| 摘要 |
PURPOSE: A height adjustable manhole structure is provided to adjust the height of the upper side of a manhole cover corresponding to the height of the road surface and have a strong joint structure. CONSTITUTION: A height adjustable manhole structure comprises a manhole upper support(100), a manhole lower support(200) and a block member. A manhole cover(10) is mounted on the manhole upper support. A hollow(105) is formed on the center of the manhole upper support. The outer circumference of the manhole upper support is selectively locking-coupled on the inner circumference of the manhole lower support through a locking unit. The manhole lower support has a lower flange(220). The lower flange is fixed with the manhole underground structure. The block member is arranged outside the manhole upper support and the manhole lower support. The block member is piled up and combined through a piling unit to finish the outside. |
