软岩巷道的弹-黏塑性分析
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摘要
软岩巷道围岩体具有明显的大变形、大地压、长时间持续流变的特性,这使得软岩巷道尤其是衬砌支护之后巷道的大变形研究及控制机理成为复杂的力学问题.本文利用围岩与支护的接触条件,运用弹-黏塑性理论研究了软岩巷道问题,并探讨了巷道位移、支护阻力与黏性系数和时间的关系.研究结果显示:黏性系数越小,时间对于软岩巷道变形影响越大;增大围岩的黏性系数将会减小巷道的变形.
The soft rock tunnel has many particular properties,such as large deformation,great ground pressure,and continuous long time rheology,thus making the study of large deformation and supporting technique of tunnel become a complex problem.According to the contact condition of wall rock and lining and based on the elasto-viscoplastic theory,problems of tunnel deformation and the lining resistance,and their relation with viscosity coefficient and time are discussed.The results show that the tunnel deformation increases with the increase of time,and the smaller the viscosity coefficient,the greater the effect of on deformation of tunnel.So increasing the viscosity coefficient can decrease the deformation of tunnel.
The soft rock tunnel has many particular properties,such as large deformation,great ground pressure,and continuous long time rheology,thus making the study of large deformation and supporting technique of tunnel become a complex problem.According to the contact condition of wall rock and lining and based on the elasto-viscoplastic theory,problems of tunnel deformation and the lining resistance,and their relation with viscosity coefficient and time are discussed.The results show that the tunnel deformation increases with the increase of time,and the smaller the viscosity coefficient,the greater the effect of on deformation of tunnel.So increasing the viscosity coefficient can decrease the deformation of tunnel.
引文
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[2]华心祝,谢广祥.极软岩巷道锚注加固注浆材料研究与应用[J].岩体力学,2004,25(10):1642-1646.HUA Xin-zhu,XIE Guang-xiang.Research on grou-ting material for bolt and grouting reinforcement ofsoft rock tunnel and its application[J].Rock and SoilMechanics,2004,25(10):1642-1646.
[3]刘长武,陆士良.水泥注浆加固对工程岩体的作用与影响[J].中国矿业大学学报,2000,29(5):454-458.LIU Chang-wu,LU Shi-liang.Reinforcement effectof cement grouting on engineering rock mass[J].Journal of China University of Mining&Technolo-gy,2000,29(5):454-458.
[4]李学华,杨宏敏,刘汉喜,等.动压软岩巷道锚注加固机理与应用研究[J].采矿与安全工程学报,2006,23(2):159-163.LI Xue-hua,YANG Hong-min,LIU Han-xi,et al.Research on bolt-grouting reinforcement technologyin dynamic pressure and soft rock roadway[J].Jour-nal of Mining&Safety Engineering,2006,23(2):159-163.
[5]李国富,贾安立,单智勇,等.极软岩巷道锚注支护技术的研究与应用[J].岩石力学与工程学报,2002,21(增刊):2574-2578.LI Guo-fu,JIA An-li,SHAN Zhi-yong,et al.Studyand application of bolting and grouting support tech-nique soft rock roadway[J].Chinese Journal of RockMechanics and Engineering,2002,21(Supp):2574-2578.
[6]李国富.膨胀软岩变形机理与特种控制技术[J].金属矿山,2006(1):18-24.LI Guo-fu.Deformation mechanism of expansible softrock and special control technique[J].Metal Mine,2006(1):18-24.
[7]王小平.软岩巷道合理支护时间模拟研究[J].采矿与安全工程学报,2006,23(1):103-106.WANG Xiao-ping.Time simulation of rational sup-port for soft rock roadway[J].Journal of Mining&Safety Engineering,2006,23(1):103-106.
[8]王仁,黄文彬.塑性力学引论[M].北京:北京大学出版社,1982:96-98.
[9]郑雨天.岩石力学的弹塑黏性理论基础[M].北京:煤炭工业出版社,1988:303-358.
[10]王良,刘元雪.软弱围岩隧道开挖的有限元模拟[J].重庆工学院学报,2005,19(8):104-106.WANG Liang,LIU Yuan-xue.FEM simulation oftunnel excavation of soft and weak wall rocks[J].Journal of Chongqing Institute of Technology,2005,19(8):104-106.
[11]周红波.厚壁圆筒的弹黏塑性解[J].株洲工学院学报,2000,14(3):45-47.ZHOU Hong-bo.Solution to the elastoplastoviscos-ity of thick-wailed tube[J].Journal of Zhuzhou In-stitute of Technology,2000,14(3):45-47.
[12]贾乃文.黏塑性力学及工程应用[M].北京:地震出版社,2000:60-70.
[13]徐芝纶.弹性力学[M].北京:高等教育出版社,1990:85-90.
[14]郑雨天.岩石力学的弹黏塑性理论基础[M].北京:煤炭工业出版社,1988:241-247.
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