摘要
根据工程塌方处治实例,探讨了浅埋隧道塌方处治中超前支护系统的作用原理,利用有限元手段分析了二次衬砌结构的内力情况,给出了塌方处治方案,根据处治效果可得出:(1)管棚注浆法作为一种行之有效的辅助工法,其力学效应是显著的;(2)处于浅埋顺层围岩条件下的隧道,围岩的变形往往带有突然性;(3)施工中及时构筑二次衬砌,早日形成封闭式支承体系,加快围岩变形稳定过程,可有效地抑制围岩过度变形及塌方事故。
Based on an engineering case,the mechanism of the pre-support system applied in treatment for the collapse of shallow-buried tunnel is discussed.Moreover,the internal force of the second lining is analyzed by means of FEM and the procedure to treat the collapse of shallow-buried tunnel is given.Some conclusions can be drawn based on the treatment effectiveness:(1) shed-pipe grouting technology is an effective assistant construction method,and the mechanical effect is significant;(2) the deformation of the tunnel bedding wall rock often has some abruptness;and(3) the second lining should be constructed in time so as to form the closed-end supporting system earlier,which can accelerate the stabilization process of the deformation of surrounding rock and prevent the excessive deformation of surrounding rock and tunnel collapse.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2006年第z2期3976-3981,共6页
Chinese Journal of Rock Mechanics and Engineering
关键词
隧道工程
浅埋隧道
塌方处治
tunneling engineering
shallow-buried tunnel
collapse treatment
