Method and arrangement for attachment and/or disassembly/assembly of a tunnel thruster

1. An assembly/disassembly arrangement for a tunnel thruster unit, comprising a thruster unit and a tunnel, a first attachment arrangement for fitting of said thruster unit to said tunnel and at least one further attachment arrangement for safe fitting of said thruster unit in said tunnel, further comprising having said further attachment arrangement in the form of a first interface device fixedly attached to and horizontally protruding from the inside of the tunnel wall in a traverse direction in relation to a longitudinal extension of the tunnel and a second interface device fixedly attached to said thruster unit.

2. The arrangement according to claim 1 , wherein said first and second interface devices are releasably attached to each other by means of a releasable clamping unit.

3. The arrangement according to claim 1 , wherein said interface devices extend substantially in a plane that is parallel with an extension of the tunnel.

4. The arrangement according to claim 3 , wherein at least one of said interface devices is in the form of a plate.

5. The arrangement according to claim 3 , wherein said interface devices present a gap between their opposing end portions.

6. The arrangement according to claim 1 , wherein said first interface device is arranged to fit together with a third interface device of an installation arrangement.

7. The arrangement according to claim 6 , wherein said third interface, at least in one direction has a width that is smaller than a width of the first interface.

8. The arrangement according to claim 6 , wherein said installation arrangement comprises a crossbar carrying a pulling device, whereby arm portions are arranged between said third interface device and said crossbar to securely fix the crossbar a substantial distance away from a transversal vertical plane including said first interface devices.

9. The arrangement according to claim 8 , wherein said arm portions are inclined an angle in relation to a centre axis of said tunnel.

10. A method of assembling a thruster unit in a tunnel, comprising the steps of providing a drive connection interface in the tunnel, providing a thruster unit with a corresponding attachment interface, providing a pulling device for pulling the thruster unit into the tunnel for fitting by connecting said interfaces, further comprising: remotely from said drive connection interface providing a first interface device fixedly attached to and protruding from an inside wall of the tunnel providing a second interface device attached to the thruster unit, providing a fixing arrangement to safely interconnect said first and second interfaces; and providing a sliding unit for movement of the thruster unit within the tunnel.

11. The method according to claim 10 , further comprising providing said pulling device on a structure having a third interface adapted to fit onto said first interface devices.

12. The method according to claim 10 , further comprising providing a hydraulic unit between said sliding unit and said thruster unit and a control unit arranged for adjustment of a position of the thruster unit on the sliding unit.

13. An assembly/disassembly arrangement for a tunnel thruster unit, comprising a thruster unit and a tunnel, a first attachment arrangement for fitting of said thruster unit to said tunnel and at least one further attachment arrangement for safe fitting of said thruster unit in said tunnel, further comprising having said further attachment arrangement in the form of a first interface device fixedly attached to and protruding from the inside of the tunnel wall and a second interface device fixedly attached to said thruster unit, wherein said first interface device is arranged to fit together with a third interface device of an installation arrangement, and wherein said installation arrangement comprises a crossbar carrying a pulling device, whereby arm portions are arranged between said third interface device and said crossbar to securely fix the crossbar a substantial distance away from a transversal vertical plane including said first interface devices.

14. The arrangement according to claim 13 , wherein said first and second interface devices are releasably attached to each other by means of a releasable clamping unit.

15. The arrangement according to claim 13 , wherein said interface devices extend substantially in a plane that is parallel with an extension of the tunnel.

16. The arrangement according to claim 13 , wherein at least one of said interface devices is in the form of a plate.

17. The arrangement according to claim 13 , wherein said interface devices present a gap between their opposing end portions.

18. The arrangement according to claim 13 , wherein said third interface, at least in one direction has a width that is smaller than a width of the first interface.

19. The arrangement according to claim 13 , wherein said arm portions are inclined an angle in relation to a centre axis of said tunnel.