US Patent 10480150 Retaining wall method of precast block to prevent landslide

A precast H block (3) interlock each other to form sloping wall and similarly precast Y block (10) interlock each other to form straight wall, both block having a pin hole (4) through side walls. A wire rope (5) passing through said pin hole to make a wall strengthened by nailing horizontally (14) into the earth (8) adjacent to the block and vertically nailing (9) at top and bottom level. As well as wire rope (5) passing through said pin hole (4) of uppermost blocks, from underneath the road, to make a wall/barrier strengthened by nailing vertically (9) into the earth across the road (2).