设计、施工、监测

MJS套打钻孔灌注桩施工扰动变形特性研究

  • 李平 ,
  • 马向前 ,
  • 陈育民 ,
  • 刘光辉 ,
  • 李焱
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  • 1.河海大学 岩土力学与堤坝工程教育部重点实验室,南京 210098;
    2.河海大学 土木与交通学院,南京 210098;
    3.南京上铁地方铁路开发有限公司,南京 210003;
    4.江西省水利科学院,南昌 330029
李平(1982—),男,江苏徐州人,博士,教授,主要从事地下工程防灾减灾的教学与科研工作。E-mail:lipings0110@163.com
马向前(1998—),男,山西运城人,硕士生,主要从事软土地基处理方面的研究工作。E-mail:1332010372@qq.com

收稿日期: 2024-06-29

  网络出版日期: 2025-05-06

基金资助

国家自然科学基金(41977240);江西省水利厅科技项目(202325ZDKT16)

Optimization Analysis of Deformation Characteristics of Construction Disturbance of MJS Set Bored Pile

  • Li Ping ,
  • Ma Xiangqian ,
  • Chen Yumin ,
  • Liu Guanghui ,
  • Li Yan
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  • 1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, P.R. China;
    2. College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, P.R. China;
    3. Nanjing Shangtie Local Railway Development Co., Ltd., Nanjng 210003, P.R. China;
    4. Jiangxi Academy of Water Science and Engineering, Nanchang 330029, P.R. China

Received date: 2024-06-29

  Online published: 2025-05-06

摘要

针对狭小密闭空间内深基坑开挖支护难的问题,研发了高压喷射注浆系统(Metro Jet System, MJS)止水帷幕套打钻孔灌注桩的微扰动支护方案。以海安火车站站房扩建项目三期深基坑工程为例,应用Plaxis 3D有限元分析软件建立三维数值计算模型,对MJS止水帷幕在不同喷浆压力、喷浆范围、桩径大小和施工顺序工况下对临近既有建筑物桩基的变形影响进行了优化分析。结果表明:随着MJS桩喷浆压力系数的增大,既有桩基等深度处水平变形位移呈线性增长;随着MJS桩喷浆范围的减小,施工对临近既有桩基的变形影响沿桩深方向均有所减小;既有桩基变形位移随MJS桩径大小呈非线性变化;考虑多桩不同施工顺序的影响,从中间往两边对称的施工方法对临近既有桩基的累积变形量最小。研究成果可为类似狭小密闭空间内基坑开挖支护提供经验。

本文引用格式

李平 , 马向前 , 陈育民 , 刘光辉 , 李焱 . MJS套打钻孔灌注桩施工扰动变形特性研究[J]. 地下空间与工程学报, 2025 , 21(2) : 620 -628 . DOI: 10.20174/j.JUSE.2025.02.29

Abstract

A micro-disturbance support technique using MJS waterproof wall set drilling and grouting piles has been designed to tackle the challenge of difficult excavation and support of deep foundation pits in narrow and confined spaces. Employing the Plaxis 3D finite element analysis software, a 3D numerical calculation model was established based on the third phase of the deep foundation pit project of the Hai'an railway station expansion project in order to optimize the impact of the MJS waterproof wall on the deformation of the pile foundation of adjacent existing buildings under various working conditions, including grouting pressure, grouting range, pile diameter, and construction sequence. The results indicate that the horizontal deformation displacement at the depth of existing pile foundations increases linearly with the MJS pile grout pressure coefficient; the deformation effect on adjacent existing pile foundations decreases along the pile depth direction with the reduction in MJS pile grout range; the deformation displacement of existing pile foundations changes non-linearly with the MJS pile diameter; considering the effect of different construction sequences of multiple piles, the symmetric construction method from the middle to both sides has the least cumulative deformation on the nearby existing pile foundation, which can provide experience for the excavation and support of the foundation pit in similar narrow and confined spaces.

