大变形隧道长短锚杆支护机理及设计应用
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摘要
以常用锚杆支护理论为依托,根据锚杆的受力特点,分析了大变形隧道长短锚杆各自的支护机理,提出了其参数的设计方法,并通过算例计算和数值模拟验证的方式对其合理性进行了验证。结果表明,大变形隧道长短锚杆组合支护中,短锚杆加固浅部围岩形成承载拱结构,长锚杆将浅部承载拱结构稳定到深部围岩,两者联合支护有效地控制了隧道的大变形,支护方式有效,参数设计方法合理,保证了隧道的支护效果,对隧道支护设计具有重要的工程参考意义。
Basing on the common anchor supporting theory,the respective supporting mechanism according to the characteristics of the long and short anchor in large deformation tunnel were analyzed.Then the designing method of long and short anchor was put forward by its mechanical characteristics,and this designing method was proved by calculating the practical example and numerical modeling.The results showed that using the long and short anchor supporting method,short anchor reinforced shallow surrounding rock into load-bearing arch,long anchor put it stability to the deep rock,long anchor combined with short anchor can control the tunnel deformation effectively.The supporting way is effective.The parameter design method is rational.It ensures the tunnel supporting effect and has certain project reference value for the tunnel supporting design.
Basing on the common anchor supporting theory,the respective supporting mechanism according to the characteristics of the long and short anchor in large deformation tunnel were analyzed.Then the designing method of long and short anchor was put forward by its mechanical characteristics,and this designing method was proved by calculating the practical example and numerical modeling.The results showed that using the long and short anchor supporting method,short anchor reinforced shallow surrounding rock into load-bearing arch,long anchor put it stability to the deep rock,long anchor combined with short anchor can control the tunnel deformation effectively.The supporting way is effective.The parameter design method is rational.It ensures the tunnel supporting effect and has certain project reference value for the tunnel supporting design.
引文
[1]刘泮兴,任秋儒,朱永全.锚杆支护在整治高地应力软岩隧道大变形的效应分析.石家庄铁道学院学报[J],2006,(3):27-29 LIU Pan-xing,REN Qiu-ru,ZHU Yong-quan.The effectanalysis of rockbolt support in regulating large deformation of high ground-stress and soft-rock tunnel[J].Journal of Shijiazhuang Railway Institute,2006,(3):27-29
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[5]王光勇,顾金才,陈安敏,等.端部消波和加密锚杆支护洞室抗爆能力模型试验研究[J].岩石力学与工程学报,2010,1(1):51-57 WANG Guang-yong,GU Jin-cai,CHEN An-min,et al.Model test research on anti-explosion capacity of under-ground openings with end wave-decay by holes and rein-forced by dense rock bolts[J].Chinese Journal of Rock Mechanics and Engineering,2010,1(1):51-57
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[7]Man-chu Ronald Yeung.Application of shi’s discontinuous deformation analysis to the study of rock behavior[D].Department of Civil Engineering College of Engineering University of California Berkeley.1991
[8]邵学富,朱菊辉,童立元.大跨浅埋公路隧道CRD法施工围岩松动圈量测与分析[J].交通标准化,2008,(1):173 SHAO Xue-fu,ZHU Ju-hui,TONG li-yuan.Test and a-nalysis on loosing zone of surrounding rock of big-span shallow overburden tunnel constructed by CRD method[J].Communications Standardization,2008,(1):173
[9]韩永琦,李来喜,昌彦君.地震折射层析法在隧洞围岩松动圈测试中的应用[J].工程地球物理学报,2004,1(5):412-416 HAN Yong-qi,LI Lai-xi,CHANG Yan-jun.An applica-tion of seismic refraction tomography method in investiga-ting loosing rock zone of tunnel[J].Chinese Journal of Engineering Geophysics,2004,1(5):412-416
[10]L.金等著,陈丹妮译.节理各向异性摩擦及剪切刚度的三维本构模型[J].水电科技情报,1996,(1):40 L.Jin etc,Chen Danni.Three dimensional constitutive model of anisotropic friction joints and shear stiffness[J].Hydropower Science and technology information,1996,(1):40
[2]谭忠盛,喻渝,王明年.大断面深埋黄土隧道锚杆作用效果的试验研究[J].岩石力学与工程学报,2008,27(8):1618-1625 TAN Zhong-sheng,YU Yu,WANG Ming-nian.Experi-mentalresearch on bolt anchorage effect on large-section deep-buried tunnelin loess[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(8):1618-1625
[3]周明.大变形破碎岩体中锚杆的支护作用及应用技术研究[D].四川成都,西南交通大学,2007
[4]林存友.堡镇隧道围岩变形破坏特征及支护措施探讨[J].筑路机械与施工机械化,2008,(7):67-69 LIN Cun-you.Discussion on deformation characterristic of surrounding rocks and support measure for baozhen tunnel[J].Briage and Tunnel Machinery&Construction Tech-nology,2008,(7):67-69
[5]王光勇,顾金才,陈安敏,等.端部消波和加密锚杆支护洞室抗爆能力模型试验研究[J].岩石力学与工程学报,2010,1(1):51-57 WANG Guang-yong,GU Jin-cai,CHEN An-min,et al.Model test research on anti-explosion capacity of under-ground openings with end wave-decay by holes and rein-forced by dense rock bolts[J].Chinese Journal of Rock Mechanics and Engineering,2010,1(1):51-57
[6]朱效嘉.煤矿巷道锚杆群支护有关布置问题的探讨[J].安徽理工大学学报,1987,(2)ZHU Xiao-jia.A discussion about arrangement of roof bolt groups in mine roadways[J].Journal of Huainan Institute of Technology,1987,(2)
[7]Man-chu Ronald Yeung.Application of shi’s discontinuous deformation analysis to the study of rock behavior[D].Department of Civil Engineering College of Engineering University of California Berkeley.1991
[8]邵学富,朱菊辉,童立元.大跨浅埋公路隧道CRD法施工围岩松动圈量测与分析[J].交通标准化,2008,(1):173 SHAO Xue-fu,ZHU Ju-hui,TONG li-yuan.Test and a-nalysis on loosing zone of surrounding rock of big-span shallow overburden tunnel constructed by CRD method[J].Communications Standardization,2008,(1):173
[9]韩永琦,李来喜,昌彦君.地震折射层析法在隧洞围岩松动圈测试中的应用[J].工程地球物理学报,2004,1(5):412-416 HAN Yong-qi,LI Lai-xi,CHANG Yan-jun.An applica-tion of seismic refraction tomography method in investiga-ting loosing rock zone of tunnel[J].Chinese Journal of Engineering Geophysics,2004,1(5):412-416
[10]L.金等著,陈丹妮译.节理各向异性摩擦及剪切刚度的三维本构模型[J].水电科技情报,1996,(1):40 L.Jin etc,Chen Danni.Three dimensional constitutive model of anisotropic friction joints and shear stiffness[J].Hydropower Science and technology information,1996,(1):40
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