In wastewater systems, many manholes and special structures are required for inspection, control and merging. In our profile sewer pipe system, manholes and special structures with different functions are therefore available in polyethylene and polypropylene. Due to the excellent properties of these materials, the sewer pipes can be continuously welded. Different material properties, such as the reaction to settlements, are taken into account uniformly for the complete system.
PKS manholes usually consist of a polyethylene or polypropylene base and are supplemented with precast concrete parts according to DIN 4034 for further continuation to the ground level. The mounted reinforced concrete cover plate bears the
live loads directly into the manhole. The bottom part in contact with wastewater and groundwater is made of corrosion-resistant polyethylene or polypropylene. Depending on the load, the manhole can also be made entirely of PE 100 or PP-R. The manholes are provided with an access opening and mounted safety ladders.
PKS manholes provide for a heating coil welding socket as a spigot end, as well as a spigot end for direct connection to the PKS pipes. The design of the manhole is adapted to the specific requirements. Like the PKS pipes, the PKS manholes are characterized by a light-colored, inspection-friendly inner surface, low weight and very low roughness. For manholes with large traffic loads, the manhole should be provided with a reinforced concrete load distribution plate towards the top. The load distribution plate transfers the traffic loads into the ground so that the full axial forces are no longer acting on the shaft.
For sewers DN 500 to DN 800, the through manhole is used. Here, the full cross-section of the sewer pipe lies within the manhole. The entry shaft is: DN 1000 for PKS pipes DN 300 to DN 500, DN 1200 for PKS pipes DN 600 and DN 1500 for PKS pipes up to DN 800. The channel of the passage shaft is manufactured with a raised berm that is inclined to the pipe bottom and is safe to step on. The upper part of the shaft consists of the additional concrete structure such as a concrete cover plate and concrete rings. This allows individual adjustment to the subsequent ground level. The height of the manhole depends on the maximum groundwater level. In general, the transition from the PKS manhole to the concrete manhole rings should be above the groundwater level.
The PKS tangential manhole is used for larger sewers from DN 600. In the case of the tangential manhole, the sewer pipe is located outside the center axis of the manhole and below the manhole base. This makes it possible for the manhole to be uniformly designed in DN 1000. A load-bearing reinforced concrete cover plate is to be provided here as the top part of the manhole. The transition to the concrete cover plate should also be above the maximum groundwater level.
maximum groundwater level.
- Inspection chamber from DN 100 to DN 2400
- tangential manhole from DN 600 to DN 3500