参考文献

[1] 杨善统. 建筑密集区超大深基坑开挖变形模型试验研究[J]. 地下空间与工程学报,2022, 18(增1): 147-155.(Yang Shantong. Model test Study on Deformation of Super-Large Deep Foundation PitExcavation in Built-up Area[J]. Chinese Journal of Underground Space and Engineering, 2022, 18(Supp.1): 147-155. (in Chinese))
[2] 马伟亮, 李顺群, 叶茂松, 等. 基坑开挖对邻近隧道变形影响的解析方法研究[J]. 地下空间与工程学报,2023, 19(2): 446-455.(Ma Weiliang, Li Shunqun, Ye Maosong, et al. Analysis on the Influence of Foundation Pit Excavation on the Deformation ofAdjacent Tunnels[J]. Chinese Journal of Underground Space and Engineering, 2023, 19(2): 446-455. (in Chinese))
[3] 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.(Gang Zheng, Zhi-xiong Yan, Hua-yang Lei, 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. (in Chinese))
[4] 郑刚. 软土地区基坑工程变形控制方法及工程应用[J]. 岩土工程学报,2022, 44(1): 1-36.(Zheng Gang. Method and application of deformation control of excavations in soft ground[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(1): 1-36. (in Chinese))
[5] 徐中华, 王卫东. 深基坑变形控制指标研究[J]. 地下空间与工程学报,2010, 6(3): 619-626.(Xu Zhonghua, Wang Weidong. Deformation Control Criteria of Deep Excavations[J]. Chinese Journal of Underground Space and Engineering, 2010, 6(3): 619-626. (in Chinese))
[6] 戴斌, 李靖, 陈永才, 等. 复杂环境超大面积深基坑整坑实施设计与实践[J]. 地下空间与工程学报,2022, 18(5): 1657-1664.(Dai Bin, Li Jing, Chen Yongcai, et al. Whole Pit Design and Practice of Super-Large Area Deep Foundation Pit inComplicated Environment[J]. Chinese Journal of Underground Space and Engineering, 2022, 18(5): 1657-1664. (in Chinese))
[7] 郑刚, 王玉萍, 程雪松, 等. 基坑倾斜桩支护性能及机理大型模型试验研究[J]. 岩土工程学报,2021, 43(9): 1581-1591.(Zheng Gang, Wang Yuping, Cheng Xuesong, et al. Large-scale model tests on performance and mechanism ofinclinedretaining structures of excavations[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(9): 1581-1591. (in Chinese))
[8] 高盟, 高广运, 冯世进, 等. 基坑开挖引起紧贴运营地铁车站的变形控制研究[J]. 岩土工程学报,2008(6): 818-823.(Gao Meng, Gao Guangyun, Feng Shijin, et al. Control of deformation of operating subway station induced by adjacent deep excavation[J]. Chinese Journal of Geotechnical Engineering, 2008(6): 818-823. (in Chinese))
[9] 郑刚, 刘庆晨, 邓旭, 等. 基坑开挖对下卧运营地铁既有箱体影响的实测及分析[J]. 岩土力学,2012, 33(4): 1109-1116.(Zheng Gang, Liu Qingchen, Deng Xu, et al. Field measurement and analysis of effect of excavation on existing tunnel boxes of underlying metro tunnel in operating[J]. Rock and Soil Mechanics, 2012, 33(4): 1109-1116. (in Chinese))
[10] 费纬. 隔离桩在紧邻浅基础建筑的深基坑工程变形控制中的应用[J]. 岩土工程学报,2010, 32(增1): 265-270.(Fei Wei. Application of isolation piles to deformation control of deep foundation pitsclose to buildings with shallow foundation[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(Supp.1): 265-270. (in Chinese))
[11] 郑刚, 杜一鸣, 刁钰. 隔离桩对基坑外既有隧道变形控制的优化分析[J]. 岩石力学与工程学报,2015, 34(增1): 3499-3509.(Zheng Gang, Du Yiming, Diao Yu. Optimization analysis of efficiency of isolation ples incontrolling the deformation of existing tunnelsadjacent to deep excavation[J]. Chinese Journal of Rock Mechanics and Engineering, 2015, 34(Supp.1): 3499-3509. (in Chinese))
[12] Nakashima S, Nakanishi W. All-around type reinforcing and consolidating method in the ground and apparatus thereof [P].U.S.Patent: GB 19930016840.1995-3-28.
[13] 梁利, 李恩璞, 王庆国, 等. MJS工法在轻轨车站换乘通道中的工程实践[J]. 地下空间与工程学报,2012, 8(1): 135-139.(Liang Li, Li Enpu, Wang Qingguo, et al. Practice of MJS method in light railway inter change passage construction in Shanghai[J]. Chinese Journal of Underground Space and Engineering, 2012, 8(1): 135-139. (in Chinese))
[14] Nakashima K, Kashima T, Sakuma T, et al. Applications of MJS method (Metro Jet System) -all-around type reinforcing and consolidating method in the ground[J]. Grouting and Deep Mixing Proc Conference, Tokyo, 1996, 1: 333-336.
[15] 张帆. 二种先进的高压喷射注浆工艺[J]. 岩土工程学报,2010, 32(增2): 406-409.(Zhang Fan. Two advanced jet grout methods[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(Supp.2): 406-409. (in Chinese))
