地面堆载对地铁盾构隧道变形影响规律研究
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摘要
文章以上海某地铁区间段施工前堆土的盾构隧道为工程背景,对隧道收敛变形的现场监测数据进行分析,并建立数值计算模型对从隧道施工前的堆载到施工完成后的卸载全过程进行模拟。结果表明:隧道施工前的地面堆载对隧道变形具有显著影响,隧道线开挖的先后顺序也会对隧道变形造成影响;采用弹簧单元模拟管片连接,能够更加真实地反映隧道管片受力变形特点,与实测结果较为相符。
Based on the shield tunnel with ground-surcharge before construction of a subway section in Shanghai,the field monitoring data of the tunnel convergence deformation are analyzed, and the numerical model is established to simulate the whole process from overloading before construction to unloading after construction. The results show that the ground-surcharge before the tunnel construction has significant influence on tunnel deformation, and the sequence of the tunnel excavation will also affect the deformation of the tunnel. The spring element, which is used to simulate the segment connection, can reflect the stress and deformation characteristics of tunnel segments more realistically, and it is more consistent with the measured results.
Based on the shield tunnel with ground-surcharge before construction of a subway section in Shanghai,the field monitoring data of the tunnel convergence deformation are analyzed, and the numerical model is established to simulate the whole process from overloading before construction to unloading after construction. The results show that the ground-surcharge before the tunnel construction has significant influence on tunnel deformation, and the sequence of the tunnel excavation will also affect the deformation of the tunnel. The spring element, which is used to simulate the segment connection, can reflect the stress and deformation characteristics of tunnel segments more realistically, and it is more consistent with the measured results.
引文
[1]孙钧.城市地下工程活动的环境土工学问题(下)[J].地下工程与隧道,2000,(1):2-7.SUN Jun. Environmental Geotechnical Problems of Urban Underground Engineering Activities(Ⅱ)[J]. Underground Engineering and Tunnels,2000,(1):2-7.
[2]杨雨冰,周彪,谢雄耀.邻近基坑施工作用下盾构隧道横向变形及开裂特性研究[J].岩石力学与工程学报,2016,(S2):4082-4093.YANG Yubing, ZHOU Biao, XIE Xiongyao. Study on Transverse Deformation and Cracking Property of Shield-driven Tunnel Induced by Adjacent Excavation[J]. Chinese Journal of Rock Mechanics and Engineering,2016,(S2):4082-4093.
[3]王如路.上海软土地铁隧道变形影响因素及变形特征分析[J].地下工程与隧道,2009,(1):1-6.WANG Rulu. Factors Influencing Deformation of Shanghai Soft Soil Metro Tunnel and Deformation Analysis[J]. Underground Engineering and Tunnels,2009,(1):1-6.
[4]李春良,王国强,赵凯军,等.地面荷载作用盾构隧道纵向力学行为[J].吉林大学学报(工学版),2011,(S2):180-184.LI Chunliang, WANG Guoqiang, ZHAO Kaijun,et al. Vertical Mechanical Behavior on Shield Tunnel under Loads on Ground Surface[J]. Journal of Jilin University(Engineering and Technology Edition),2011,(S2):180-184.
[5]魏新江,洪文强,魏纲,等.堆载引起临近地铁隧道的转动与错台变形计算[J].岩石力学与工程学报,2018,(5):1281-1289.WEI Xinjiang, HONG Wenqiang, WEI Gang,et al. Rotation and Shearing Dislocation Deformation of Subway Tunnels Due to Adjacent Ground Stack Load[J]. Chinese Journal of Rock Mechanics and Engineering, 2018,(5):1281-1289.
[6]黄大维,周顺华,王秀志,等.模型盾构隧道管片纵缝接头设计方法[J].岩土工程学报,2015,(6):1068-1076.HUANG Dawei,ZHOU Shunhua,WANG Xiuzhi,et al. Design Method for Longitudinal Segment Joints of Shield Tunnel Model[J].Chinese Journal of Geotechnical Engineering,2015,(6):1068-1076.
[7]姜启元,管攀峰,叶蓉.软土盾构隧道的纵向变形分析[J].地下工程与隧道,1999,(4):2-6.JIANG Qiyuan,GUAN Panfeng,YE Rong. Analysis of Longitudinal Deformation of Shield Tunnel in Soft Soil[J]. Underground Engineering and Tunnels, 1999,(4):2-6.
[8]张明告,周顺华,黄大维,等.地表超载对地铁盾构隧道的影响分析[J].岩土力学,2016,(8):2271-2278.ZHANG Minggao,ZHOU Shunhua,HUANG Dawei,et al. Analysis of Influence of Surface Surchare on Subway Shield Tunnel under[J]. Rock and Soil Mechanics,2016,(8):2271-2278.
[9]柳献,张浩立,鲁亮,等.超载工况下盾构隧道结构承载能力的试验研究[J].地下工程与隧道,2013,(4):10-15.LIU Xian, ZHANG Haoli,LU Liang, et al. Experimental Study on Bearing Capacity of Shield Tunnel under Overload Condition[J].Underground Engineering and Tunnels,2013,(4):10-15.
[10]孙廉威,秦建设,洪义,等.地面堆载下盾构隧道管片与环缝接头的性状分析[J].浙江大学学报(工学版),2017,(8):1509-1518.SUN Lianwei, QIN Jianshe, HONG Yi, et al. Shield Tunnel Segment and Circumferential Joint Performance under Surface Surcharge[J]. Journal of Zhejiang University(Engineering Science),2017,(8):1509-1518.
