土岩复合地层盾构掘进对桥梁变形影响分析
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摘要
依托深圳地铁11号线宝安—碧海湾区间盾构穿越桥梁桩基工程,采用FLAC3D有限差分软件研究土岩复合地层盾构近距离掘进对桥梁桩基础、桥面的变形影响规律及影响范围,并与实测结果进行对比。结果表明:隧道施工对周围地层的影响可划分为塑性破坏区、弹性区和无影响区3个区域;盾构隧道掘进引起的桥面沉降较大,盾构对桥面变形的影响范围为盾构掘进面距桥面为-5D～4D;位于2条隧道之间的桥梁桩基受到2条隧道的影响,桩身竖向位移较大,且最大竖向位移位于桩顶;位于隧道侧方的桩基,盾构施工引起的X方向水平位移值较大,且施工对其影响范围也更大,具有一定的滞后性。
Relying on the bridge pile foundation engineering of Baoan-Bihaiwan shield tunnel of Shenzhen Metro Line 11,FLAC3D software is used to research the influence rule and influence scope of the deformation of the bridge pile foundation and the bridge deck caused by shield tunneling from close range in Soil-rock compound strata,and the research is compared with the measured results. The results show that: The influence of tunnel construction on the surrounding strata can be divided into three areas: plastic failure zone,elastic zone and non-affected zone. Bridge deck settlement caused by Shield tunnel construction is larger,the influence scope of shield on bridge deck deformation is -5D to 4D from Shield tunnel excavation face to bridge deck; the bridge pile foundation between the two tunnels is under the influence of two tunnels,and the vertical displacement of the pile body is larger; the maximum vertical displacement is located at the top of pile; for the pile foundation located in the tunnel side,the horizontal displacement value in X direction is bigger,and the influence scope is wider caused by shield construction;and the influence has certain hysteresis.
Relying on the bridge pile foundation engineering of Baoan-Bihaiwan shield tunnel of Shenzhen Metro Line 11,FLAC3D software is used to research the influence rule and influence scope of the deformation of the bridge pile foundation and the bridge deck caused by shield tunneling from close range in Soil-rock compound strata,and the research is compared with the measured results. The results show that: The influence of tunnel construction on the surrounding strata can be divided into three areas: plastic failure zone,elastic zone and non-affected zone. Bridge deck settlement caused by Shield tunnel construction is larger,the influence scope of shield on bridge deck deformation is -5D to 4D from Shield tunnel excavation face to bridge deck; the bridge pile foundation between the two tunnels is under the influence of two tunnels,and the vertical displacement of the pile body is larger; the maximum vertical displacement is located at the top of pile; for the pile foundation located in the tunnel side,the horizontal displacement value in X direction is bigger,and the influence scope is wider caused by shield construction;and the influence has certain hysteresis.
引文
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[3]Lee K M,Rowe R K.Finite element modeling of the three-dimensional ground deformations due to tunneling in soft cohesive soil.Part II-Results[J].Computers and Geotechnics,1990,10(2):111-135.
[4]孙庆,杨敏,冉侠,等.隧道掘进对周围土体及桩基影响的试验研究[J].同济大学学报(自然科学版),2011,39(7):989-993.(Sun Qing,Yang Min,Ran Xia,et al.Test study on tunnelling-induced soil movements and pile responses[J].Journal of Tongji University(Natural Science Edition),2011,39(7):989-993.(in Chinese))
[5]Loganathan N,Poulos H G,Stewart D P.Centrifuge model testing of tunneling-induced ground and pile deformations[J].Géotechnique,2000,50(3):283-294.
[6]Chen L T,Poulos H G,Lognaathan N.Pile responses caused by tunneling[J].Joumal of Geotechnical and Geoenvironmental Engineering,1999,125(3):207-215.