[16] 徐晓兵, 姜叶翔, 童磊, 等. 邻近地铁基坑后插型钢MJS工法桩试桩研究[J]. 地下空间与工程学报,2021, 17(增2): 854-860. (Xu Xiaobing, Jiang Yexiang, Tong Lei, et al. Field tests on MJS piles of post-inserted H-shaped steel in soil excavation adjacent to the subway[J]. Chinese Journal of Underground Space and Engineering, 2021, 17(Supp.2): 854-860. (in Chinese))
[17] 毛祖夏, 杨兰强, 李佳明. MJS工法与高压旋喷桩(双重管)挤土效应对比试验研究[J]. 隧道建设(中英文),2021, 41(10): 1699-1707.(Mao Zuxia, Yang Lanqiang, Li Jiaming. Experimental study on compaction effect between metro jet system methodand high-pressure jet grouting pile (double-tube)[J]. Tunnel Construction, 2021, 41(10): 1699-1707. (in Chinese))
[18] 赵香山, 李春涛, 王建华. 软土中MJS工法桩施工环境效应的数值分析[J]. 地下空间与工程学报,2016, 12(5): 1315-1319.(Zhao Xiangshan, Li Chuntao, Wang Jianhua. Numerical analysis on the installation effect of MJS pile in soft clay[J]. Chinese Journal of Underground Space and Engineering, 2016, 12(5): 1315-1319. (in Chinese))
[19] 姚志雄, 夏华灿, 黄敏, 等. 福州滨海软土MJS工法桩加固施工及环境效应[J]. 地下空间与工程学报,2023, 19(3): 1019-1026.(Yao Zhixiong, Xia Huacan, Huang Min, et al. Construction and environmental effect of MJS pile strengthening soft soil in fuzhou coastal area[J]. Chinese Journal of Underground Space and Engineering, 2023, 19(3): 1019-1026. (in Chinese))
[20] 谢雄耀, 郁宏杰, 王庆国, 等. 基坑开挖引起下卧既有电力隧道变形的控制技术研究[J]. 岩土工程学报,2014, 36(1): 88-97.(Xie Xiongyao, Yu Hongjie, Wang Qingguo, et al. Deformation control of operating tunnels induced by deep excavation ofoverlying metro[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(1): 88-97. (in Chinese))
[21] 吴昌将, 张子新, 丁文其, 等. 盾构侧穿邻近古建筑的施工影响分析及保护措施加固效果的研究[J]. 岩土工程学报,2012, 34(1): 158-165.(Wu Changjiang, Zhang Zixin, Ding Wenqi, et al. Influences of construction of side-crossing shield tunnel on adjacentancient architectures and reinforcement effect of protection measures[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(1): 158-165. (in Chinese))
[22] 陈仁朋, 张品, 刘湛, 等. MJS水平桩加固在盾构下穿既有隧道中应用研究[J]. 湖南大学学报(自然科学版),2018, 45(7): 103-110.(Chen Renpeng, Zhang Pin, Liu Zhan, et al. Application study of MJS horizontal column reinforcement in shield tunneling[J]. Journal of Hunan University(Natural Sciences), 2018, 45(7): 103-110. (in Chinese))
[23] 张子新, 李佳宇. MJS法地基处理技术综述与应用[J]. 土木建筑与环境工程,2017, 39(6): 1-11.(Zhang Zixin, Li Jiayu. Review and applications of MJS techniques for ground improvement[J]. Journal of Civil and Environmental Engineering, 2017, 39(6): 1-11. (in Chinese))
[24] 王卫东, 李青, 徐中华, 等. 软黏土小应变本构模型参数研究与应用[J]. 地下空间与工程学报,2023, 19(3): 844-855.(Wang Weidong, Li Qing, Xu Zhonghua, et al. Investigation and application of small-strain model parameters for soft clay deposits[J]. Chinese Journal of Underground Space and Engineering, 2023, 19(3): 844-855. (in Chinese))
[25] 顾晓强, 吴瑞拓, 梁发云, 等. 上海土体小应变硬化模型整套参数取值方法及工程验证[J]. 岩土力学,2021, 42(3): 833-845.(Gu Xiaoqiang, Wu Ruituo, Liang Fayun, et al. On HSS model parameters for Shanghai soils with engineering verification[J]. Rock and Soil Mechanics, 2021, 42(3): 833-845. (in Chinese))
[26] 中华人民共和国住房和城乡建设部. 建筑基坑工程监测技术规范(GB 50497—2019)[S]. 北京:中国计划出版社, 2019.(Ministry of Housing and Urban-Rural Development of the People's Republic of China. Technical standard for monitoring of building excavation engineering (GB 50497—2019)[S]. Beijing: China Planning Press, 2019. (in Chinese))
[27] Song D Q, Chen Z, Dong L H, et al. Monitoring analysis of influence of extra-large complex deep foundation pit on adjacent environment: A case study of Zhengzhou City, China[J]. Geomatics Natural Hazards & Risk, 2020, 11(1): 2036-2057.
[28] 叶琪, 王国权, 杨兰强, 等. 宁波软土地区MJS工法桩施工对临近既有建筑物的影响分析[J]. 隧道建设(中英文),2017, 37(11): 1379-1386.(Ye Qi, Wang Guoquan, Yang Lanqiang, et al. Analysis of influence of MJS(Metro Jet System) pile construction on adjacent existing buildings in soft soil area in Ningbo[J]. Tunnel Construction, 2017, 37(11): 1379-1386. (in Chinese))
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