[11]孙廉威.外界荷载作用下已建盾构隧道结构性状[D].杭州:浙江大学,2016.SUN Lianwei. Shield Tunnel Structure Behavior under External Load[D]. Hangzhou:Zhejiang University,2016.
[12]吴庆.地面堆载对既有盾构隧道结构的影响研究[D].上海:上海交通大学,2012.WU Qing. Research on Influence of Shield Tunnel Structure on Ground Heaped Load[D]. Shanghai:Shanghai Jiaotong University,2012.
[13]王如路,张冬梅.超载作用下软土盾构隧道横向变形机理及控制指标研究[J].岩土工程学报,2013,(6):1092-1101.WANG Rulu,ZHANG Dongmei. Evolution of Transverse Deformation and Assessment Index for Operation Shield Tunnel under Surface Surcharge in Soft Clay[J]. Chinese Journal of Geotechnical Engineering,2013,(6):1092-1101.
[2]杨雨冰,周彪,谢雄耀.邻近基坑施工作用下盾构隧道横向变形及开裂特性研究[J].岩石力学与工程学报,2016,(S2):4082-4093.YANG Yubing, ZHOU Biao, XIE Xiongyao. Study on Transverse Deformation and Cracking Property of Shield-driven Tunnel Induced by Adjacent Excavation[J]. Chinese Journal of Rock Mechanics and Engineering,2016,(S2):4082-4093.
[3]王如路.上海软土地铁隧道变形影响因素及变形特征分析[J].地下工程与隧道,2009,(1):1-6.WANG Rulu. Factors Influencing Deformation of Shanghai Soft Soil Metro Tunnel and Deformation Analysis[J]. Underground Engineering and Tunnels,2009,(1):1-6.
[4]李春良,王国强,赵凯军,等.地面荷载作用盾构隧道纵向力学行为[J].吉林大学学报(工学版),2011,(S2):180-184.LI Chunliang, WANG Guoqiang, ZHAO Kaijun,et al. Vertical Mechanical Behavior on Shield Tunnel under Loads on Ground Surface[J]. Journal of Jilin University(Engineering and Technology Edition),2011,(S2):180-184.
[5]魏新江,洪文强,魏纲,等.堆载引起临近地铁隧道的转动与错台变形计算[J].岩石力学与工程学报,2018,(5):1281-1289.WEI Xinjiang, HONG Wenqiang, WEI Gang,et al. Rotation and Shearing Dislocation Deformation of Subway Tunnels Due to Adjacent Ground Stack Load[J]. Chinese Journal of Rock Mechanics and Engineering, 2018,(5):1281-1289.
[6]黄大维,周顺华,王秀志,等.模型盾构隧道管片纵缝接头设计方法[J].岩土工程学报,2015,(6):1068-1076.HUANG Dawei,ZHOU Shunhua,WANG Xiuzhi,et al. Design Method for Longitudinal Segment Joints of Shield Tunnel Model[J].Chinese Journal of Geotechnical Engineering,2015,(6):1068-1076.
[7]姜启元,管攀峰,叶蓉.软土盾构隧道的纵向变形分析[J].地下工程与隧道,1999,(4):2-6.JIANG Qiyuan,GUAN Panfeng,YE Rong. Analysis of Longitudinal Deformation of Shield Tunnel in Soft Soil[J]. Underground Engineering and Tunnels, 1999,(4):2-6.
[8]张明告,周顺华,黄大维,等.地表超载对地铁盾构隧道的影响分析[J].岩土力学,2016,(8):2271-2278.ZHANG Minggao,ZHOU Shunhua,HUANG Dawei,et al. Analysis of Influence of Surface Surchare on Subway Shield Tunnel under[J]. Rock and Soil Mechanics,2016,(8):2271-2278.
[9]柳献,张浩立,鲁亮,等.超载工况下盾构隧道结构承载能力的试验研究[J].地下工程与隧道,2013,(4):10-15.LIU Xian, ZHANG Haoli,LU Liang, et al. Experimental Study on Bearing Capacity of Shield Tunnel under Overload Condition[J].Underground Engineering and Tunnels,2013,(4):10-15.
[10]孙廉威,秦建设,洪义,等.地面堆载下盾构隧道管片与环缝接头的性状分析[J].浙江大学学报(工学版),2017,(8):1509-1518.SUN Lianwei, QIN Jianshe, HONG Yi, et al. Shield Tunnel Segment and Circumferential Joint Performance under Surface Surcharge[J]. Journal of Zhejiang University(Engineering Science),2017,(8):1509-1518.
[11]孙廉威.外界荷载作用下已建盾构隧道结构性状[D].杭州:浙江大学,2016.SUN Lianwei. Shield Tunnel Structure Behavior under External Load[D]. Hangzhou:Zhejiang University,2016.
[12]吴庆.地面堆载对既有盾构隧道结构的影响研究[D].上海:上海交通大学,2012.WU Qing. Research on Influence of Shield Tunnel Structure on Ground Heaped Load[D]. Shanghai:Shanghai Jiaotong University,2012.
[13]王如路,张冬梅.超载作用下软土盾构隧道横向变形机理及控制指标研究[J].岩土工程学报,2013,(6):1092-1101.WANG Rulu,ZHANG Dongmei. Evolution of Transverse Deformation and Assessment Index for Operation Shield Tunnel under Surface Surcharge in Soft Clay[J]. Chinese Journal of Geotechnical Engineering,2013,(6):1092-1101.