盾构地表沉降的数值分析及归一化模型建立
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摘要
采用ABAQUS有限元分析软件,建立三维弹塑性模型,分析了不同隧道埋深H、直径D、土体弹性模量E、应力释放率P、静止侧压力系数K_0条件下,盾构开挖对地表变形的影响。通过灰色关联分析,建立了各因素与地表沉降关系。综合考虑各种因素影响,采用归一化处理方法,建立了由于盾构施工导致地表沉降计算公式。分析表明,盾构施工过程中,不同因素与地面沉降关联强弱不同,由大到小依次为K_0>H>D>P>E,即静止侧压力系数K_0对地面沉降最为敏感。应用建立的归一化地表沉降计算公式,对实际盾构施工引起地层位移进行了计算,结果与实测地表沉降规律一致,可供类似工程参考。
Based on ABAQUS program,a 3-D finite element analysis model was established to simulate the effects of tunnel excavation on surface displacement by considering different depths of embedment,diameters,elastic modulus of soil,stress release rates,and static lateral pressure coefficients. The grey relation between each factor with surface settlement was determined. On the basis of the above work,a formula for ground surface settlement by shield tunneling was proposed by normalized processing method. The analyzed results show that the connection level between different factors and surface displacement different. The levels from the strongest to weakest K_0>H>D>P>E,means static lateral pressure coefficient is the most sensitive to surface displacement. The proposed formula for ground surface settlement which can fit well with monitoring values of practical surface displacement provides valuable reference for similar engineering.
Based on ABAQUS program,a 3-D finite element analysis model was established to simulate the effects of tunnel excavation on surface displacement by considering different depths of embedment,diameters,elastic modulus of soil,stress release rates,and static lateral pressure coefficients. The grey relation between each factor with surface settlement was determined. On the basis of the above work,a formula for ground surface settlement by shield tunneling was proposed by normalized processing method. The analyzed results show that the connection level between different factors and surface displacement different. The levels from the strongest to weakest K_0>H>D>P>E,means static lateral pressure coefficient is the most sensitive to surface displacement. The proposed formula for ground surface settlement which can fit well with monitoring values of practical surface displacement provides valuable reference for similar engineering.
引文
[1]张稳军,金明明,张高乐,等.双洞单线盾构隧道穿湖施工引起的地层沉降分析[J].土木工程学报,2015,48(增2):293-297.(Zhang Wenjun,Jin Mingming,Zhang Gaole,et al.Analysis on stratum settlement induced by construction for double-tube single-track shield tunnels passing under the lake[J].China Civil Engineering Journal,2015,48(Supp.2):293-297.(in Chinese))
[2]郭玉海.大直径土压平衡盾构引起的地表变形规律研究[J].土木工程学报,2013,46(11):128-137.(Guo Yuhai.Study on ground surface movement induced by large-diameter earth pressure balance shield tunneling[J].China Civil Engineering Journal,2013,46(11):128-137.(in Chinese))
[3]王建秀,付慧仙,朱雁飞,等.基于地层损失的盾构沉降计算方法研究进展[J].地下空间与工程学报,2010,6(1):112-119.(Wang Jianxiu,Fu Huixian,Zhu Yanfei,et al.Advance in calculation of subsidence caused by shield tunnel based on strata loss[J].Chinese Journal of Underground Space and Engineering,2010,6(1):112-119.(in Chinese))
[4]林存刚,张忠苗,吴世明,等.泥水盾构掘进参数对地面沉降影响实例研究[J].土木工程学报,2012,45(4):116-126.(Lin Cungang,Zhang Zhongmiao,Wu Shiming,et al.Case study of slurry shield driving parameters influences on ground surface settlements[J].China Civil Engineering Journal,2012,45(4):116-126.(in Chinese))
[5]林存刚,刘干斌,吴世明,等.泥水盾构掘进引起的地面沉降---传统计算理论的评析与修正[J].土木工程学报,2015,48(4):111-123.(Lin Cungang,Liu Ganbin,Wu Shiming,et al.Land-surface subsidence induced by slurry shield tunnelingduced by slurry shield ving parameters influealculation methods[J].China Civil Engineering Journal,2015,48(4):111-123.(in Chinese))
[6]马险峰,王俊淞,李削云,等.盾构隧道引起地层损失和地表沉降的离心模型试验研究[J].岩土工程学报,2012,34(5):942-947.(Ma Xianfeng,Wang Junsong,Li Xiaoyun,et al.Centrifuge modeling of ground loss and settlement caused by shield tunnelling in soft ground[J].Chinese Journal of Geotechnical Engineering,2012,34(5):942-947.(in Chinese))
[7]王建秀,田普卓,付慧仙,等.基于地层损失的盾构隧道地面沉降控制[J].地下空间与工程学报,2012,8(3):569-576.(Wang Jianxiu,Tian Puzhuo,Fu Huixian,et al.Ground settlement controlling of shield tunnel by strata loss theory[J].Chinese Journal of Underground Space and Engineering,2012,8(3):569-576.(in Chinese))
[8]张海波,殷宗泽,朱俊高.地铁隧道盾构法施工过程中地层变位的三维有限元模拟[J].岩石力学与工程学报,2005,24(5):755-760.(Zhang Haibo,Yin Zongze,Zhu Jungao.3-D finite element simulation on deformation of soil mass during shield tunneling[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(5):755-760.(in Chinese))
[9]肖立,张庆贺.铁路轨道下盾构施工所致地面沉降的数值模拟[J].同济大学学报(自然科学版),2011,39(9):1286-1291.(Xiao Li,Zhang Qinghe.3-Dnumerical modeling of ground settlements caused by shield tunneling across multi-tracks of railway[J].Journal of Tongji University(Natural Science Edition),2011,39(9):1286-1291.(in Chinese))
[10]王国才,马达君,杨阳,等.软土地层中地铁盾构施工引起地表沉降的三维有限元分析[J].岩土工程学报,2011,33(9):1286-1291.(Wang Guocai,Ma Dajun,Yang Yang,et al.3-D finite element analysis of ground settlement caused by shield construction of metro tunnels in soft soils[J].Chinese Journal of Geotechnical Engineering,2011,33(9):1286-1291.(in Chinese))
[11]胡冬,张小平.基于灰色系统理论的基坑变形预测研究[J].地下空间与工程学报,2009,5(1):74-78,168.(Hu Dong,Zhang Xiaoping.Research on predicting deformation of foundation pit based on grey system theory[J].Chinese Journal of Underground Space and Engineering,2009,5(1):74-78,168.(in Chinese))
[12]Peck R B.Deep excavation and tunneling in soft ground[A]∥Proceeding of the 7th International Conference on Soil Mechanics and Foundation Engineering Mexico City[C].1969:255-290.
