Patent ID: 8186907
Filing Date: 2012-05-29
Classification: E01C

Abstract:
1. A method of lifting and leveling a slab by using compressed air to lift said slab and dried sand to stabilize and hold said slab in a desired position said method comprising the steps of: supplying a sand storage tank filled with a well dried mason's sand said storage tank having a sand outlet; supplying a compressed air source in fluid tight connection with said sand outlet; mixing said sand and said compressed air in a mixing chamber; delivering said sand and air mixture to an injector gun via an elongate fluid tight hose said gun further having a gun nozzle; drilling a hole in said slab to be leveled; attaching said gun nozzle to said drilled hole; operating said injector gun in bursts so as to provide compressed air and sand; lifting with air pressure, momentarily, said slab to a height above the desired final level with the compressed air supplied by said bursts, such that a settle cavity filled with compressed air sufficient to raise said slab above the ground is created between said slab and said ground until said compressed air escapes from said settle cavity allowing said slab to drop back in contact with said ground such that said slab is supported by said ground and said sand; leveling said ground with said well dried mason's sand carried by said compressed air in said burst such that said well dried mason's sand may move freely within said settle cavity momentarily created by said compressed air; and repeating said lifting and leveling steps until said slab is at the desired level and resting upon said well dried mason's sand.