System for anchoring concrete safety barriers on bridges and roads

Abstract

A system for anchoring concrete safety barriers on bridges and roads, can be cast in place or pre-cast by manufacturers. However, in the prior art, concrete in the pocket of the concrete safety barriers in which bolts attach the barrier to the bridge deck has a tendency to fail when excessive loads are applied. The present invention solves this problem by lining the pocket with a steel plate reinforced by shear studs or welded steel rods in a number of different configurations.

We claim:  
     
         1 . A system for anchoring concrete safety barriers used on bridge and road surfaces, comprising: 
 a precast concrete safety barrier having a crown portion, outwardly extending sloping side portions, and a base portion having a flat bottom;    a plurality of evenly spaced precast pockets on at least one of said sloping side portions, each pocket having a horizontal shelf and a precast throughbore;    a metal plate commensurate in size and shape with the horizontal shelf, having a centered aperture, and positioned on said horizontal shelf over said precast throughbore;    a plurality of metal shear studs positioned adjacent to said centered aperture and anchoring said metal plate to said horizontal shelf; and    a steel anchor rod positioned in the centered aperture and extending downwards and beyond the bottom of the concrete safety barrier, the steel anchor rod being inserted into a drilled hole on the surface of the bridge or the road.    
     
     
         2 . The system according to  claim 1 , wherein an epoxy cement filler composition is provided, and injected into the precast throughbore and into the drilled hole in the bridge or the road surface.  
     
     
         3 . The system according to  claim 1 , wherein an epoxy cement is provided, and applied between the bridge and the road surface and the bottom of the concrete safety barrier.  
     
     
         4 . The system according to  claim 1 , wherein the throughbore and steel anchor rod are configured and arranged so as to enter the bridge and the road surface inclined at an acute angle to the bridge and the road surface.  
     
     
         5 . The system according to  claim 1 , wherein the throughbore and steel anchor rod are configured and arranged so as to enter the bridge and the road surface vertically, at a 90 degree angle, to the bridge and the road surface.  
     
     
         6 . The system according to  claim 1 , wherein the concrete safety barrier is a single sided concrete safety barrier.  
     
     
         7 . The system according to  claim 1 , wherein the concrete safety barrier is a safety shaped concrete safety barrier.  
     
     
         8 . The system according to  claim 1 , wherein the concrete safety barrier is a common median concrete safety barrier.