| 摘要 |
PROBLEM TO BE SOLVED: To provide an execution method for a septic tank securing necessary strength easily without requiring a number of working days when a plastic septic tank is installed under a parking place in a general household or the like. SOLUTION: The earth is dug from the surface of the earth 5 to a ground 1 with a predetermined depth and a foundation including broken stones 6 is formed on the ground 1. The foundation is provided with a form 13 raised in a range larger than that seen in a plan view, along the inner periphery of the foundation. Reinforcing bars 9 are laid on the foundation inside the form 13 and foundation slab concrete 8a is placed to a predetermined height. When the strength of the concrete exceeds a predetermined value, the septic tank 2 is mounted on the concrete, and further concrete 8b is placed along the outer periphery of the septic tank 2 to an upper limit 12 of a height on its side bottom (corner part), and then earth and sand are filled into a space around the septic tank 2. Thereafter, floor slab 4 is placed as a foundation for the parking place. COPYRIGHT: (C)2004,JPO
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