y.Experimental Study on Cracking,Reinforcement,and Overall Stability of the Xiaowan Super-high Arch Dam[J].Rock Mechanics and Rock Engineering,2015,48(2):819-841.
[4]朱彦鹏,王海明,杨奎斌,等.桩基础高层建筑纠倾加固方法及工程实践[J].建筑科学与工程学报,2018,35(3):87-94.
ZHU Yan-peng,WANG Hai-ming,YANG Kui-bin,et al.Rectifying and Strengthening Method for Pile Foundation of High-rise Building and Engineering Practice[J].Journal of Architecture and Civil Engineering,2018,35(3):87-94.
[5]阳军生,杨元洪,晏 莉,等.大断面隧道下穿既有高压输电铁塔施工方案比选及其应用[J].岩石力学与工程学报,2012,31(6):1184-1191.
YANG Jun-sheng,YANG Yuan-hong,YAN Li,et al.Construction Scheme Choice of Large-span Tunnels Under-passing High Voltage Transmission Tower and Its Application[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(6):1184-1191.
[6]朱彦鹏,陈琰娇.抛石挤淤加固公路软基机理研究[J].建筑科学与工程学报,2016,33(4):17-24.
ZHU Yan-peng,CHEN Yan-jiao.Study on Mechanism of Reinforcing Soft Soil Foundation of Highway by Dumping Riprap to Extrude Silt[J].Journal of Architecture and Civil Engineering,2016,33(4):17-24.
[7]曹明星,高永涛,周 喻.基于树根桩地基加固法的井塔纠偏方案[J].中南大学学报(自然科学版),2020,51(10):2906-2916.
CAO Ming-xing,GAO Yong-tao,ZHOU Yu.Correction Scheme of Auxiliary Shaft Tower Based on Foundation Reinforcement Method Using Root Piles[J].Journal of Central South University(Science and Technology),2020,51(10):2906-2916.
[8]文颖文,刘松玉,胡明亮,等.地下增层工程中既有结构变形控制技术研究[J].岩土工程学报,2013,35(10):1914-1921.
WEN Ying-wen,LIU Song-yu,HU Ming-liang,et al.Deformation Control Techniques for Existing Buildings During Construction Process of Basement[J].Chinese Journal of Geotechnical Engineering,2013,35(10):1914-1921.
[9]ZHOU M,SU X L,LEI J S,et al.Foundation Reinforcement and Deviation Rectifying of the Leaning Pagoda of Dinglin Temple[J].Proceedings of the Institution of Civil Engineers — Geotechnical Engineering,2019,173(6):473-484.
[10]刘念武,张忠苗,俞 峰,等.黏性土中微型桩抗压和抗拔现场试验[J].天津大学学报(自然科学与工程技术版),2013,46(8):698-704.
LIU Nian-wu,ZHANG Zhong-miao,YU Feng,et al.Field Tests on Micropiles in Clay Subjected to Compression and Uplift[J].Journal of Tianjin University(Science and Technology),2013,46(8):698-704.
[11]陈 贺,张玉芳,张新民,等.高压注浆钢花管微型桩抗滑特性足尺模型试验研究[J].岩土力学,2020,41(2):428-436.
CHEN He,ZHANG Yu-fang,ZHANG Xin-min,et al.Full-scale Model Experiments on Anti-sliding Characteristics of High-pressure Grouting Steel-tube Micropiles[J].Rock and Soil Mechanics,2020,41(2):428-436.
[12]潘 健,袁文俊,韦莎丽,等.微型钢管灌注桩的竖向承载性状研究[J].岩土工程学报,2019,41(增1):77-80.
PAN Jian,YUAN Wen-jun,WEI Sha-li,et al.Shaft Bearing Behaviors of Micro Cast-place Piles with Steel Tubes[J].Chinese Journal of Geotechnical Engineering,2019,41(S1):77-80.
[13]WEN L,KONG G Q,LI Q S,et al.Field Tests on Axial Behavior of Grouted Steel Pipe Micropiles in Marine Soft Clay[J].International Journal of Geomechanics,2020,20(6):06020006.
[14]WEN L,KONG G Q,ABUEL-NAGA H,et al.Rectification of Tilted Transmission Tower Using Micropile Underpinning Method[J].Journal of Performance of Constructed Facilities,2020,34(1):04019110.
[15]HAQUE M N,ABU-FARSAKH M Y,TSAI C.Field Investigation to Evaluate the Effects of Pile Installation Sequence on Pile Setup Behavior for Instrumented Test Piles[J].Geotechnical Testing Journal,2016,39(5):769-785.
[16]张建新,鹿 群,吴东云,等.基于模型试验的静压群桩引起的土体变形分析[J].岩土力学,2010,31(4):1243-1246,1252.
ZHANG Jian-xin,LU Qun,WU Dong-yun,et al.Analysis of Soil Deformation in Jacked Pile Group Based on the Model Test[J].Rock and Soil Mechanics,2010,31(4):1243-1246,1252.
[17]解廷伟,左殿军,王绪锋,等.静压桩沉桩过程中地下排污管的动态响应数值分析[J].水利学报,2015,46(增1):168-172.
XIE Ting-wei,ZUO Dian-jun,WANG Xu-feng,et al.Numerical Study on Dynamic Response of Underground Sewage Disposal Pipe Due to Pile Jacked[J].Journal of Hydraulic Engineering,2015,46(S1):168-172.
[18]宋福贵,王炳龙,黄大维,等.钢套管灌注群桩施工顺序对多隧道的影响[J].岩土力学,2012,33(8):2330-2336.
SONG Fu-gui,WANG Bing-long,HUANG Da-wei,et al.Influence of Construction Sequence of Cast-in-place Group Piles with Steel Sleeve on Tunnels[J].Rock and Soil Mechanics,2012,33(8):2330-2336.
[19]钱 程.超长钢管静压桩加固既有建筑物的应用研究[D].南京:东南大学,2017.
QIAN Cheng.Study on the Application of Super-long Steel Tube Static Pressure Pile in Strengthening Existing Buildings[D].Nanjing:Southeast University,2017.
[20]建筑地基基础设计规范:GB 50007—2011[S].北京:中国建筑工业出版社,2012.
Code for Design of Building Foundation:GB 50007—2011[S].Beijing:China Architecture & Building Press,2012.
[21]文颖文,胡明亮,韩顺有,等.既有建筑地下室增设中锚杆静压桩技术应用研究[J].岩土工程学报,2013,35(增2):224-229.
WEN Ying-wen,HU Ming-liang,HAN Shun-you,et al.Application of Static Bolt-pile Technique to Construction of Basement of Existing Buildings[J].Chinese Journal of Geotechnical Engineering,2013,35(S2):224-229.

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Last Update: 2022-09-30