| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a block capable of constructing a connected structure which enables positioning operation to be easily performed in the construction, which has high strength, and which does not tend to generate the outflow of sediment after the construction. Ž<P>SOLUTION: This block 10 is a concrete construction material of T-shape in plan view. A groove 11 for rotation and support is formed in the upper surface of an enlarged part 19 provided to the lower end of a T-shaped vertical portion 13. Projections 12a for rotation and support are formed on the lower surfaces of the right and left ends 12, 12 of a T-shaped horizontal portion 16, respectively. A partition wall 17 crossing the groove 11 is provided in the groove 11. The thickness and width 19w of the enlarged part 19 are larger than the thickness and width 13w of the T-shaped vertical portion 13. The partition wall 17 is formed at the longitudinal center of the groove 11. Guide surfaces 17a tilted in such a manner that the thickness of the partition wall is increased toward the bottom of the groove 11 are formed at the lower portions of both surfaces of the partition wall 17, respectively. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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