| 摘要 |
PROBLEM TO BE SOLVED: To provide a retaining material which configures a retention and infiltration facility to be buried underground, can reduce the number of components and enables an arrangement direction and an installation posture thereof to be finely adjusted.SOLUTION: A retaining material 10 has: a first engaging section 30 integrated with a front wall of a bottom plate 20; and a second engaging section integrated with a rear wall of the bottom plate 20. The first engaging section 30 has: an extension portion which is outwardly extended; and a first stopper portion which is arranged at a tip of the extension portion and has a width wider than the extension portion. The second engaging section has: an engaging hole with a width larger than the extension portion but smaller than the first stopper portion; and a second stopper portion which is arranged at the back of the engaging hole and positioned opposite to the first stopper portion of a neighboring retaining material with a clearance when the retaining material is connected to the neighboring retaining material so as to be closest to each other. |