[7]李早,黄茂松.隧道掘进对群桩竖向位移和内力影响分析[J].岩土工程学报,2007,29(3):398-402.(Li Zao,Huang Maosong.Analysis of settlement and internal forces of group pile due to tunneling[J].Chinese Journal of Geotechnical Engineering,2007,29(3):398-402.(in Chinese))
[8]彭坤,陶连金,高玉春,等.盾构隧道下穿桥梁引起桩基变位的数值分析[J].地下空间与工程学报,2012,8(3):485-489.(Peng Kun,Tao Lianjin,Gao Yuchun,et al.Numerical analysis of bridge pile deformation caused by shield tunnel construction underneath[J].Chinese Journal of Underground Space and Engineering,2012,8(3):485-489.(in Chinese))
[9]徐长节,陈其志,任凌云.软土地区地铁盾构穿越对城市立交桥的影响分析[J].地下空间与工程学报,2016,12(3):769-775.(Xu Changjie,Chen Qizhi,Ren Lingyun.Influence of shield crossing tunnels in soft soil area on city overpass[J].Chinese Journal of Underground Space and Engineering,2016,12(3):769-775.(in Chinese))
[10]张恒,陈寿根,邓稀肥.盾构法施工对地表及桥梁桩基的影响分析[J].地下空间与工程学报,2011,7(3):552-557.(Zhang Heng,Chen Shougen,Deng Xifei.Analysis on influence of shield tunneling on ground and bridge pile[J].Chinese Journal of Underground Space and Engineering,2011,7(3):552-557.(in Chinese))
[11]Loganathan N,Poulos H G,Xu K J.Ground and pileground respond due to tunneling[J].Soils and Foundations,2005,41(1):57-67.
[12]Gordon T K,Lee,Ng C W W.Effects of advancing open face tunneling on an existing loaded pile[J].Journal of Geotechnical and Geoenvironmental Engineering,2005,131(2):193-201.
[13]朱逢斌.地铁隧道掘进对原有桩基工作性状的影响研究[D].南京:南京林业大学,2007.(Zhu Fengbin.Study on the impact of tunneling on the behaviors of adjacent existing piles[D].Nanjing:Nanjing Forestry University,2007.(in Chinese))
[14]黄飞.地铁盾构法施工对邻近桩基础的影响分析[D].广州:广州大学,2012.(Huang Fei.Analysis of the influence of subway shield tunneling on adjacent pile foundation[D].Guangzhou:Guangzhou University,2012.(in Chinese))
[15]丁鹏华.盾构隧道施工地层移动对临近桥梁桩基的影响研究[D].北京:北京交通大学,2015.(Ding Penghua.Effects of ground movements during shield tunneling on adjacent pile foundations[D].Beijing:Beijing Jiaotong University,2015.(in Chinese))
[16]周正宇.地铁邻近既有桥梁施工影响分析及主动防护研究[D].北京:北京交通大学,2012.(Zhou Zhengyu.Research on effect and the active protection of neighboring existing bridge with subway construction[D].Beijing:Beijing Jiaotong University,2012.(in Chinese))
[17]朱逢斌,杨平,林水仙.盾构隧道施工对邻近承载桩基影响研究[J].岩土力学,2010,31(12):3894-3900.(Zhu Fengbin,Yang Ping,Lin Shuixian.Study of influence of shield tunneling on neighboring loaded piles[J].Rock and Soil Mechanics,2010,31(12):3894-3900.(in Chinese))
[2]Lee K M,Rowe R K.Finite element modeling of the three-dimensional ground deformations due to tunlleling in soft cohesive soil:Part I-Methods of analysis[J].Computers and Geoteehnics,1990,10(2):87-110.
[3]Lee K M,Rowe R K.Finite element modeling of the three-dimensional ground deformations due to tunneling in soft cohesive soil.Part II-Results[J].Computers and Geotechnics,1990,10(2):111-135.
