砂卵石地层重叠盾构隧道掘进相互影响及控制措施研究

李雪; 张玉申; 王洋洋; 郭庆飞; 向乔; 龚子邦

doi:10.13204/j.gyjzG21063015

砂卵石地层重叠盾构隧道掘进相互影响及控制措施研究

doi: 10.13204/j.gyjzG21063015

1. 西南石油大学地球科学与技术学院, 成都 610500;
2. 成贵铁路有限责任公司, 成都 610500;
3. 中铁建大桥工程局集团第二工程有限公司, 广东深圳 518000

基金项目:

国家自然科学基金项目(51808469

四川省应用基础研究计划(22YYJC3133)。

52078213)

详细信息

作者简介:
李雪,男,1985年出生,博士,副教授,硕士生导师。

通讯作者:
张玉申,男,1995年出生,硕士研究生,zhyushe@163.com。

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- 文章访问数: 102
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- 被引次数: 0
出版历程
- 收稿日期: 2021-06-30

Study on Interplay of Overlapping Shield Tunnelling in Sandy Pebble Strata and Its Control Measures

1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China;
2. Chengdu-Guiyang Railway Co., Ltd., Chengdu 610500, China;
3. The 2nd Engineering Co., Ltd., China Railway Construction Bridge Engineering Bureau Group, Shenzhen 518000, China

摘要

摘要: 在重叠盾构隧道的掘进过程中,后掘进隧道施工会对先掘进隧道产生一定的影响,导致先掘进隧道结构发生变形,甚者影响结构安全,有必要对砂卵石地层重叠隧道掘进进行研究。以成都地铁6号线某区间重叠隧道为工程背景,首先对砂卵石地层重叠盾构隧道不同掘进模式进行分析,从地表沉降的角度分析选择先下后上为最优开挖方式,分析重叠隧道施工后导致地表沉降存在一定程度的叠加效应。为保证砂卵石地层重叠盾构隧道掘进过程的安全稳定,对隧道重叠区域注浆加固,增强隧道间土体的抗压、抗剪能力,最后通过实测数据与数值模拟结果相对比,误差均在5%以内;先掘进隧道地表沉降横向变化近似U形,后施工隧道掘进时地表沉降变化整体增加但趋于平缓,有着明显的"滞后性",注浆加固后土体变形得到控制。
- 砂卵石 /
- 重叠隧道 /
- 控制措施 /
- 现场监测
Abstract: In the tunneling process of overlapping shield tunnels, the construction of post tunnelling tunnels may have a certain influence on tunnels constructed first and cause structure deformation of the tunnels, even affect their safety. Therefore, it was necessary to study the tunnelling process of overlapping tunnels in sandy pebble strata. Based on the tunnel project of Chengdu Metro Line No.6, different tunnelling modes of overlapping shield tunnels in sandy pebble strata were analyzed, and the optimal tunnelling mode was selected from the perspective of subsidence of the earth’s surface. The superposition effect of subsidence caused by tunnelling of overlapping tunnels was analyzed. Grouting reinforcement between overlapping tunnels was performed to improve compressive and shear strength of soil between tunnels and ensure the safety and stability of shield tunnelling. Finally, by comparing the measured data with the numerical simulation results, the errors were all within 5%. The transverse subsidence of the earth’s surface above the tunnel constructed first was approximately U-shaped. Although the subsidence of the tunnel constructed first was still in evolution during the construction of post tunnelling tunnels, the changes tended to be stable and the subsidence was lagging obversely, soil deformation was under control after grouting reinforcement.
- sandy pebble /
- overlapping tunnel /
- control measure /
- field monitoring

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参考文献(24)

