JP2566197B

PURPOSE:To improve the workability, by fluidizing sand and soil under a movable slab and discharging the sand and soil upward and lowering the movable slab and after fixing it at a specified position, constructing a slab by use of a form on the movable by and repeating this process. CONSTITUTION:Sand and soil under a movable slab 5 is fluidized toy a fluidizing device 8 of sand and soil and discharged to the upper side of the movable slab 5 by a suction device 9 of mud. The movable slab 5 is lowered by the own weight to excavate the ground further. The movable slab 5 is suspended at a specified position and lowering and excavating motions are stopped and a jack 6 is stretched ad the movable slab 5 is fixed between earth retaining walls 1a, 1b. Next, a form 12 to construct a slab is installed on the movable slab 5 through a form support 13 and reinforcements are arranged and concrete is placed to construct an upper slab floor US. After curing of the slab US, the jack is retracted and the same processes are repeated to construct slabs of respective lower floors. Moreover, a foundation is constructed, the movable slab is buried, and temporary structures are removed In this way, the cost is reduced with automation and the construction can be safety carried out.