| 摘要 |
PROBLEM TO BE SOLVED: To connect to an inflow pipe or an outflow pipe of a large diameter pipe, while having sufficient strength and durability.SOLUTION: A concrete reinforcement member 10 used by being replaced with at least two assemblies adjacent in a top view among a plurality of plastic assemblies 21 for constituting a rainwater storage permeation structure 20, is a reinforcement member formed in a hollow square cylindrical shape and having an opening part for conducting water to the adjacent assemblies. The reinforcement member may be constituted by laminating a plurality of block bodies, and the plurality of block bodies may also include a straight wall block body 11e for opening an upper surface and a bottom surface. An inspection port may also be provided on the upper surface, and a stepping sash bar (a step 15) may also be provided on the inner wall. One side surface is provided with a pipe connection part 13 for connecting an inflow pipe or an outflow pipe, and a diameter of this pipe connection part is set larger than usual, and thereby, can be connected to the inflow pipe or the outflow pipe of a large diameter.SELECTED DRAWING: Figure 1 |
