| 摘要 |
PURPOSE:To maintain serviceable the original characteristic of a group of top-shaped concrete blocks by preventing the top-shaped concrete blocks and an inter-block gravel layer from integrally conglomerating, with such air-gap holding layers such as a gravel layer, a sand layer, etc. each with a constant thickness provided on a flat upper plate furnished over the tops of parallely arranged top-shaped concrete blocks. CONSTITUTION:Each top-shaped concrete block 4 comprises a lifting hook 4d, a flat upper plate 4a a cone or a square conical body 4b, and a columnar shaft leg 4c, wherein a plurality of said concrete blocks are parallely arranged, and the individual blocks are connected with one another, using a lower portion coupling member 3 and upper portion coupling members 5a and 5b, wherein an air-gap holding layer 6 comprising a gravel layer, a sand layer, etc., each having a constant thickness is provided on a flat upper plate 4a over the tops of said blocks, followed by placing levelling concrete over the air-gap holding layer so that the air gaps and components contained therein will absorb cement milk from the levelling concrete, thereby an inter-block gravel layer 8 is prevented from soaking cement milk, whereby the top-shaped concrete blocks and the inter-block gravel layer are prevented from integrally conglomerating, with the original fine characteristic of a group of these blocks maintained serviceable. |
