上软下硬地层地铁车站大跨隧道围岩稳定性与覆岩厚度关系研究
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- 英文论文题名：Study on the Relationship between the Stability of Surrounding Rock and the Thickness of Overburden Rock of Metro Station Tunnel with Large-span in Upper-soft and Lower-hard Stratum
- 论文作者：张自光 ; 仇文革 ; 孙克国
- 英文论文作者：ZHANG Ziguang ; QIU Wenge ; SUN Keguo ; Key Laboratory of Transportation Tunnel Engineering ; Ministry of Education ; School of Civil Engineering ; SouthwestJiaotong University
- 年：2016
- 作者机构：西南交通大学交通隧道工程教育部重点实验室土木工程学院;
- 论文关键词：上软下硬地层 ; 地铁隧道 ; 围岩稳定性 ; 覆岩厚度
- 英文论文关键词：Upper-Soft and Lower-Hard Stratum ; Metro Tunnel ; Stability of Surrounding Rock ; Thickness of Overburden Rock
- 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：U231;U451.2
- 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：6
- 文件大小：1446k
- 原文格式：O
- 会议级别：全国
摘要
立足于充分发挥围岩自承能力,文章采用数值计算、理论分析、现场监测数据统计分析相结合的手段,对上软下硬地层地铁隧道围岩稳定性与覆岩厚度(H_r)关系进行深入研究。结果表明,隧道开挖引起的应力释放和应力转移主要发生在下覆坚硬地层范围内;随着H_r增大,洞室拱顶竖向位移S先迅速减小后逐渐增大,存在最小值,安全系数K先迅速增大后逐渐减小,存在最大值,两者具有内在统一性。从工程安全角度出发,提出了满足围岩自稳要求的最小覆岩厚度(H_(rmin))和使隧道洞室达最大安全性的最佳覆岩厚度(H_(ropt))两个概念,并指出上软下硬地层隧道合理的H_r应处于H_(rmin)与H__(ropt)两者之间,为地铁隧道合理埋深选择提供了理论基础和方法。
Based on playing the fully role of self-supporting ability of surrounding rock,this paper studies the relationship between the stability of surrounding rock and the thickness of overburden rock of metro station tunnel with large-span in upper-soft and lower-hard stratum by the numerical calculation,theoretical analysis and statistical analysis on field monitoring.Results show that stress release and transfer caused by tunnel excavation in upper-soft and lower-hard stratum distribute mainly in the surrounding rock stratum and have less impact to soft stratum;With the increase ofthe thickness of overburden rock(H_r),the vertical displacement(S) of tunnel vault first decreases suddenly and then increases slowly,existing a minimum value,meanwhile,the safe factor K first increases suddenly and then decreases slowly,existing a maximum value;they have inherent unity.Two conceptions which are the minimum thicknessof overburden rock(H_(rmin)) and the optimum thicknessof overburden rock(H_(ropt)) are proposed from the view of engineering safety.The reasonable thicknessof overburden rock(H_r) should be between the H_(rmin) and H_(ropt),providing a theoretical basis for determining the reasonable depth of metro tunnel.
Based on playing the fully role of self-supporting ability of surrounding rock,this paper studies the relationship between the stability of surrounding rock and the thickness of overburden rock of metro station tunnel with large-span in upper-soft and lower-hard stratum by the numerical calculation,theoretical analysis and statistical analysis on field monitoring.Results show that stress release and transfer caused by tunnel excavation in upper-soft and lower-hard stratum distribute mainly in the surrounding rock stratum and have less impact to soft stratum;With the increase ofthe thickness of overburden rock(H_r),the vertical displacement(S) of tunnel vault first decreases suddenly and then increases slowly,existing a minimum value,meanwhile,the safe factor K first increases suddenly and then decreases slowly,existing a maximum value;they have inherent unity.Two conceptions which are the minimum thicknessof overburden rock(H_(rmin)) and the optimum thicknessof overburden rock(H_(ropt)) are proposed from the view of engineering safety.The reasonable thicknessof overburden rock(H_r) should be between the H_(rmin) and H_(ropt),providing a theoretical basis for determining the reasonable depth of metro tunnel.
