How is the nodular manhole cover replaced?
2019-12-19 http://fisherbuses.com/news/393.html Ductile manhole covers
are often seen by us. It has a lot of functions, beautifying our city, ensuring the normal traffic of our vehicles and pedestrians, etc. Then there will be many unqualified manhole covers, which requires us to replace them. How to replace it? Let's introduce it in detail below.
First, the manhole cover to be replaced and the surrounding asphalt or concrete pavement must be removed. The area to be removed is 1.5 × 1.5 meters and the depth is 20cm. The concrete conditioning ring is installed, and the concrete conditioning rings of different heights are fixed on the top of the well as required. Make sure the space between the top of the concrete conditioning ring and the elevation of the road is 12-15cm. Place limit wells, and place the device limit wells into the concrete conditioning ring to ensure that the height of the device limit wells is the same as the road surface. In order to ensure that the manhole cover can be properly installed in place, it is necessary to ensure that the bottom of the device limit well circle is in the orientation of being enveloped in the conditioning ring. Fill the asphalt. Pour an appropriate amount of emulsified asphalt on the surface of the operating surface, and then fill the operating surface with asphalt. Tamp the asphalt. The layer is filled with asphalt, and the layer is 5cm. Each time it is filled, it is tamped with a dynamic compactor.
The above content is some of the relevant knowledge of the ductile manhole cover we introduced to you. Through our introduction, we have a certain understanding of the replacement of the manhole cover. We must strictly follow the above requirements when performing the replacement to ensure that our future Normal application.