| 摘要 |
The present invention relates to a waterproof manhole structure and, more specifically, to a waterproof manhole structure which is composed of a sealing packing with excellent durability, which has excellent watertightness, and which is easy to process. The waterproof manhole structure combines the sealing packing with a cover and a support by inserting the sealing packing in between the cover and the support. The support has a connection groove formed upwardly on the inner surface of a body; the connection groove has support protrusion and hanging pieces formed in multiple stages on the inner surface thereof, and a circular packing combined and fixed thereon; the cover is combined with top of the support, and has a pressurizing unit formed on the lower end of a downward body of the cover and placed on the upper end of the packing; and therefore, the packing is compressed by self-load and a pressurizing force, thereby effectively sealing the connection part between the support and the cover. |
