成都盾构隧道开挖引起的地表沉降
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- 英文论文题名：Ground Settlement Caused by Shield Tunnelling in Chengdu
- 论文作者：李泰澧 ; 周帅 ; 张千里
- 英文论文作者：LI Taifeng ; ZHUO Shuai ; ZHANG Qianli ; China Academy of Railway Sciences ; China Railway Southwest Research Institute Co. ; Ltd. ; Railway Engineering Research Institute ; China Academy of Railway Sciences
- 年：2016
- 作者机构：中国铁道科学研究院;中铁西南科学研究院有限公司;中国铁道科学研究院铁道建筑研究所;
- 论文关键词：隧道开挖 ; 地表沉降 ; 经验公式 ; 数值模拟 ; 公式修正
- 英文论文关键词：Tunneling ; Surface settlement ; Empirical method ; Numerical Modelling ; Formula optimization
- 会议召开时间：2016-10-24
- 会议录名称：2016中国隧道与地下工程大会（CTUC）暨中国土木工程学会隧道及地下工程分会第十九届年会论文集
- 语种：中文
- 分类号：P642.26;U455.43
- 学会代码：OGTY
- 会议名称：2016中国隧道与地下工程大会（CTUC）暨中国土木工程学会隧道及地下工程分会第十九届年会
- 会议地点：中国四川成都
- 主办单位：中国土木工程学会隧道及地下工程分会
- 学会名称：中国土木工程学会
- 页数：10
- 文件大小：3341k
- 原文格式：O
- 会议级别：全国
摘要
隧道施工引起的地表沉降可能会破坏相邻基础设施的基础,如办公楼、停车场、水管等。有时,这种破坏会严重影响公共设施,这可能对政府造成巨大的经济损失。为了最大限度地减少这些影响,降低经济损失,地表塌陷的预测变得越来越重要。经验方法和数值模拟方法是两种主要的方法,得到了广泛的应用。在第七届国际土力学与基础工程国际会议上,Peck(1969)首次提出了地表沉降预测的经验方法。Peck认为沉降曲线可以用高斯方程来表示,地表沉降量与地下体积损失有关。地下体积损失取决于几个因素,如地质条件、隧道施工技术以及隧道断面形状。数值模拟法,例如有限元法可以对地表沉降预测提供更详细的模拟,因其可以考虑土壤性质、地质条件、地下水位等因素。本文将选取典型工点结合实际检测数据对经验公式法和数值模拟法进行比较和讨论,并考虑成都地层特性、盾构掘进参数以及隧道工程地质条件等方面,优选出适合成都砂卵石地层的经验公式法。在整理分析成都地铁3、7号线盾构隧道施工的实测地表沉降数据的基础上,对O'Reilly&New公式进行修正,提出适用于成都盾构隧道地表沉降的简要计算公式,最后选取成都地铁7号线的盾构区间的断面沉降为例,验证公式的合理件。
The ground settlements caused by tunnelling could damage the foundation of the adjacent infrastructures,such as the office building,car park and the water pipes.Sometimes,this damage could influence public facilities seriously,which could cause huge economic loss for the government.In order to minimize these influences and lower the economic loss,the prediction of surface subsidence becomes more and more important.The empirical method and numerical modelling method are the two main methods which have been widely used.The empirical method of surface settlement prediction was firstly proposed by Peck(1969) in the 7th International Conference of Soil Mechanics and Foundation Engineering.Peck thought that the settlement profile could be represented with Gaussian equation and the magnitude of the subsidence was influenced by the ground volume loss V_L.The numerical modelling methods such as FEM could give more detailed simulations on the prediction of surface subsidence,since soil properties,ground conditions,water table etc.have been considered.In this report both empirical and numerical modelling methods are reviewed,comparison and discussion are made.The geotechnical condition of Chengdu,the shield tunneling parameters and technique has been taken account,in order to select the most suitable tradition empirical method.Based on the analysis of realistic settlement data of Chengdu Metro Line 3 and 7,the classical O' Reilly &Newformula will be optimized,then propose a brief ground surface settlement prediction formula which is suitable for the Chengdu shield tunneling.Finally,a settlement section from Chengdu Metro Line7 will be used in order to verify the rationality of new formula with the discussion of most suitable prediction method for surface settlement above tunneling.
