Method and device for correcting the position of a slab construction consisting of precast concrete slabs

Abstract

The invention relates to a method for correcting the position of a slab construction, especially a solid carriageway for high-speed vehicles, consisting of precast concrete slabs ( 1 ). The precast slabs ( 1 ) are supported by a substrate made from hardenable underpoured material ( 4 ) and a supporting layer ( 5 ) on the base. In order to correct the person of at least one precast slab ( 1 ), the precast slab ( 1 ) is at least partially detached from the substructure, especially from the under poured material ( 4 ) and/or the supporting layer ( 5 ), whereupon it is finely aligned and then underpoured once more with said material ( 4 ). A separating device ( 20.21 ) is arranged on a precast concrete slab ( 1 ) which is to be detached on a successive precast concrete slab in a device provided with one such separating device in order to detach at least one part of a concrete slab ( 1 ) pertaining to a solid carriageway for high speed vehicles from the substructure thereof, especially when the position is corrected.

Claimed is:  
     
         1 . A method for positional correction of a slab construction of precast concrete slabs ( 1 ), especially for an existing carriageway for high speed vehicles, wherein the precast concrete slabs ( 1 ) are supported by an under construction of a hard curing undergrout ( 4 ) and a carrier layer ( 5 ) of base fill, therein characterized, in that for said positional correction of at least one precast concrete slab ( 1 ), the said precast concrete slab ( 1 ) is at least partially separated from the under construction, in particular, from the undergrout ( 4 ), and/or from the carrier layer ( 5 ) and is subsequently finely aligned, and then supplied anew with undergrout ( 4 ).  
     
     
         2 . A method in accord with  claim 1 , therein characterized in that the under support, particularly the undergrout ( 4 ), is at least partially separated.  
     
     
         3 . A method in accord with one of the foregoing claims, therein characterized in that the understructure, particularly the undergrout ( 4 ), is separated in the longitudinal direction or in the horizontal direction from the precast concrete slab ( 1 ).  
     
     
         4 . A method in accord with one of the foregoing claims, therein characterized, in that the undergrout ( 4 ) is essentially separated at, or in proximity to, the contacting surface of the precast concrete slab ( 1 ) and/or the carrying layer ( 5 ).  
     
     
         5 . A method in accord with one of the foregoing claims, therein characterized, in that the understructure, in particular the undergrout, is separated over the complete breadth of the precast concrete slab ( 1 ).  
     
     
         6 . A method in accord with one of the foregoing claims, therein characterized, in that before the separation of the understructure, in particular, the undergrout ( 4 ), an opening is made in the understructure, in particular the undergrout ( 4 ) for the insertion of a separating means, in particular a saw blade.  
     
     
         7 . A method in accord with one of the foregoing claims, therein characterized, in that the separation line exhibits a length, which is unequal to the length of a precast concrete slab ( 1 ), and especially is not on the contact location where two precast concrete slabs ( 1 ) abut.  
     
     
         8 . A method in accord with one of the foregoing claims, therein characterized, in that on the precast concrete slab ( 1 ), filling openings ( 9 ) are opened or created and employed for the renewed under-pouring.  
     
     
         9 . A method in accord with one of the foregoing claims, therein characterized, in that closed filling openings for the old undergrout ( 4 ) are opened and made use of for renewed undergrouting.  
     
     
         10 . A method in accord with one of the foregoing claims, therein characterized, in that the precast concrete slab ( 1 ) is exactly aligned by especially mechanical or hydraulic lifting means, such as spindles or lifting cushions, these means being placed inside and/or outside the present concrete slab ( 1 ).  
     
     
         11 . A method in accord with one of the foregoing claims, therein characterized, in that before the separation, the spindles ( 7 ) are removed from the from the area of said separating cut.  
     
     
         12 . A method in accord with one of the foregoing claims, therein characterized, in that the spindles ( 7 ) are replaced in their support locations only after the separation.  
     
     
         13 . A method in accord with one of the foregoing claims, therein characterized, in that the precast concrete slab ( 1 ) is undergrouted with an especially rapid-cure bitumen cement mortar, a plastic, or a cement mortar.  
     
     
         14 . A method in accord with one of the foregoing claims, therein characterized, in that the understructure, especially the undergrout ( 4 ) is separated by a saw, in particular a cable saw ( 20 ), a chain saw, or blade saw.  
     
     
         15 . A method in accord with one of the foregoing claims, therein characterized, in that the understructure, especially the undergrout ( 4 ) is separated by an oxygen lance.  
     
     
         16 . A method in accord with one of the foregoing claims, therein characterized, in that the understructure, especially the undergrout ( 4 ) is separated by a high pressure water stream.  
     
     
         17 . A method in accord with one of the foregoing claims, therein characterized, in that the cut opening in the understructure is cleaned before the renewed pour of grout.  
     
     
         18 . A method in accord with one of the foregoing claims, therein characterized, in that for the more rapid binding of the undergrout ( 4 ), the pour location is heated.  
     
     
         19 . A method in accord with one of the foregoing claims, therein characterized, in that a complete precast concrete slab ( 1 ) can be removed from the slab construction and replaced by an exchange slab.  
     
     
         20 . A device with a separation apparatus for the release of at least one part of a precast concrete slab ( 1 ) of an existing carriageway for rail guided, high speed, vehicles from its understructure, especially in the case of a positional correction in accord with one of the foregoing claims, therein characterized, in that the separating apparatus ( 20 ,  21 ) is placed on the precast concrete slab ( 1 ) which is to be loosened or on an adjacent following precast concrete slab ( 1 ).  
     
     
         21 . A device with a separating apparatus for the loosening from its understructure of at least a part of a precast concrete slab ( 1 ) of an existing carriageway for rail guided high speed vehicles, especially in the case of a positional correction in accord with the foregoing claims, therein characterized, in that the separation device ( 20 ,  21 ) is placed on a guide structure independent of the precast concrete slab ( 1 ) to be loosened, in particular on an adjoining track.  
     
     
         22 . A device in accord with the foregoing claim, therein characterized, that the separating device ( 20 ,  21 ) cuts through the understructure, especially the undergrout layer ( 4 ) placed beneath the precast concrete slab ( 1 ).  
     
     
         23 . A device in accord with one of the foregoing claims, therein characterized, in that the precast concrete slabs ( 1 ) are bound together.  
     
     
         24 . A device in accord with one of the foregoing claims, therein characterized, in that the separating apparatus ( 20 ) is placed on the rails ( 2 ) of a first or second precast concrete slab ( 1 ).  
     
     
         25 . A device in accord with one of the foregoing claims, therein characterized, in that the separating apparatus ( 20 ) is part of an assembly ( 20 ,  21 ) and within the said assembly ( 20 ,  21 ) exercises a thrust in a longitudinal direction of the precast concrete slab ( 1 ).  
     
     
         26 . A device in accord with one of the foregoing claims, therein characterized in that the separation apparatus ( 20 ) and/or the assemble ( 20 ,  21 ) is guided on the rails ( 2 ).  
     
     
         27 . A device in accord with one of the foregoing claims, therein characterized, in that the assembly ( 20 ,  21 ) is secured to the said rails ( 2 ), preferably, is clamped thereon.