| 摘要 |
PURPOSE: A manhole structure making inflow water as subsurface water is provided to prevent a drainpipe from being blocked and river pollution by installing a sedimentation tank, and a filtering device making the inflow water as the subsurface water. CONSTITUTION: A manhole structure making inflow water as subsurface water comprises a manhole, a sedimentation tank(11), an intermediate slab(14), a porous block, and a filtration mat(17) The inflow pipe(2) and the outflow pipe, or a facility pipe is connected to the manhole. The sedimentation tank sediments the soil and suspended materials between an inlet pipe and an outlet pipe and discharges the soil and suspended materials. The intermediate slab has a plurality of through-holes filled with filters(15). The inflow water is made as the subsurface water by the porous block. The filtration mat surrounds the side and the lower part of the porous block. |
