Reduced-thickness reinforced concrete pavement
View Patent ↗A pavement ( 11 ) formed by an assembly of concrete slabs ( 13 ) of thickness H, each slabs ( 13 ) comprising a plurality of superficial grooves ( 15, 17 ) of height H 3 , delimiting sub-slabs ( 21 ) and, as reinforcement, an assembly of tie bars ( 25, 27; 26, 28 ) for tying adjacent sub-slabs ( 21 ) on either sides of said superficial grooves ( 15, 17 ), the bars being disposed below the sub-slabs at a distance H 2.
1. Pavement ( 11 ) formed by a set of concrete slabs ( 13 ) with an H thickness, characterized by:
each of these slabs ( 13 ) has several superficial grooves ( 15 , 17 ) of an H 3 height delimiting sub-slabs ( 21 );
comprises, as reinforcement, of a set of tie bars ( 25 , 27 ; 26 , 28 ) of sub-slabs ( 21 ) adjacent to both sides of these superficial grooves ( 15 , 17 ) that are arranged under them at an H 2 distance,
H 2 +H 3 is less than H/2 and the H 1 distance between tie bars ( 25 , 27 ; 26 , 28 ) and half the H thickness of the slabs ( 13 ) is of sufficient magnitude so that sub-slabs ( 21 ) can transmit negative bending moments between them
wherein the tie bars ( 26 , 28 ) are bars successively arranged on one side and then on the other side of superficial grooves ( 15 , 17 ); and
the slabs ( 13 ) form a convex curvature outside the sub-slabs ( 21 ) on which the load acts.
2. The pavement ( 11 ) according to claim 1 , wherein these tie bars ( 25 , 27 ) are bars arranged perpendicularly to these superficial grooves ( 15 , 17 ).
3. The pavement ( 11 ) according to claim 1 , wherein:
the surface of slabs ( 13 ) is between 2×2 m 2 and 25×25 m 2;
the surface of the sub-slabs ( 21 ) is between 0.4×0.4 m2 and 5×5 m2;
the H thickness of slabs ( 13 ) is between 6-80 cm.
4. The pavement ( 11 ) according to claim 1 , wherein the tie bars ( 26 , 28 ) are a sequence of semicircles whose inflection points are in the vertical plane of the superficial grooves ( 15 , 17 ) and alternated in relation to that plane.
5. The pavement according to claim 1 , wherein the length of the tie bars ( 26 , 28 ) ranges from 1.5 to 5 times the total length of their superficial groove ( 15 , 17 ).
6. The pavement ( 11 ) according to claim 1 , wherein said superficial grooves ( 15 , 17 ) are parallel to the edges of the slabs ( 13 ).
7. The pavement ( 11 ) according to claim 1 , wherein:
H 3 is between 5-25% of H;
H 2 is between 0-25% of H.
8. The pavement ( 11 ) according to any of claim 1 , wherein the tie bars ( 25 , 27 ; 26 , 28 ) are corrugated stainless steel bars.
9. The pavement ( 11 ) according to claim 8 , wherein the diameter of the tie bars ( 25 , 27 ; 26 , 28 ) is between 2-10 mm.