| 摘要 |
PURPOSE:To obtain a completely water-proof basement by a method in which a synthetic rubber bag formed by a high-frequency bonding method is inserted into an excavated hole, wooden or steel bottom plate is placed on the bottom of the bag, steel side walls are erected on the bottom plate, and a steel or wood cover plate with a manhole is placed on the side walls. CONSTITUTION:Loosened portions 2 are formed in the upper peripheral edge corners of a synthetic rubber bag 1 formed into a box shape by a high-frequency bonding method in a factory, fitting clothes 3 are bonded at given intervals to the upper peripheral edge sides of the bag 1. The bag 1 is inserted into an excavated hole of the same volume as the bag 1, a steel or wood bottom plate 4 is placed on the inside bottom of the bag 1, side walls of steel frames 5 are placed on the bottom plate 4, and a steel or wood cover plate 8 is placed on the side walls and a manhole 7 is drilled in the cover plate 8. The surrounding area of the excavated hole is refilled with soil. A basement of a completely water- proofing effect can thus be constructed at low cost in a short period with good efficiency.
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