引文
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[3]邹飞虎.青岛地铁暗挖车站围岩稳定性与覆岩厚度关系研究[D].西南交通大学.2016.ZOU Feihu.Studies on the relationship between the stability of surrounding rock and the width of overlaying strata based on mined underground station in Qingdao Metro[D].Southwest Jiaotong University,2016.
[4]王旭东,周生华、迟建平、吴学峰.上软下硬地层浅埋暗挖隧道覆跨比研究[J].地下空间与工程学报,2011,7(4):700-705.WANG Xudong,ZHOU Shenghua,CHI Jianping,WU Xuefeng.Study on shallow-buried tunnel's thickness-span ratio in upper-soft lower-hard ground[J].Chinese Journal of Underground and Space and Engineering,2011,7(4):700-705.
[5]韩科周,王在泉,等.“上软下硬”地层条件下地铁车站合理埋深确定[J].地下空间与工程学报,2011,7(S2):1594-1597.HAN Kezhou,WANG Zaiquan,et al.Method of determining the depth of mass transit railway station under stratified geological conditions[J].Chinese Journal of Underground and Space and Engineering,2011,7(S2):1594-1597.
[6]张永兴,王桂林,胡居义.岩石洞室地基稳定性分析方法与实践[M].北京:科学出版社,2005.ZHANG Yongxing,WANG Guilin,HU Juyi.Stability Analysis Method and Practice of Rock cavern foundation[M].Beijing:Science and Technology Press,2005.
[7]李术才,徐帮树,蔚立元.钻爆法施工的海底隧道最小岩石覆盖厚度确定方法[M].北京:科学出版社,2013.LI Shucai,XU Bangshu.WEI Liyuan.Channel Tunnel Method for Determining the Minimum Rock Cover Thickness of Drilling and Blasting Method Construction[M].Beijing:Science and Technology Press,2013.
[8]杨臻,郑颖人,等.岩石隧道支护结构设计计算方法探索[J].岩土力学,2009,30:148-154.YANG Zhen,ZHENG Yingren,et al.Explorating computational method of designing the supporting structure of rock tunnel[J].Rock and Soil Mechanics,2009,30:148-154.
[9]杨臻,郑颖人,等.岩石隧道围岩稳定性分析及强度参数的探讨[J].地下空间与工程学报,2009,5(2):283-289.YANG Zhen,ZHENG Yingren,et al.Analysis on Stability for the Surrounding Rock of Tunnel and Exploring the Strength Parameters[J].Chinese Journal of Underground Space and Engineering,2009,5(2):283-289.
[10]QIU W.G.,KONG C,LIU K.Three-dimensional numbercial analysis of the tunnel for polyaxial state of stress[J].Mathematical Problems in Engineering,2015,20:1-8.
[11]阿尔比特,郑颖人,冯夏庭,向钰周.应力释放后隧道稳定安全系数研究[J].现代隧道技术,2016,53(2):70-76.ABI Eedi.,ZHENG Y.R.,FENG X.T.,XIANG Y.Z.,Study of the safety for tunnel stability considering the stress resease effect[J].Modern Tunnelling Technology,2016,53,(2):70-76.
[12]郑颖人,邱陈瑜.普氏压力拱理论的局限性[J].现代隧道技术,2016,53(2):1-8.ZHENG Yingren,QIU Chenyu.On the limitations of Protodyakonov's pressure arch theory[J].Modern Tunnelling Technology,2016,53(2):1-8.
[13]孔超,仇文革、章慧健、满帅.基于岩石数值极限分析法的洞群围岩稳定性研究[J].现代隧道技术,2013,50(6):66-71.KONG Chao,QIU Wenge,ZHANG Huijian,MAN Shuai.A Study of the Rock Mass Stability of a Tunnel Group Based on Numerical Limit Analysis[J].Modern Tunnelling Technology,2013,50(6):66-71.
[14]郑颖人.岩土数值极限分析方法的发展与应用[J].岩石力学与工程学报,2012,31(7):1297-1316.ZHENG Yingren.Development and Application of Numerical Limit Analysis for Geological Materials[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(7):1297-1316.
[2]张自光,仇文革.上软下硬地层暗挖地铁隧道合理岩跨比探讨及实例分析[J].现代隧道技术,2015,52(6):28-35.ZHANG Ziguang,QIUWenge.Discussion and instance analysis on rational rock-thickness span ratio of buried metro tunnelin upper-soft and lower-hard stratum[J].Modern Tunnelling Technology,2015,52(6):28-35.