The ground settlements caused by tunnelling could damage the foundation of the adjacent infrastructures,such as the office building,car park and the water pipes.Sometimes,this damage could influence public facilities seriously,which could cause huge economic loss for the government.In order to minimize these influences and lower the economic loss,the prediction of surface subsidence becomes more and more important.The empirical method and numerical modelling method are the two main methods which have been widely used.The empirical method of surface settlement prediction was firstly proposed by Peck(1969) in the 7th International Conference of Soil Mechanics and Foundation Engineering.Peck thought that the settlement profile could be represented with Gaussian equation and the magnitude of the subsidence was influenced by the ground volume loss V_L.The numerical modelling methods such as FEM could give more detailed simulations on the prediction of surface subsidence,since soil properties,ground conditions,water table etc.have been considered.In this report both empirical and numerical modelling methods are reviewed,comparison and discussion are made.The geotechnical condition of Chengdu,the shield tunneling parameters and technique has been taken account,in order to select the most suitable tradition empirical method.Based on the analysis of realistic settlement data of Chengdu Metro Line 3 and 7,the classical O' Reilly &Newformula will be optimized,then propose a brief ground surface settlement prediction formula which is suitable for the Chengdu shield tunneling.Finally,a settlement section from Chengdu Metro Line7 will be used in order to verify the rationality of new formula with the discussion of most suitable prediction method for surface settlement above tunneling.
引文
[1]Atkinson,J.H.,Brown,E.T.,and Pottss,D.M.Collapse of Shallow Unlined Tunnels in Dense Sand[J].Tunnel&Tunnelling,1975,(5):81-87.
[2]Attewell,P.B.and Farmer,I.W.Ground Deformations resulting from Shield Tunnelling in London Clay[J].Canadian Geotech.1974,1(3):380-395.
[3]Attewell,P.B.Ground Movements caused by Tunnelling in Soil[C]//Proc.hit.Conf.of Large Movements and Structures(ed.J.D.Geddes),Pentech Press,London,1978:812-948.
[4]Clough,G.W.and Schmidt,B.Design and Performance of Excavations and Tunnels in Soft Clay.Soft Clay Engineering[M].Elsevier,1981:569-634.
[5]Fujita,K.On the surface settlements caused by various methods of shield tunneling[C]//.Proc.11th Int.Conf.Soil Mech.Found.Engng,San Francisco 12-16 Aug.1985.A.A.Balkema,Rotterdam,The Netherlands.609-610.
[6]Litwiniszyn,J.The theories and model research of movements of ground masses[C]//Proceeding of European Congress Ground Movement,Leeds,UK,1957:203-209.
[7]Mair,R.J.,Gunn,M.J.and 0'Reilly,M.P.Ground movements around shallow tunnels in soft clay[C]//Proc.10th Int.Conf.of Soil Mechanics and Foundation Engineering,Stockhonlm,1981,1:323-328.
[8]Mair,R.J.and Taylor,R.N.Prediction of Clay Behaviour around Tunnelsusing Plastic Solution;C]//Proc.Worth Memorial Symposium,Oxford,1992,Thomas Telford,449-463.
[9]Mair,R.J.,Taylor,R.N.,Bracegirdle,A.Subsurface settlement profiles above tunnels in clays[J].Géotechnique,1993,43(2):315-320.
[10]Martos,F.Concerning all approximate equation of subsidence trough and its time factors[C]//Proc.of the International Strata Control Congress,Leipzig,1958:191-205.
[11]New,B.M.and 0'Reilly,M.P.Tunnelling induced ground movements;predicting their magnitude and effects[C]//Proceedings fo 4th Int.Conf.on Ground Movements and Structures,Pentech Press,London,1991:671-697.
[12]O'Reilly,M.P.and New,B.M.Settlements above tunnels in the United Kingdom-Their Magnitude and Prediction[C]//Proceedings of Tunnelling'82(Brighton),Inst.Mining Metal,London,173-181.
[13]Peck,R.B..Deep excavations and tunnelling in soft ground:state-of-the-art report[C]//Proc.7th Int.Conf:Soil Mech.Found.Engng,Mexico City,25-29 Aug.1969.A.A.Balkema,Rotterdam,The Netherlands.225-290.
[14]Rankin,W.J.Ground movement resulting from urban tunnelling:predictions and effects[J].Geological Society,London,Engineering Geology Special Publications,1988,5:79-92.
[15]Burland,J.B.,Standing,J.R.and Jardine,F.M.Assessing the risk of building due to tunnelling lesson from the Jubilee Line Extension[C]//Proc.Of the fourth Southeast Asian Geotechnical Conf.Hong Kong.2001:17-44.
[16]关宝树.隧道工程施工要点集[M].北京:人民交通出版社,2003.GUAN Baoshu.Collection of Key Points in Construction of Tunnel Project[M].Beijing:China Communications Press,2003.
[17]李桂花.盾构法施工引起的地面沉陷的估算方法[J].同济大学学报(自然科学版),1986,14(2):253-261.LI Guihua.Estimation Method for Ground Subsidence Induced by Shield Construction[J].Journal of Tongji University(Natural Science),1986,14(2):253-261.
[18]章慧健,仇文革.富水砂卵石地层盾构施工地表沉降分析与控制[C]//中华人民共和国教育部国务院学位委员会办公室.2009全国土木工程博士生学术论坛论文集,2009.ZHANG Huijian,QIU Wenge.Analysis and Control of Ground Settlement Induced by Shield Construction in Water-Rich Cobble Ground[C]//Office of Academic Degrees Committee of the State Council,Ministry of Education of the People's Republic of China.Proceedings of the 2009 National Doctoral Academic Forum on Civil Engineering,2009.
