| 摘要 |
A construction method for a two-arch tunnel using a lattice girder, according to the present invention, includes the following steps of: excavating a pilot tunnel; installing first and second support walls along the length of the pilot tunnel, and making at least one of the first or second support wall to be prepared with lattice girders separated at predetermined intervals; installing partitions between each pair of neighboring lattice girders along the length of the pilot tunnel; conducting a shotcrete work onto the partitions; depositing concrete between the first and second support walls to form a central support wall; and excavating final tunnels on both sides of the central support wall. |
