Underground storage facilities

Abstract

This product is an outer edge block for a facility that stores rainwater, wastewater, chemicals, etc., underground, constructed by connecting box-shaped blocks. The block is a box culvert with an arc-shaped inner bottom surface, and the top plate has an opening for management and an opening for a discharge adjustment device. The end of the box culvert that forms the outer edge of the storage facility is equipped with an integrated end wall. The inner surface of the end wall has a through hole for discharge at the center of the arc-shaped bottom, and the outer surface of the end wall has a groove positioned along the inner surface of the arc-shaped box culvert. The inner surface of the end wall has a concave notch on the end wall side of the central part of the arc-shaped bottom.

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