盾构隧道下穿不同基桩数量群桩基础施工影响

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摘要 研究目的: 在盾构隧道下穿群桩基础的施工过程中,不同大小的承台面积和基桩数量,对于盾构下穿群桩基础有什么影响,是地铁隧道施工中值得关注的问题之一。为探究盾构隧道下穿施工对不同大小承台和不同数量基桩群桩基础的影响,以低承台摩擦型群桩基础为研究对象,分析盾构隧道正向下穿和侧向下穿不同大小承台群桩基础的承台沉降和倾斜规律,以及侧向下穿时的承台水平位移。
研究结论: (1)盾构隧道下穿群桩基础时,同一水平间距条件下,承台顶中心位置沉降均随着承台面积和基桩数的增大而增大,而对承台倾斜度影响差别不大;(2)侧向下穿时,承台水平位移随着承台面积和基桩数的增大而增大;(3)当水平间距小于2倍洞径,特别是盾构隧道正向下穿群桩基础时,承台大小和基桩数对群桩基础的沉降影响较大,群桩效应较为明显;(4)本研究成果可为盾构隧道下穿群桩基础的设计与施工提供借鉴和参考。

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	汤劲松
	张宝
	赵书银
	姜景双

关键词 ：盾构隧道, 下穿施工, 群桩基础, 承台大小, 基桩数量

Abstract：Research purposes: During the construction process of pile group foundations undercrossed by shield tunnel, what impact to pile group foundation with different area of foundation caps and different number of foundation piles is a concern problem to construction of metro tunnel. In order to explore the influence of shield tunnel underpass construction on pile foundations of different sizes of caps and different number of foundation piles, the low cap and friction pile group foundation was taken as the research object. The settlement and inclination law of cap were analyzed for different sizes of pile caps undercrossed by shield tunnel directly and laterally, as well as the horizontal displacement of the cap were analyzed when shield laterally passes under pile group foundation.
Research conclusions: (1) When shield tunnel pass under pile group foundation with the same horizontal spacing, the settlement of center position of the top of cap increases with the increase of area of cap and the number of foundation piles, and there is little difference in the impact of inclination of cap. (2) When shield tunnel laterally underpasses pile group foundation, the horizontal displacement of cap increases with the increase of area of cap and the number of foundation piles. (3) When the horizontal spacing is less than 2 times of tunnel diameter, especially shield tunnel directly passes under pile group foundation, the size of cap and the number of foundation piles has a greater impact on the settlement of pile group foundation, and the pile group effect is more obvious. (4) The research results can provide reference for design and construction of pile group foundation undercrossed by shield tunnel.

Key words： shield tunnel undercrossing construction pile group foundation size of cap number of foundation piles

收稿日期: 2022-05-05

PACS:	U231.3
	U455.43

基金资助:河北省自然科学基金资助项目(E2014210021)

作者简介: ^**汤劲松,1970年出生,男,教授。

引用本文:

汤劲松, 张宝, 赵书银, 姜景双. 盾构隧道下穿不同基桩数量群桩基础施工影响[J]. 铁道工程学报, 2022, 39(11): 94-99.
TANG Jinsong, ZHANG Bao, ZHAO Shuyin, JIANG Jingshuang. Construction Influence of Pile Group Foundation with Different Number of Foundation Piles Undercrossed by Shield Tunnel. Journal of Railway Engineering Society, 2022, 39(11): 94-99.

链接本文:

https://tdgcxb.crec.cn/CN/ 或 https://tdgcxb.crec.cn/CN/Y2022/V39/I11/94

[1]	秦东平,何平,张海彦.盾构隧道施工对桩基影响的解析理论研究[J]. 铁道工程学报,2021(7):80-88.Qin Dongping,He Ping,Zhang Haiyan.Analytical Theoretical Study on the Influence of Shield Tunnel Constructionon Pile Foundation[J]. Journal of Railway Engineering Society,2021(7):80-88.
[2]	宫全美,张润来,余杰,等.桩底盾构施工引起的桩基承载力损失计算[J]. 同济大学学报:自然科学版,2018(10):1384-1391.Gong Quanmei,Zhang Runlai,Yu Jie,etc. Calcating Method of Pile Bearing Capacity Loss Induced by the Tunnel Excavation Underneath the Pile[J]. Journal of Tongji University:Natural Science,2018(10):1384-1391.
[3]	胡德华,段景川. 盾构掘进对邻近桩基的变形特征研究[J]. 隧道建设,2015(5):413-418.Hu Dehua,Duan Jingchuan. Study on Characteristics of Deformation of Adjacent Pile Foundations Caused by Shield Boring[J]. Tunnel Construction,2015(5):413-418.
[4]	李梓亮,汤劲松,赵书银,等. 盾构隧道下穿砌体结构住宅群的施工技术[J]. 城市轨道交通研究,2021(6):115-120.Li Ziliang,Tang Jinsong,Zhao Shuyin,etc. Construction Technology of Shield Tunnel Undercrossing Masonry Structure Residential group[J]. Urban Mass Transit,2021(6): 115-120.
[5]	化建新,郑建国. 工程地质手册[M]. 北京:中国建筑工业出版社,2018.Hua Jianxin,Zheng Jianguo. Engineering Geological Manual[M]. Beijing: China Architecture & Building Press,2018.
[6]	汤劲松,李梓亮,赵书银,等.盾构隧道施工因素对砌体结构房屋的影响[J]. 科学技术与工程,2021(13):5532-5538.Tang Jinsong,Li Ziliang,Zhao Shuyin,etc. Influence of Shield Tunnel Construction Factors on Masonry Structure House[J]. Science Technology and Engineering,2021(13):5532-5538.
[7]	JGJ 94—2008,建筑桩基技术规范[S]. JGJ 94—2008,Technical Code for Building Pile Foundations[S].