| 摘要 |
PROBLEM TO BE SOLVED: To provide a connectable concrete block capable of being stably laid down on a road by fitting adjacent blocks to each other even if the road has unevenness, slope, twist, curve, or the like. SOLUTION: Concrete blocks 100 are disposed so that the side surfaces face each other and constitute a compartment or a boundary. The concrete block 100 includes a projection 10 which is formed on one side-surface 70 and the front end of which is formed in a generally semi-spherical convex shape, and a generally semi-spherical concave recess 20 which is formed in the other side-surface 80 on the opposite side of the one side-surface 70. The distance between the one side-surface 70 and the highest part of the projection 10 is longer than the distance between the other side-surface 80 and the deepest part of the recess 20. COPYRIGHT: (C)2011,JPO&INPIT
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