| 摘要 |
A manhole having a rustproof and waterproof steel pipe valve room is provided to extend length of a passage pipe easily and to increase work convenience by forming the passage pipe having upper and lower passage pipes detachably. A manhole having a rustproof and waterproof steel pipe valve room comprises a valve room(10), a passage pipe, and a manhole cover. Inner and outer surfaces of the valve room are coated with watertight/corrosion resistant paint. Inner and outer surfaces of the passage pipe are coated with the watertight/corrosion resistant paint. The manhole cover is mounted on the passage pipe. The valve room is bulged upward. The passage pipe has an upper passage pipe(21) and a lower passage pipe(22). The upper passage pipe has a plurality of upper combining pieces(21c'). The lower passage pipe has a plurality of lower combining pieces(22) corresponding to the upper combining pieces. |
