| 摘要 |
PURPOSE:To shorten the period of construction as well as to reduce the cost of construction by a method in which a underground water spring-fed tank leading to lengthwise and sidewise directions is built between a block with protruded legs set on the lower slab of an underground structure and the surface of the lower slab, and an upper slab is constructed on the flat board. CONSTITUTION:Plural concrete blocks 2 are set on the lower slab as a pressure- resistant board for the bottom of an underground structure A. In the block 2, a flat board 3 and a corrugated legs 4 are provided, and projections 5 are formed sidewards from the legs 4. The legs 4 are abutted against the upside of pressure- resistant board 1, blocks 2 are laid connectedly with the flat boards 3, and a spring-fed tank B as a space of flowing water is formed by the notches 6 and the apertures 7. Reinforcing bars 9 are set in all directions on the blocks 2, and concrete is placed to construct an upper slab 8. The period and cost of the construction work can thus be reduced without the needs to assemble and disassemble the formwork. |
