Tweet Share

• Send by email

  Send by email

  

  Damage cause and renovation of base structure of a railway tunnel at slightly-dipping interbedding rocks: a case study

  The Y.D. Tunnel, designed with double block ballastless tracks in Southwest China was excavated at low-medium thick slightly-dipping interbedding rock mass of medium-weathered mudstone and sandstone. A high uplift appeared in the tunnel floor within the region of K208+620~+629 after the tunnel was put into service, seriously influencing the railway operation. In-situ stress was measured; indicating that high horizontal stress existed in the ground was nearly perpendicular to the tunnel axis.Damage cause of the base structure and the effect of invert form on its performance were analyzed with numerical simulation. The potential renovation approaches were compared and analyzed. Thencables and rock bolts were proposed to renovate the damaged invert.Results of field monitoring indicated that the renovation proposed greatly mitigated the uplift.

  Recipient :

  Name ^* :

  E-mail address ^* :

  ^* Required fields

  Send   or  Cancel

• Print