[3]邹飞虎.青岛地铁暗挖车站围岩稳定性与覆岩厚度关系研究[D].西南交通大学.2016.ZOU Feihu.Studies on the relationship between the stability of surrounding rock and the width of overlaying strata based on mined underground station in Qingdao Metro[D].Southwest Jiaotong University,2016.
[4]王旭东,周生华、迟建平、吴学峰.上软下硬地层浅埋暗挖隧道覆跨比研究[J].地下空间与工程学报,2011,7(4):700-705.WANG Xudong,ZHOU Shenghua,CHI Jianping,WU Xuefeng.Study on shallow-buried tunnel's thickness-span ratio in upper-soft lower-hard ground[J].Chinese Journal of Underground and Space and Engineering,2011,7(4):700-705.
[5]韩科周,王在泉,等.“上软下硬”地层条件下地铁车站合理埋深确定[J].地下空间与工程学报,2011,7(S2):1594-1597.HAN Kezhou,WANG Zaiquan,et al.Method of determining the depth of mass transit railway station under stratified geological conditions[J].Chinese Journal of Underground and Space and Engineering,2011,7(S2):1594-1597.
[6]张永兴,王桂林,胡居义.岩石洞室地基稳定性分析方法与实践[M].北京:科学出版社,2005.ZHANG Yongxing,WANG Guilin,HU Juyi.Stability Analysis Method and Practice of Rock cavern foundation[M].Beijing:Science and Technology Press,2005.
[7]李术才,徐帮树,蔚立元.钻爆法施工的海底隧道最小岩石覆盖厚度确定方法[M].北京:科学出版社,2013.LI Shucai,XU Bangshu.WEI Liyuan.Channel Tunnel Method for Determining the Minimum Rock Cover Thickness of Drilling and Blasting Method Construction[M].Beijing:Science and Technology Press,2013.
[8]杨臻,郑颖人,等.岩石隧道支护结构设计计算方法探索[J].岩土力学,2009,30:148-154.YANG Zhen,ZHENG Yingren,et al.Explorating computational method of designing the supporting structure of rock tunnel[J].Rock and Soil Mechanics,2009,30:148-154.
[9]杨臻,郑颖人,等.岩石隧道围岩稳定性分析及强度参数的探讨[J].地下空间与工程学报,2009,5(2):283-289.YANG Zhen,ZHENG Yingren,et al.Analysis on Stability for the Surrounding Rock of Tunnel and Exploring the Strength Parameters[J].Chinese Journal of Underground Space and Engineering,2009,5(2):283-289.
[10]QIU W.G.,KONG C,LIU K.Three-dimensional numbercial analysis of the tunnel for polyaxial state of stress[J].Mathematical Problems in Engineering,2015,20:1-8.
[11]阿尔比特,郑颖人,冯夏庭,向钰周.应力释放后隧道稳定安全系数研究[J].现代隧道技术,2016,53(2):70-76.ABI Eedi.,ZHENG Y.R.,FENG X.T.,XIANG Y.Z.,Study of the safety for tunnel stability considering the stress resease effect[J].Modern Tunnelling Technology,2016,53,(2):70-76.
[12]郑颖人,邱陈瑜.普氏压力拱理论的局限性[J].现代隧道技术,2016,53(2):1-8.ZHENG Yingren,QIU Chenyu.On the limitations of Protodyakonov's pressure arch theory[J].Modern Tunnelling Technology,2016,53(2):1-8.
[13]孔超,仇文革、章慧健、满帅.基于岩石数值极限分析法的洞群围岩稳定性研究[J].现代隧道技术,2013,50(6):66-71.KONG Chao,QIU Wenge,ZHANG Huijian,MAN Shuai.A Study of the Rock Mass Stability of a Tunnel Group Based on Numerical Limit Analysis[J].Modern Tunnelling Technology,2013,50(6):66-71.
[14]郑颖人.岩土数值极限分析方法的发展与应用[J].岩石力学与工程学报,2012,31(7):1297-1316.ZHENG Yingren.Development and Application of Numerical Limit Analysis for Geological Materials[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(7):1297-1316.