Tweet Share

• Send by email

  Send by email

  

  The new tunnel construction method applying both cast-in-place concrete linings and segment linings by using a single TBM

  The Hazawa Tunnel is constructed by using a new tunnel construction method. The method is tunneling with a single TBM capable of installing both the precast segmental linings and the cast-in-place concrete linings by SENS (acronym for Shield tunneling method, Extruded concrete lining, New Austrian Tunneling Method, System). The segmental lining is stronger than the cast-inplace concrete lining, and the influence of the segmental linings to the adjacent structures is less than that of cast-in-place concrete linings. But the cost of cast-in-place concrete linings is lower than segmental linings. Therefore, segmental linings are used for the tunnel sectors close to important infrastructures. This paper describes a study of the optimum combination from four points of view, the stability of the lining structures, the effect on adjacent infrastructures, the stability of the construction and economic viability. The paper also describes improvement of the TBM.

  Recipient :

  Name ^* :

  E-mail address ^* :

  ^* Required fields

  Send   or  Cancel

• Print