| 摘要 |
PROBLEM TO BE SOLVED: To provide a drain pipe for a pavement, which has excellent durability and rigidity, and can facilitate handling, improve execution of construction and recycle pavement material by constructing the drain pipe by a coil formed into a continuous spiral shape from a synthetic resin linear body. SOLUTION: The line diameter of a synthetic resin linear body constituting a synthetic resin-made coil 1 is set at least 1 mm, especially 2 to 3 mm. As a coil for a drain pipe 10 for a pavement, suitable hardness, strength and compressive stress are secured. As a synthetic resin linear body constituting the synthetic resin-made coil 1, one of a single line, a twisting line and a stranded line is used, and a circular section or a deformed section of the synthetic resin linear body is selected to suitably control rigidity, compressive stress, flexibility and penetration of rainwater of the coil. The synthetic resin-made coil 1 has many loops spirally arranged by suitable pitches, thereby supporting the upper pavement surface to disperse the pressing force of the pavement surface and prevent local concentration.
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