| 摘要 |
The road surface is broken up over the entire length of the tunnel to be built, including the tunnel entrances and exits, then a new road surface is laid using abutting concrete panels (1) that extend over at least one lane in the tunnel. Wall columns (33) are formed to support the ends of the concrete panels and the area beneath these panels is excavated to form the tunnel tube and at least part of the entrances and exits. The tunnel floor and walls are formed and then finally the concrete panels over the entrances and exits are removed so that these entrances and exits and be connected to the tunnel and finished. An independent claim is also included for a concrete panel suitable for this construction method, which contains one or more passages (29) extending between its top and bottom sides at either end. |
