| 摘要 |
PROBLEM TO BE SOLVED: To prevent a block main body and sheathing board from being damaged by providing connection means between the bracing part or enlargement part positioned at the outside of the bracing part in a manner holding the inside tip end of the bracing parts and sheating board, and thereby constructing the reinforcing structure of a retaining wall. SOLUTION: When an insertion groove 3 is formed at the tip end of the bracing part 2 of a blocking main body A and a sheating board B is inserted therein by the use of a cut groove 4 formed in a sheathing board B, an enlargement part 5 is made thicker than the bracing part 2 at the inside thereof. In addition, an appropriate enlargement part 6 is formed at the most tip end of the bracing part 2 in the parallel direction with a mirror board 1 and projecting left and right, so that a fastening state of the bracing boar B is stabilized by the enlargement 6. Following this, a connecting rod E is fitted in a continuous straight interstice D defined by a recess part 7 of the enlargement part 5, a communication groove 9, a penetration hole 13 of the bracing board B, a communication groove 10 and a recess part 8 of the enlargement part 6 to thereby be screwed in holes 11, 12, by bolts 24, 25, thereby accomplishing the firm fixing of the outside bracing part of enlargement part 6. Consequently, a fitting groove 3 and cut groove 4 are prevented from being cracked and destroyed.
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