地铁盾构区间穿越砂层及下穿既有建筑物影响分析
|
摘要
以青岛地铁1号线汽车北站-流亭机场站盾构区间穿越软弱砂层及下穿建筑物为背景,分别建立两个数值模型进行模拟分析,并与监控量测结果进行比对,研究盾构施工引起围岩扰动的变形情况和既有建筑物的沉降情况。数值计算结果表明,盾构掘进过程中,两个模型的沉降峰值均发生在隧道拱顶正上方,各施工步序中,拱顶的下沉量大于地表沉降量和建筑物下沉量。监测数据表明,地表累计沉降的最大值发生在隧道左线和右线正上方,分别为-11. 9 mm、-13. 1 mm,建筑物累计沉降值为-13. 1 mm,符合安全控制标准。
This paper establishes two numerical models for simulation analysis based on a scenario of shielding tunneling section penetrating sand layer and undercrossing existing constructions from Qichebei Station to Qingdao Airport Station in Qingdao Metro Line 1.Results of the simulation have been made comparisons with the monitored measurements,and the deformation of surrounding rock disturbance caused by shield tunneling as well as the settlement of existing buildings are studied. And the results of numerical simulation further indicate that the peaks of settlement in both models occur directly above the tunnel vault and in each construction step, the settlement of tunnel vault is larger than the settlement of ground and existing constructions. The data monitored demonstrate that the maximum accumulative settlement of ground occurs directly above the left and right lines of the tunnel,which are -11. 9 mm and -13. 1 mm,respectively and the accumulative ground settlement of constructions is -13. 1 mm, which compliances with safety control standards.
This paper establishes two numerical models for simulation analysis based on a scenario of shielding tunneling section penetrating sand layer and undercrossing existing constructions from Qichebei Station to Qingdao Airport Station in Qingdao Metro Line 1.Results of the simulation have been made comparisons with the monitored measurements,and the deformation of surrounding rock disturbance caused by shield tunneling as well as the settlement of existing buildings are studied. And the results of numerical simulation further indicate that the peaks of settlement in both models occur directly above the tunnel vault and in each construction step, the settlement of tunnel vault is larger than the settlement of ground and existing constructions. The data monitored demonstrate that the maximum accumulative settlement of ground occurs directly above the left and right lines of the tunnel,which are -11. 9 mm and -13. 1 mm,respectively and the accumulative ground settlement of constructions is -13. 1 mm, which compliances with safety control standards.
引文
[1]韩冬.黄土地层地铁隧道施工引起地表移动及变形预测方法[D].西安:西安科技大学,2011.
[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]陈馈.盾构施工技术[M].北京:人民交通出版社,2009.
[4]Peck R B.Deep excavations and tunneling in soft ground[C].Proceedings of the 7th International Conference on Soil Mechanics and Foundation Engineering,1969:225-290.
[5]朱才辉,李宁.隧道施工诱发地表沉降估算方法及其规律分析[J].岩土力学,2016,37(S2):533-542.
[6]韩煊,刘赪炜.隧道下穿既有线的案例分析与沉降分析方法[J].土木工程学报,2012,45(1):134-141.
[7]李伟平,李兴,薛亚东,等.砂卵石地层浅埋盾构隧道开挖面稳定模型试验[J].岩土工程学报,2018,40(S2):199-203.
[8]潘茁.盾构施工全过程引起的土体扰动与分层沉降特性研究[D].北京:中国矿业大学,2016.
[9]王立新.湿陷性黄土地层与地铁结构相互作用机理及变形控制标准研究[D].西安:长安大学,2016.
[10]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(S2):3428-3439.
[11]青岛市地铁1号线工程勘察三标段汽车北站~流亭机场站区间岩土工程勘察报告[Z].青岛:青岛市勘察测绘研究院,2015.
[12]关宝树.隧道工程设计要点集[M].北京:人民交通出版社,2003.
[13]赵林,张君,周佳媚,等.盾构施工对地表建筑物位移的影响分析[J].铁道标准设计,2017,61(12):96-100.
[14]蔡美峰,何满朝,刘东燕.岩石力学与工程[M].北京:科学出版社,2002.
[15]朱泽奇,盛谦,周永强,等.隧洞围岩应力开挖扰动特征与规律研究[J].应用基础与工程科学学报,2015,23(2):349-558.
[16]胡瑞青,戴志仁,李储军,等.砂卵石地层基坑开挖对侧方地铁交叉隧道和车站的影响分析[J].铁道标准设计,2018,62(12):118-124.
[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]陈馈.盾构施工技术[M].北京:人民交通出版社,2009.
[4]Peck R B.Deep excavations and tunneling in soft ground[C].Proceedings of the 7th International Conference on Soil Mechanics and Foundation Engineering,1969:225-290.
[5]朱才辉,李宁.隧道施工诱发地表沉降估算方法及其规律分析[J].岩土力学,2016,37(S2):533-542.
[6]韩煊,刘赪炜.隧道下穿既有线的案例分析与沉降分析方法[J].土木工程学报,2012,45(1):134-141.
[7]李伟平,李兴,薛亚东,等.砂卵石地层浅埋盾构隧道开挖面稳定模型试验[J].岩土工程学报,2018,40(S2):199-203.
[8]潘茁.盾构施工全过程引起的土体扰动与分层沉降特性研究[D].北京:中国矿业大学,2016.
[9]王立新.湿陷性黄土地层与地铁结构相互作用机理及变形控制标准研究[D].西安:长安大学,2016.
[10]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(S2):3428-3439.
[11]青岛市地铁1号线工程勘察三标段汽车北站~流亭机场站区间岩土工程勘察报告[Z].青岛:青岛市勘察测绘研究院,2015.
[12]关宝树.隧道工程设计要点集[M].北京:人民交通出版社,2003.
[13]赵林,张君,周佳媚,等.盾构施工对地表建筑物位移的影响分析[J].铁道标准设计,2017,61(12):96-100.
[14]蔡美峰,何满朝,刘东燕.岩石力学与工程[M].北京:科学出版社,2002.
[15]朱泽奇,盛谦,周永强,等.隧洞围岩应力开挖扰动特征与规律研究[J].应用基础与工程科学学报,2015,23(2):349-558.
[16]胡瑞青,戴志仁,李储军,等.砂卵石地层基坑开挖对侧方地铁交叉隧道和车站的影响分析[J].铁道标准设计,2018,62(12):118-124.