[2]郭玉海.大直径土压平衡盾构引起的地表变形规律研究[J].土木工程学报,2013,46(11):128-137.(Guo Yuhai.Study on ground surface movement induced by large-diameter earth pressure balance shield tunneling[J].China Civil Engineering Journal,2013,46(11):128-137.(in Chinese))
[3]王建秀,付慧仙,朱雁飞,等.基于地层损失的盾构沉降计算方法研究进展[J].地下空间与工程学报,2010,6(1):112-119.(Wang Jianxiu,Fu Huixian,Zhu Yanfei,et al.Advance in calculation of subsidence caused by shield tunnel based on strata loss[J].Chinese Journal of Underground Space and Engineering,2010,6(1):112-119.(in Chinese))
[4]林存刚,张忠苗,吴世明,等.泥水盾构掘进参数对地面沉降影响实例研究[J].土木工程学报,2012,45(4):116-126.(Lin Cungang,Zhang Zhongmiao,Wu Shiming,et al.Case study of slurry shield driving parameters influences on ground surface settlements[J].China Civil Engineering Journal,2012,45(4):116-126.(in Chinese))
[5]林存刚,刘干斌,吴世明,等.泥水盾构掘进引起的地面沉降---传统计算理论的评析与修正[J].土木工程学报,2015,48(4):111-123.(Lin Cungang,Liu Ganbin,Wu Shiming,et al.Land-surface subsidence induced by slurry shield tunnelingduced by slurry shield ving parameters influealculation methods[J].China Civil Engineering Journal,2015,48(4):111-123.(in Chinese))
[6]马险峰,王俊淞,李削云,等.盾构隧道引起地层损失和地表沉降的离心模型试验研究[J].岩土工程学报,2012,34(5):942-947.(Ma Xianfeng,Wang Junsong,Li Xiaoyun,et al.Centrifuge modeling of ground loss and settlement caused by shield tunnelling in soft ground[J].Chinese Journal of Geotechnical Engineering,2012,34(5):942-947.(in Chinese))
[7]王建秀,田普卓,付慧仙,等.基于地层损失的盾构隧道地面沉降控制[J].地下空间与工程学报,2012,8(3):569-576.(Wang Jianxiu,Tian Puzhuo,Fu Huixian,et al.Ground settlement controlling of shield tunnel by strata loss theory[J].Chinese Journal of Underground Space and Engineering,2012,8(3):569-576.(in Chinese))
[8]张海波,殷宗泽,朱俊高.地铁隧道盾构法施工过程中地层变位的三维有限元模拟[J].岩石力学与工程学报,2005,24(5):755-760.(Zhang Haibo,Yin Zongze,Zhu Jungao.3-D finite element simulation on deformation of soil mass during shield tunneling[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(5):755-760.(in Chinese))
[9]肖立,张庆贺.铁路轨道下盾构施工所致地面沉降的数值模拟[J].同济大学学报(自然科学版),2011,39(9):1286-1291.(Xiao Li,Zhang Qinghe.3-Dnumerical modeling of ground settlements caused by shield tunneling across multi-tracks of railway[J].Journal of Tongji University(Natural Science Edition),2011,39(9):1286-1291.(in Chinese))
[10]王国才,马达君,杨阳,等.软土地层中地铁盾构施工引起地表沉降的三维有限元分析[J].岩土工程学报,2011,33(9):1286-1291.(Wang Guocai,Ma Dajun,Yang Yang,et al.3-D finite element analysis of ground settlement caused by shield construction of metro tunnels in soft soils[J].Chinese Journal of Geotechnical Engineering,2011,33(9):1286-1291.(in Chinese))
[11]胡冬,张小平.基于灰色系统理论的基坑变形预测研究[J].地下空间与工程学报,2009,5(1):74-78,168.(Hu Dong,Zhang Xiaoping.Research on predicting deformation of foundation pit based on grey system theory[J].Chinese Journal of Underground Space and Engineering,2009,5(1):74-78,168.(in Chinese))
[12]Peck R B.Deep excavation and tunneling in soft ground[A]∥Proceeding of the 7th International Conference on Soil Mechanics and Foundation Engineering Mexico City[C].1969:255-290.