郑万高铁大断面岩质隧道掌子面稳定性评价及控制措施
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摘要
为建立施工阶段大断面隧道掌子面稳定性评价方法,结合郑万高铁大型机械化特点,对郑万高铁湖北段隧道掌子面地质信息进行统计分析,将掌子面稳定性分为A整体稳定、B局部掉块、C上半断面不稳定和D全断面不稳定4个级别,并建立以岩石坚硬程度、岩体完整程度和地下水状态3个指标的掌子面稳定性定性分级方法,得出围岩级别与掌子面稳定性的对应关系。研究结果表明:1)岩石坚硬程度、岩体完整程度和地下水状态是围岩分级指标中使用率最高的3个指标;2)Ⅰ、Ⅱ、Ⅲ级围岩的掌子面稳定性为A级。
The geological information of the tunnel face on Hubei Section of Zhengzhou-Wanzhou High-speed Railway is collected and analyzed based on large mechanized construction characteristics; and then the tunnel face stability is divided into four grades,i. e. Grade A( whole stable),Grade B( partial rock-falling),Grade C( partial unstable) and Grade D( whole unstable); finally,a classification method for tunnel face stability is established based on three indices of rock hardness,rock integrity and groundwater status,and the relationships between the stability grades and the surrounding rock grades are obtained. The study results show that:( 1) The three indices,rock hardness,rock integrity and groundwater status are with the highest utilization rate.( 2) The stability of Grade Ⅰ,Ⅱ and Ⅲ surrounding rock belongs to Grade A.
The geological information of the tunnel face on Hubei Section of Zhengzhou-Wanzhou High-speed Railway is collected and analyzed based on large mechanized construction characteristics; and then the tunnel face stability is divided into four grades,i. e. Grade A( whole stable),Grade B( partial rock-falling),Grade C( partial unstable) and Grade D( whole unstable); finally,a classification method for tunnel face stability is established based on three indices of rock hardness,rock integrity and groundwater status,and the relationships between the stability grades and the surrounding rock grades are obtained. The study results show that:( 1) The three indices,rock hardness,rock integrity and groundwater status are with the highest utilization rate.( 2) The stability of Grade Ⅰ,Ⅱ and Ⅲ surrounding rock belongs to Grade A.
引文
[1]周艺.隧道掌子面稳定性分析及其控制技术研究[D].成都:西南交通大学,2010.ZHOU Yi.Study of stability analysis and control technology of tunnel face[D].Chengdu:Southwest Jiaotong University,2010.
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[10]李喆.管棚预支护对隧道掌子面稳定性影响的研究[D].重庆:重庆大学,2015.LI Zhe.Research of effect of pipe roof advanced support on tunnel face stability[D].Chongqing:Chongqing University,2015.
[11]李斌,漆泰岳,吴占瑞,等.隧道掌子面锚杆加固参数确定方法[J].铁道学报,2012,34(10):115.LI Bin,QI Taiyue,WU Zhanrui,et al.Method for determination of reinforcement parameters of fiber glass anchor bar for tunnel face[J].Journal of the China Railway Society,2012,34(10):115.
[2]师晓权.软弱围岩隧道掌子面稳定性控制及预加固技术研究[D].成都:西南交通大学,2012.SHI Xiaoquan.Research on tunnel face stability control and pre-reinforcement technology in weak surrounding rock[D].Chengdu:Southwest Jiaotong University,2012.
[3]赵勇.隧道软弱围岩变形机制与控制技术研究[D].北京:北京交通大学,2012.ZHAO Yong.Study of deformation mechanism and control technology of weak rock surrounding tunnel[D].Beijing:Beijing Jiaotong University,2012.
[4]朱永全.隧道稳定性位移判别准则[J].中国铁道科学,2001,22(6):81.ZHU Yongquan.The criterion of predicting tunnel stability by displacement[J].China Railway Science,2001,22(6):81.
[5]魏琨.中山中路隧道掌子面稳定性与变形控制技术研究[D].重庆:重庆交通大学,2014.WEI Kun.Study of tunnel face stability and deformation control for Zhongshanlu Tunnel[D].Chongqing:Chongqing Jiaotong University,2014.
[6]刘阳.软弱围岩隧道掌子面稳定性判别及变形控制技术[D].石家庄:石家庄铁道大学,2014.LIU Yang.Evaluation of weak surrounding rock tunnel face stability and deformation control technology[D].Shijiazhuang:Shijiazhuang Tiedao University,2014.
[7]关宝树.软弱围岩隧道变形及其控制技术[J].隧道建设,2011,31(1):1.GUAN Baoshu.Deformation of tunnels with soft surrounding rocks and its control[J].Tunnel Construction,2011,31(1):1.
[8]工程地质手册编委会.工程地质手册[M].5版.北京:中国建筑工业出版社,2018.Editorial Board of Engineering Geology Manual.Manual of engineering geology[M].5th ed.Beijing:China Architecture&Building Press,2018.
[9]于丽,王明年,房敦敏,等.岩质围岩施工阶段亚级分级的数量化理论研究[J].岩土力学,2009,30(12):3846.YU Li,WANG Mingnian,FANG Dunmin,et al.Study of quantification theory of rocky surrounding rock subclassification during construction[J].Rock and Soil Mechanics,2009,30(12):3846.
[10]李喆.管棚预支护对隧道掌子面稳定性影响的研究[D].重庆:重庆大学,2015.LI Zhe.Research of effect of pipe roof advanced support on tunnel face stability[D].Chongqing:Chongqing University,2015.
[11]李斌,漆泰岳,吴占瑞,等.隧道掌子面锚杆加固参数确定方法[J].铁道学报,2012,34(10):115.LI Bin,QI Taiyue,WU Zhanrui,et al.Method for determination of reinforcement parameters of fiber glass anchor bar for tunnel face[J].Journal of the China Railway Society,2012,34(10):115.