SEPTIC TANK INSTALLATION STRUCTURE

PROBLEM TO BE SOLVED: To provide a septic tank installation structure where both of the lower slab and supports in a burying construction work for a septic tank are made precast ones, and the stable erection of the supports is made possible while enjoying the reduction in the term of the construction work and the simplification of the operation as the advantages thereof. SOLUTION: The septic tank installation structure has a constitution where supports 3 erected from the lower slab 1 mounted with a septic tank 4 are formed by precast concrete, further, the lower slab is formed by a plurality of unit precast concrete plates 1a, each unit precast concrete plate is provided with a support erecting hole 8, the support erecting hole is formed by an upper hole part 8a defined by a support erecting boss 9 made of concrete integrated with the plate which is erected from the upper face of the unit precast concrete plate, and a bottomed lower hole part 8b recessed within the thickness of the unit precast concrete plate, or formed by the above upper hole part, the lower edge of the support is erected into the support erecting hole, and the upper slab 2 is supported by the upper edge thereof. COPYRIGHT: (C)2011,JPO&INPIT