Precast wall system

1. A retaining wall, comprising:

a plurality of stacked rows of precast retaining wall blocks, individual ones of the precast retaining wall blocks comprising a front surface, a top surface, a bottom surface, and an opening defined by internal walls between the top and bottom surfaces;

a geogrid material having a planar elongated body with first and second parts embedded in soil and a third part connecting the first and second parts and extending through the opening of at least one of the precast retaining wall blocks;

wherein the opening extends through a rear panel portion of the at least one of the precast retaining wall blocks, wherein the rear panel portion extends between a web portion extending outwardly from a rear surface of the front surface and an adjacent web portion of the at least one of the precast retaining wall blocks; and

wherein the web portion includes a vertical center portion extending from the top surface to the bottom surface of the front surface portion and left and right protrusions extending outwardly from lower sides of the vertical center portion, the left and right protrusions of the at least one of the wall blocks substantially triangular.

2. The retaining wall of claim 1 , wherein the opening comprises a vertical slot.

3. The retaining wall of claim 1 , wherein the geogrid material extends rearward beyond the rear panel portion of the at least one of the wall blocks.

4. The retaining wall of claim 1 , wherein at least a portion of a corner edge of the rear panel portion is curved.

5. The retaining wall of claim 1 , wherein at least a portion of a corner edge of the rear panel portion is rounded.

6. The retaining wall of claim 1 , wherein at least a portion of a corner edge of the rear panel portion is tapered.

7. The retaining wall of claim 1 , further comprising:

a first reinforcing bar extending within the front surface between left and right sides of the front surface; and

a second reinforcing bar extending through the opening of the rear panel portion, the second reinforcing bar configured to hook around the first reinforcing bar.

8. A precast retaining wall system comprising:

a first course including a retaining wall block comprising:

a front face portion including a front surface, a rear surface, a top surface, and a bottom surface;

at least one web portion extending outwardly from the rear surface of the front face portion, the at least one web portion including a vertical center portion extending from the top surface to the bottom surface of the front face portion and left and right protrusions extending outwardly from the lower sides of the vertical center portion, the left and right protrusions substantially triangular;

a rear panel portion including an opening defined by a plurality of internal walls between the top surface and the bottom surface extending through the rear panel portion, the rear panel portion extending between the at least one web portion and an adjacent web portion of an adjacent retaining wall block; and

a geogrid material extending outwardly from the rear panel through the opening, the geogrid material having a planar elongated body with first and second parts embedded in soil and a third part connecting the first and second parts and extending through the opening of the rear surface; and

a second course on top of the first course, the second course including a second retaining wall block comprising:

a front face portion including a front surface, a rear surface, a top surface, and a bottom surface;

at least one web portion extending outwardly from the rear surface of the front face portion, the at least one web portion including a vertical center portion extending from the top surface to the bottom surface of the front face portion and left and right protrusions extending outwardly from the lower sides of the vertical center portion, the left and right protrusions substantially triangular;

a rear panel portion including an opening defined by a plurality of internal walls between the top surface and the bottom surface extending through the rear panel portion, the rear panel portion extending between the at least one web portion and an adjacent web portion of an adjacent retaining wall block;

a geogrid material extending outwardly from the rear panel through the opening, the geogrid material having a planar elongated body with first and second parts embedded in soil and a third part connecting the first and second parts and extending through the opening of the rear surface; and

left and right aligning elements extending downwardly from a bottom surface of the left and right protrusions of the second retaining wall block, respectively, a front surface of each aligning element aligned with the rear surface of the front face portion of the respective protrusion, the left and right aligning elements defining an alignment seat engaged with a top portion of the at least one web portion of the first retaining wall block.

9. The precast retaining wall system of claim 8 , wherein the at least one web portion and the adjacent web portion of the first retaining wall block extend rearward through the opening and beyond the rear panel portion of the first retaining wall block.

10. The precast retaining wall system of claim 8 , further comprising a geogrid material extending through the opening of the first retaining wall block.

11. The precast retaining wall system of claim 8 , further comprising a geogrid material extending through the opening of the second retaining wall block.

12. The precast retaining wall system of claim 8 , wherein the front surface of at least one of the left and right aligning elements is engaged with the rear surface of the front face portion of the first retaining wall block.

13. The precast retaining wall system of claim 8 , wherein the second retaining block further comprises a soil nail connection secured in earth material behind the wall system.

14. The precast retaining wall system of claim 8 , wherein the second retaining wall block further comprises a traffic barrier.

15. The precast retaining wall system of claim 8 , further comprising a soil nail or earth anchor connecting a beamed connection to each material behind the precast retaining wall system.

16. A precast retaining wall block, configured for assembly into a retaining wall including a plurality of stacked rows of at least a plurality of said retaining wall blocks, said retaining wall block comprising:

a front face portion including a front surface, a rear surface, a top surface, and a bottom surface;

at least one web portion extending outwardly from the rear surface of the front face portion, the at least one web portion including a vertical center portion extending from the top surface to the bottom surface of the front face portion and left and right protrusions extending outwardly from the lower sides of the vertical center portion, the left and right protrusions substantially triangular;

a rear panel portion extending between the at least one web portion and an adjacent web portion of the retaining wall block, wherein the rear panel portion includes an opening extending through the rear panel portion; and

a geogrid material having left and right aligning elements extending downwardly from a bottom surface of the left and right protrusions, respectively, a front surface of each aligning element aligned with the rear surface of the front face portion and extending rearward along at least a portion of the respective protrusion, the left and right aligning elements defining an alignment seat configured to engage a top portion of a web portion of a retaining wall block in a lower row of the retaining wall.

17. The precast retaining wall block of claim 15 , further comprising a geogrid material extending through the opening of the first retaining wall block.