[19]韩煊,李宁,JAMIER STANDING.地铁隧道施工引起地层位移规律的探讨[J].岩土力学,2007,28(3):609-613.HAN Xuan,LI Ning,JAMIE R STANDING.Study on Subsurface Ground Movement Caused by Urban Tunneling[J].Rock and Soil Mechanics,2007,28(3):609-613.
[2]Attewell,P.B.and Farmer,I.W.Ground Deformations resulting from Shield Tunnelling in London Clay[J].Canadian Geotech.1974,1(3):380-395.
[3]Attewell,P.B.Ground Movements caused by Tunnelling in Soil[C]//Proc.hit.Conf.of Large Movements and Structures(ed.J.D.Geddes),Pentech Press,London,1978:812-948.
[4]Clough,G.W.and Schmidt,B.Design and Performance of Excavations and Tunnels in Soft Clay.Soft Clay Engineering[M].Elsevier,1981:569-634.
[5]Fujita,K.On the surface settlements caused by various methods of shield tunneling[C]//.Proc.11th Int.Conf.Soil Mech.Found.Engng,San Francisco 12-16 Aug.1985.A.A.Balkema,Rotterdam,The Netherlands.609-610.
[6]Litwiniszyn,J.The theories and model research of movements of ground masses[C]//Proceeding of European Congress Ground Movement,Leeds,UK,1957:203-209.
[7]Mair,R.J.,Gunn,M.J.and 0'Reilly,M.P.Ground movements around shallow tunnels in soft clay[C]//Proc.10th Int.Conf.of Soil Mechanics and Foundation Engineering,Stockhonlm,1981,1:323-328.
[8]Mair,R.J.and Taylor,R.N.Prediction of Clay Behaviour around Tunnelsusing Plastic Solution;C]//Proc.Worth Memorial Symposium,Oxford,1992,Thomas Telford,449-463.
[9]Mair,R.J.,Taylor,R.N.,Bracegirdle,A.Subsurface settlement profiles above tunnels in clays[J].Géotechnique,1993,43(2):315-320.
[10]Martos,F.Concerning all approximate equation of subsidence trough and its time factors[C]//Proc.of the International Strata Control Congress,Leipzig,1958:191-205.
[11]New,B.M.and 0'Reilly,M.P.Tunnelling induced ground movements;predicting their magnitude and effects[C]//Proceedings fo 4th Int.Conf.on Ground Movements and Structures,Pentech Press,London,1991:671-697.
[12]O'Reilly,M.P.and New,B.M.Settlements above tunnels in the United Kingdom-Their Magnitude and Prediction[C]//Proceedings of Tunnelling'82(Brighton),Inst.Mining Metal,London,173-181.
[13]Peck,R.B..Deep excavations and tunnelling in soft ground:state-of-the-art report[C]//Proc.7th Int.Conf:Soil Mech.Found.Engng,Mexico City,25-29 Aug.1969.A.A.Balkema,Rotterdam,The Netherlands.225-290.
[14]Rankin,W.J.Ground movement resulting from urban tunnelling:predictions and effects[J].Geological Society,London,Engineering Geology Special Publications,1988,5:79-92.
[15]Burland,J.B.,Standing,J.R.and Jardine,F.M.Assessing the risk of building due to tunnelling lesson from the Jubilee Line Extension[C]//Proc.Of the fourth Southeast Asian Geotechnical Conf.Hong Kong.2001:17-44.
[16]关宝树.隧道工程施工要点集[M].北京:人民交通出版社,2003.GUAN Baoshu.Collection of Key Points in Construction of Tunnel Project[M].Beijing:China Communications Press,2003.
[17]李桂花.盾构法施工引起的地面沉陷的估算方法[J].同济大学学报(自然科学版),1986,14(2):253-261.LI Guihua.Estimation Method for Ground Subsidence Induced by Shield Construction[J].Journal of Tongji University(Natural Science),1986,14(2):253-261.
[18]章慧健,仇文革.富水砂卵石地层盾构施工地表沉降分析与控制[C]//中华人民共和国教育部国务院学位委员会办公室.2009全国土木工程博士生学术论坛论文集,2009.ZHANG Huijian,QIU Wenge.Analysis and Control of Ground Settlement Induced by Shield Construction in Water-Rich Cobble Ground[C]//Office of Academic Degrees Committee of the State Council,Ministry of Education of the People's Republic of China.Proceedings of the 2009 National Doctoral Academic Forum on Civil Engineering,2009.
[19]韩煊,李宁,JAMIER STANDING.地铁隧道施工引起地层位移规律的探讨[J].岩土力学,2007,28(3):609-613.HAN Xuan,LI Ning,JAMIE R STANDING.Study on Subsurface Ground Movement Caused by Urban Tunneling[J].Rock and Soil Mechanics,2007,28(3):609-613.
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