| 摘要 |
PURPOSE: An expansion-type block system is provided to easily expand a road and a sidewalk using a small amount of manpower and to easily control the gradient of a support. CONSTITUTION: An expansion-type block system comprises an upper block(100), a lower block(200), first coupling members(300), and second coupling members. The upper block is composed of a flat plate part(110) and a pair of support walls(120,121). The support walls are protruded downward from the end of the flat plate part. The lower block is composed of a flat plate part(210) and a pillar part(220). The pillar part is protruded upward from the end of the flat plate part and is inserted into a housing groove(150) formed between the support walls. The first coupling members couple the pillar part to the support walls. The second coupling members couple the flat plate part of the lower block to the outer support wall and controls connection tension between the flat plate part of the lower block and the outer support wall. |
