Milling arrangement for tunnel walls

Abstract

The invention relates to a vehicle with a milling arrangement on top. The milling arrangement includes a milling device for grinding an upper tunnel wall surface like tunnel ceilings of traffic tunnels. Such a vehicle with the milling arrangement according to the invention is suitable for treating tunnel walls such that a desired surface roughness and the removal of carbon black results. This assures that a lining which is applied to the tunnel ceiling and wall surface is sufficiently attached to said surfaces.

1 . A vehicle with a milling arrangement on top, the milling arrangement comprising a milling device for grinding an upper tunnel wall surface.  
   
   
       2 . The vehicle according to  claim 1 , wherein the milling device is in height adjustable with respect to the vehicle.  
   
   
       3 . The vehicle according to  claim 1 , wherein the milling arrangement comprises a support base and a guide extending in a first direction upwardly from the support base, the milling device being arranged movably along the guide.  
   
   
       4 . The vehicle according to  claim 3 , wherein the milling device is tiltable with respect to the guide.  
   
   
       5 . The vehicle according to  claim 4 , wherein the milling device is tiltable around two orthogonal axes which extend orthogonally with respect to the first direction.  
   
   
       6 . The vehicle according to  claim 3 , in which the guide comprises two parallel guiding tracks.  
   
   
       7 . The vehicle according to  claim 6 , wherein the milling device is provided with guiding rolls for movement along the guiding tracks.  
   
   
       8 . The vehicle according to  claim 7 , wherein the guiding tracks each comprise a pair of spaced apart parallel cylindrical members, wherein the space between the cylindrical members is such that a guiding roll can move between them while engaging both cylindrical members.  
   
   
       9 . The vehicle according to  claim 7 , wherein the guiding rolls have a substantially diabolic shape.  
   
   
       10 . The vehicle according to  claim 1 , wherein the milling device comprises a casing and a rotatable milling drum which is arranged in the casing.  
   
   
       11 . The vehicle according to  claim 10 , wherein a motor for driving the milling drum is suspended under the casing.  
   
   
       12 . The vehicle according to  claim 1 , wherein the milling arrangement comprises hydraulic means for pressing the milling device against the tunnel wall with a predetermined constant pressure.  
   
   
       13 . The vehicle according to  claim 12 , wherein the hydraulic means comprise a hydraulic actuator which is coupled with one end to the guide and with the other end to the milling device.  
   
   
       14 . The vehicle according to  claim 10 , wherein the drum comprises two side plates and a plurality of rods situated on an imaginary cylinder, on which rods a plurality of space apart milling elements are rotatably arranged.  
   
   
       15 . The vehicle according to  claim 10 , wherein the milling drum is in height adjustable with respect to the casing so as to allow adjustment of the cutting depth of the milling device.  
   
   
       16 . A milling arrangement construed and arranged for use in a vehicle according to  claim 1 .  
   
   
       17 . The milling arrangement according to  claim 16 , which is adapted to be liftable by a forklift.  
   
   
       18 . A method for grinding an upper tunnel wall surface, wherein a forklift lifts a milling arrangement which is adapted to be liftable by a forklift and wherein the surface is grinded by driving the forklift through the tunnel.