If you already have a manhole cover, you must be familiar with it. All you have to do is to check and replace it regularly.
Then, you should be able to more fully consider how to install the manhole cover, a time-saving and labor-saving way. The effect is better after installation.
How should the inspection chambers be cleaned safely?
If you are a professional or have a manhole at home, you must know that if the manhole cover is damaged, debris on the manhole cover and road debris will fall into the manhole. If it is a drainage system, it will block the drainage system. If water flows into the pipe, it is difficult to clean up. Falling into the manhole, the narrow manhole is not conducive to quick cleaning with tools.
Therefore, the damaged manhole cover should be replaced in time. So we should consider an important issue. When installing a new manhole, pay attention to the debris of cement and other bricks falling into the manhole.
How to replace a destroyed manhole cover?
Before installing the manhole cover and derrick, determine the required load-bearing manhole cover and size.
When replacing the manhole cover, it is recommended not to use the old derrick, and the material around the old derrick should be removed. Insert the new derrick. The manhole frame is as easy to wear as the manhole. Before dismantling, it is recommended to spread some cloth or planks in the well to catch the falling debris. After the installation is complete, the debris can be removed easily and quickly.
Generally, the manhole is relatively heavy, and two people cooperate during dis-assembly to prevent injuries during dis-assembly and handling. When disassembling, we must first understand the width of the line and the bottom of the road. If it is a cement or asphalt pavement, it is necessary to destroy the original pavement and remove the base layer. The scope of removal must ensure that the original base can be removed and the new base can be installed. Then use the grip to cut off the road surface to make the cement or asphalt on the upper part of the base layer fall off. When breaking the well, cover the well to ensure that operators do not fall into the well and use tools safely.
How to install a new manhole cover?
1.It is necessary to measure the height of the manhole cover or brick, determine the reserved depth, and ensure that the manhole cover is flush with the road surface when the installation is completed.
2.Clean the dirt on the frame seat.
3.Lay sealing concrete in the valve seat area with a thickness of less than 40mm. If the base layer is made of bricks, it should be moistened with water in advance.
4.Put the frame on the concrete.
5.Hit with a mallet to make the frame level. Adjust the frame to the same height as the ground. When adjusting, use a wooden hammer to press down on the frame to ensure that the sealing concrete is evenly and firmly applied to the sealing area of the frame. Depending on the degree of inclination of the road, use wedges, hooks, or other systems that can maintain stability in the next stage to level it.
6.Clean up the spilled concrete from the edge of the opening in the frame fixing place.
7.Install the cover on the frame.
8.Pour concrete into the gap between the frames and dig a hole until the concrete is poured into the same level.
9.After the concrete is finally set, clean the installation site and maintain it for no less than 7 days before use.
During installation, the base must be kept flat and the manhole cover frame should be on the ground as a whole, and should be stable and not loose.
When adjusting, use a wooden hammer to press down on the frame to ensure that the sealing concrete is evenly and firmly applied to the sealing area of the frame.
If there are screw holes, use expansion bolts to fix the inspection manhole cover frame.
After covering the manhole cover, pay attention when sealing the surrounding with concrete or asphalt. Concrete or asphalt cannot stick in the gap of the manhole cover, nor can it directly cover a part of the manhole cover. Therefore, the manhole cover cannot be lifted later.