[1]	魏新江,张默爆,丁智,等.盾构穿越对既有地铁隧道影响研究现状与展望[J].岩土力学,2020(增刊2):1-20.
[2]	何川,封坤,方勇.盾构法修建地铁隧道的技术现状与展望[J].西南交通大学学报,2015,50(1):97-109.
[3]	JIN D L,YUAN D J,LIU S Y,et al.Performance of existing subway tunnels undercrossed by four closely spaced shield tunnels[J].Journal of Performance of Constructed Facilities,2019,33(1).https://ascelibrary.org/doi/abs/10.1061/(ASCE)CF.1943-5509.00.
[4]	台启民,张顶立,房倩,等.暗挖重叠地铁隧道地表变形特性分析[J].岩石力学与工程学报,2014,33(12):2472-2480.
[5]	娄平,李特.地铁叠线隧道盾构掘进对地表沉降影响研究[J].铁道工程学报,2020,37(9):66-71.
[6]	杨成永,马文辉,彭华,等.地铁双线盾构近距下穿盾构隧道施工沉降控制[J].铁道工程学报,2018,35(7):91-98.
[7]	张晓清,张孟喜,李林,等.多线叠交盾构隧道近距离穿越施工扰动机制研究[J].岩土力学,2017,38(4):1133-1140.
[8]	金大龙.盾构隧道群下穿既有地铁运营隧道变形机理及控制研究[D].北京:北京交通大学,2018.
[9]	可文海,管凌霄,刘东海,等.盾构隧道下穿管道施工引起的管-土相互作用研究[J].岩土力学,2020,41(1):221-228 ,234.
[10]	谢雄耀,牛俊涛,杨国伟,等.重叠隧道盾构施工对先建隧道影响模型试验研究[J].岩石力学与工程学报,2013,32(10):2061-2069.
[11]	CHEHADE F H,SHAHROUR I.Numerical analysis of the interaction between twin-tunnels:influence of the relative position and construction procedure[J].Tunnelling and Underground Space Technology,2008,23(2):210-214.
[12]	ZHONG Z,LI C,LIU X,et al.Analysis of ground surface settlement induced by the construction of mechanized twin tunnels in soil-rock mass mixed ground[J].Tunnelling and Underground Space Technology,2021,110(1).https://doi.org/10.1016/j.tust.2020.103746.
[13]	LIANG R,XIA T,HONG Y,et al.Effects of above-crossing tunnelling on the existing shield tunnels[J].Tunnelling and Underground Space Technology,2016,58(9):159-176.
[14]	ZHANG Z,HUANG M.Geotechnical influence on existing subway tunnels induced by multiline tunneling in shanghai soft soil[J].Computers& Geotechnics,2014,56(3):121-132.
[15]	LIANG R Z,KANG C,XIANG L M,et al.Responses of in-service shield tunnel to overcrossing tunnelling in soft ground[J].Environmental Earth Sciences,2021,80(5).https://doi.org/10.1007/s12665-021-09374-3.
[16]	梁荣柱,宗梦繁,康成,等.考虑隧道剪切效应的隧道下穿对既有盾构隧道的纵向影响[J].浙江大学学报(工学版),2018,52(3):420-430,472.
[17]	ZHANG Z,ZHANG M,ZHAO Q,et al.Interaction analyses between existing pipeline and quasi-rectangular tunneling in clays[J].KSCE Journal of Civil Engineering,2020,25(2):1-19.
[18]	张治国,张孟喜.软土城区土压平衡盾构上下交叠穿越地铁隧道的变形预测及施工控制[J].岩石力学与工程学报,2013,32(增刊2):3428-3439.
[19]	李磊,张孟喜,吴惠明,等.近距离多线叠交盾构施工对既有隧道变形的影响研究[J].岩土工程学报,2014,36(6):1036-1043.
[20]	冯慧君,俞然刚.双线隧道盾构掘进对地表沉降影响的数值分析[J].铁道工程学报,2019,36(3):78-83.
[21]	易宏伟.盾构法施工对土体扰动和地层移动影响的研究[D].上海:同济大学,1999.
[22]	张云,殷宗泽,徐永福.盾构法隧道引起的地表变形分析[J].岩石力学与工程学报,2002,21(3):388-392.
[23]	卢健,姚爱军,郑轩,等.地铁双线隧道开挖地表沉降规律及计算方法研究[J].岩石力学与工程学报,2019,38(增刊2):3735-3747.
[24]	LI X G,YUAN D J.Response of a double-decked metro tunnel to shield driving of twin closely under-crossing tunnels[J].Tunnelling and Underground Space Technology,2012,28:18-30.