[1]张超哲,童立元,刘松玉,等.后注浆静压复合桩在复杂运营供水结构加固中的应用[J].东南大学学报(自然科学版),2021,(1):46-52.[doi:10.3969/j.issn.1001-0505.2021.01.007]
 Zhang Chaozhe,Tong Liyuan,Liu Songyu,et al.Application of post-grouting static-pressure composite pile in complex operation water supply structure[J].Journal of Southeast University (Natural Science Edition),2021,(1):46-52.[doi:10.3969/j.issn.1001-0505.2021.01.007]
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后注浆静压复合桩在复杂运营供水结构加固中的应用()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
期数:
2021年第1期
页码:
46-52
栏目:
土木工程
出版日期:
2021-01-20

文章信息/Info

Title:
Application of post-grouting static-pressure composite pile in complex operation water supply structure
作者:
张超哲1童立元1刘松玉1韩健勇2余巍3
1东南大学岩土工程研究所, 南京 211189; 2山东建筑大学土木工程学院, 济南 250101; 3南京东大岩土工程勘察设计研究院有限公司, 南京 210000
Author(s):
Zhang Chaozhe1 Tong Liyuan1 Liu Songyu1 Han Jianyong2 Yu Wei3
1Institute of Geotechnical Engineering, Southeast University, Nanjing 211189, China
2School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, China
3Nanjing SEU Geotechnical Engineering Investigation and Design Research Institute Co., Ltd., Nanjing 210000, China
关键词:
既有结构 复合桩 沉降控制 地基基础加固 数值分析
Keywords:
existing structures composite pile settlement control improvement of soil and foundation numerical analysis
分类号:
TU473
DOI:
10.3969/j.issn.1001-0505.2021.01.007
摘要:
为解决既有建构筑物地基基础加固工程所面临的施工条件有限、工期紧张以及沉降控制严格等问题,基于南京某复杂运营供水结构加固工程,提出了一种后注浆静压复合桩(PSCP)加固技术.采用数值分析的方法,结合现场观测数据,对加固过程和长期沉降进行评价,并对比分析了桩长、桩径、反力梁高度等参数对加固效果的影响.结果表明:PSCP桩具有施工扰动小和适应于狭小施工场地作业的特点,施工引起的地表沉降增量在3.2 mm以内;增加桩径,地表最大沉降量可减小6.84%;桩长和加固梁高度的增加对加固效果影响不明显,地表最大沉降量仅减小2.91%和1.39%;工后沉降趋于稳定,该加固技术在加固工程中具有良好的适用性.
Abstract:
To solve the problems of limited construction conditions, tight construction period and strict settlement control of existing building foundation reinforcement projects, a post-grouting static-pressure composite pile(PSCP)reinforcement technology was proposed based on a reinforcement project for a complex operating water supply structure in Nanjing. The reinforcement process and long-term settlement were evaluated by numerical analysis based on the field observation data. The influence of the pile length, the pile diameter and the reaction beam height on the reinforcement effect was compared and analyzed. The results show that the PSCP piles have the characteristics of less construction disturbance and adaptability to operation in a narrow construction site. The increment of the surface subsidence caused by construction is within 3.2 mm. The increase of the pile diameter can reduce the maximum surface settlement by 6.84%. The increase of the pile length and the reinforced beam height has no obvious effect on the reinforcement effect, and the maximum settlement amount is only reduced by 2.91% and 1.39%, respectively. The settlement after construction tends to be stable, and this technology has good applicability in reinforcement projects.

参考文献/References:

[1] 刘丽萍,李向阳,王德伟,等.预压托换桩加固及顶升纠偏工程实践[J].岩石力学与工程学报,2005,24(15):2795-2801.DOI: 10.3321/j.issn:1000-6915.2005.15.032.
Liu L P, Li X Y, Wang D W, et al. Foundation reinforcement and building rectification of deviation by jack-up and preloading underpinning pile[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(15): 2795-2801. DOI:10.3321/j.issn:1000 -6915.2005.15.032. (in Chinese)
[2] 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(S1):77-80. DOI:10.11779/ CJGE2019S1020.
Pan J, Yuan W J, Wei S L, et al. Shaft bearing behaviors of micro cast-place piles with steel tubes[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(S1): 77-80. DOI:10.11779 /CJGE2019S1020. (in Chinese)
[3] Ramadan M I, Butt S D, Popescu R. Offshore anchor piles under mooring forces: Centrifuge modeling[J]. Canadian Geotechnical Journal, 2013, 50(4): 373-381. DOI:10.1139/cgj-2012-0250.
[4] 杜斌,刘祖德,聂向珍,等.既有建筑物基础托换技术中的钢管纤维桩工法[J].岩土力学,2007,28(5):1040-1044. DOI: 10.3969/j.issn.1000-7598.2007.05.036.
Du B, Liu Z D, Nie X Z, et al. Steel fiber pile technology in underpinning project of existing buildings[J]. Rock and Soil Mechanics, 2007, 28(5): 1040-1044. DOI:10.3969/j.issn.1000-7598.2007.05.036. (in Chinese)
[5] 张媛,赵来顺,唐丽云,等.预压托换桩的回弹机理及控制方法研究[J].岩土工程学报,2007,29(1):112-115. DOI: 10.3321/j.issn:1000-4548.2007.01.019.
Zhang Y, Zhao L S, Tang L Y, et al. Study on mechanics of rebound and controlling of preloading piles[J]. Chinese journal of geotechnical engineering, 2007, 29(1): 112-115. DOI:10.3321/ j.issn:1000-4548.2007.01.019. (in Chinese)
[6] Mei C, Fu X D, Zhang B J. Structural analysis and design of slipway floor with anchor jacked piles[J]. Applied Mechanics and Materials, 2014, 501/502/503/504: 185-192. DOI:10.4028/www.scientific.net/amm.501-504.185.
[7] 张海聪.桩梁托换技术在地基基础加固中的应用研究[D].石家庄:石家庄铁道大学,2017.
  Zhang H C. Study on pile and beam underpinning technology in the founding reinforcement[D]. Shijiazhuang: Shijiazhuang Tiedao University, 2017.(in Chinese)
[8] 中华人民共和国住房和城乡建设部.既有建筑地基基础加固技术规范:JGJ 123—2012[S].北京:中国建筑工业出版社,2013.
[9] Nakai K, Noda T, Kato K. Seismic assessment of sheet pile reinforcement effect on river embankments constructed on a soft foundation ground including soft estuarine clay[J]. Canadian Geotechnical Journal, 2017, 54(10): 1375-1396. DOI:10.1139/cgj-2016-0019.
[10] 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. DOI:10.1007/s10064-020-01723-z.
[11] Zhou D Q, Feng C X, Li L X, et al.Reinforcement effect of inclined prestressed concrete pipe piles on an inclined soft foundation[J]. Advances in Civil Engineering, 2020, 2020: 1-12. DOI:10.1155/2020/5275903
[12] 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 Y W, Liu S Y, Hu M L, et al. Deformation control techniques for existing buildings during construction process of basement[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(10): 1914-1921.(in Chinese)
[13] Esfeh P K, Kaynia A M. Numerical modeling of liquefaction and its impact on anchor piles for floating offshore structures[J]. Soil Dynamics and Earthquake Engineering, 2019, 127: 105839. DOI:10.1016/j.soildyn.2019.105839.
[14] 刘万兴,张璞.锚杆静压桩施工产生的附加沉降问题初探[J].岩土力学,2000,21(1):88-91. DOI: 10.3969/j.issn.1000-7598.2000.01.022.
Liu W X, Zhang P. Preliminary discussion of addition settlement due to static driving pile using anchored piles[J]. Rock and Soil Mechanics, 2000, 21(1): 88-91. DOI:10.3969/j.issn.1000-7598.2000.01.022. (in Chinese)
[15] 李永盛,刘万兴.锚杆静压桩沉桩挤土效应的实用计算方法[J].同济大学学报(自然科学版),2000,28(4):492-496.
  Li Y S, Liu W X. Practical calculation method of soil compaction effect of anchor jacked pile while sinking[J]. Journal of Tongji University, 2000, 28(4): 492-496.(in Chinese)
[16] 刘毓氚,陈福全.锚杆静压桩在危险建筑物加固中的应用研究[J].岩石力学与工程学报,2002,21(1):130-132. DOI: 10.3321/j.issn:1000-6915.2002.01.027.
Liu Y C, Chen F Q. Application research on static bolt-pile reinforcement for dangerous building[J]. Chinese Journal of Rock Mechanics and Engineering, 2002, 21(1): 130-132. DOI:10.3321/j.issn:1000-6915.2002.01.027. (in Chinese)
[17] 李韬,毕兆云,高大钊.按复合桩基设计锚杆静压桩处理地基[J].岩土力学,2004,25(7):1171-1174. DOI: 10.3969/j.issn.1000-7598.2004.07.037.
Li T, Bi Z Y, Gao D Z. Foundation treatment using jacked anchor pile with composite pile design concept[J]. Rock and Soil Mechanics, 2004, 25(7): 1171-1174. DOI:10.3969/j.issn.1000-7598.2004.07.037. (in Chinese)
[18] 贾强,应惠清,张鑫.锚杆静压桩技术在既有建筑物增设地下空间中的应用[J].岩土力学,2009,30(7):2053-2057.DOI:10.3969/j.issn.1000-7598.2009.07.031.
Jia Q, Ying H Q, Zhang X. Construction of basement in existing buildings by static bolt-pile[J]. Rock and Soil Mechanics, 2009, 30(7): 2053-2057. DOI:10.3969/j.issn.1000-7598.2009.07.031. (in Chinese)
[19] 韩红娟,郑七振.锚杆静压桩群桩效应分析[J].水资源与水工程学报,2012,23(3):108-113.
  Han H J, Zheng Q Z. Analysis of effect for anchored silent group pile[J]. Journal of Water Resources & Water Engineering, 2012, 23(3): 108-113.(in Chinese)
[20] 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(S2):224-229.
  Wen Y W, Hu M L,Han S Y, 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.(in Chinese)

备注/Memo

备注/Memo:
收稿日期: 2020-06-21.
作者简介: 张超哲(1994—),男,博士生;童立元(联系人),男,博士,教授,博士生导师,101010519@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(51878157)、江苏省自然科学基金资助项目(BK20181282).
引用本文: 张超哲,童立元,刘松玉,等.后注浆静压复合桩在复杂运营供水结构加固中的应用[J].东南大学学报(自然科学版),2021,51(1):46-52. DOI:10.3969/j.issn.1001-0505.2021.01.007.
更新日期/Last Update: 2021-01-20