| 摘要 |
PURPOSE: A manhole having conduit holes is provided to increase a durability and enhance sanitation by simply punching conduit holes on the bottom of the manhole where water is stagnated. CONSTITUTION: The manhole having conduit holes is provided to eliminate the sewage stagnated in the bottom by punching holes so that environmental problems arisen from the stagnated water such as decomposition or mosquito-ridden place are prevented. The manhole having conduit holes comprises an inner wall(12), an outer wall(13), and assembled water pipes(21). The manhole having conduit holes is reinforced by recesses(14) and anastomosis points(15), wherein the anastomosis points are punched to form holes. |