[4]孙庆,杨敏,冉侠,等.隧道掘进对周围土体及桩基影响的试验研究[J].同济大学学报(自然科学版),2011,39(7):989-993.(Sun Qing,Yang Min,Ran Xia,et al.Test study on tunnelling-induced soil movements and pile responses[J].Journal of Tongji University(Natural Science Edition),2011,39(7):989-993.(in Chinese))
[5]Loganathan N,Poulos H G,Stewart D P.Centrifuge model testing of tunneling-induced ground and pile deformations[J].Géotechnique,2000,50(3):283-294.
[6]Chen L T,Poulos H G,Lognaathan N.Pile responses caused by tunneling[J].Joumal of Geotechnical and Geoenvironmental Engineering,1999,125(3):207-215.
[7]李早,黄茂松.隧道掘进对群桩竖向位移和内力影响分析[J].岩土工程学报,2007,29(3):398-402.(Li Zao,Huang Maosong.Analysis of settlement and internal forces of group pile due to tunneling[J].Chinese Journal of Geotechnical Engineering,2007,29(3):398-402.(in Chinese))
[8]彭坤,陶连金,高玉春,等.盾构隧道下穿桥梁引起桩基变位的数值分析[J].地下空间与工程学报,2012,8(3):485-489.(Peng Kun,Tao Lianjin,Gao Yuchun,et al.Numerical analysis of bridge pile deformation caused by shield tunnel construction underneath[J].Chinese Journal of Underground Space and Engineering,2012,8(3):485-489.(in Chinese))
[9]徐长节,陈其志,任凌云.软土地区地铁盾构穿越对城市立交桥的影响分析[J].地下空间与工程学报,2016,12(3):769-775.(Xu Changjie,Chen Qizhi,Ren Lingyun.Influence of shield crossing tunnels in soft soil area on city overpass[J].Chinese Journal of Underground Space and Engineering,2016,12(3):769-775.(in Chinese))
[10]张恒,陈寿根,邓稀肥.盾构法施工对地表及桥梁桩基的影响分析[J].地下空间与工程学报,2011,7(3):552-557.(Zhang Heng,Chen Shougen,Deng Xifei.Analysis on influence of shield tunneling on ground and bridge pile[J].Chinese Journal of Underground Space and Engineering,2011,7(3):552-557.(in Chinese))
[11]Loganathan N,Poulos H G,Xu K J.Ground and pileground respond due to tunneling[J].Soils and Foundations,2005,41(1):57-67.
[12]Gordon T K,Lee,Ng C W W.Effects of advancing open face tunneling on an existing loaded pile[J].Journal of Geotechnical and Geoenvironmental Engineering,2005,131(2):193-201.
[13]朱逢斌.地铁隧道掘进对原有桩基工作性状的影响研究[D].南京:南京林业大学,2007.(Zhu Fengbin.Study on the impact of tunneling on the behaviors of adjacent existing piles[D].Nanjing:Nanjing Forestry University,2007.(in Chinese))
[14]黄飞.地铁盾构法施工对邻近桩基础的影响分析[D].广州:广州大学,2012.(Huang Fei.Analysis of the influence of subway shield tunneling on adjacent pile foundation[D].Guangzhou:Guangzhou University,2012.(in Chinese))
[15]丁鹏华.盾构隧道施工地层移动对临近桥梁桩基的影响研究[D].北京:北京交通大学,2015.(Ding Penghua.Effects of ground movements during shield tunneling on adjacent pile foundations[D].Beijing:Beijing Jiaotong University,2015.(in Chinese))
[16]周正宇.地铁邻近既有桥梁施工影响分析及主动防护研究[D].北京:北京交通大学,2012.(Zhou Zhengyu.Research on effect and the active protection of neighboring existing bridge with subway construction[D].Beijing:Beijing Jiaotong University,2012.(in Chinese))
[17]朱逢斌,杨平,林水仙.盾构隧道施工对邻近承载桩基影响研究[J].岩土力学,2010,31(12):3894-3900.(Zhu Fengbin,Yang Ping,Lin Shuixian.Study of influence of shield tunneling on neighboring loaded piles[J].Rock and Soil Mechanics,2010,31(12):3894-3900.(in Chinese))
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