Before installing the ring ditch cover, it is essential to inspect the quality of the cover, particularly its strength class, to ensure it meets the design specifications. The cover should be free from cracks, chipped edges, honeycombing, pockmarks, and any straight seams in the middle. This ensures both structural integrity and a visually appealing finish.
A photo of an athletic field is provided below for reference:
During installation, the top surface of the wall must be cleaned and moistened to ensure proper adhesion. Two key aspects to control are the elevation and the alignment of the drainage holes on the cover plates. Proper elevation is crucial for smooth drainage across the entire plastic surface, while aligned drainage holes contribute to the overall aesthetics of the field. Therefore, it's important to establish an elevation control line during installation.
Each cover plate must be laid flat, with consistent elevation and firmly secured. After placing the first cover plate, another one should be installed every 10 meters as a direction control board. By pulling a line through the central drainage holes of these two plates, you can use this as a reference for midline control. If misalignment occurs, adjustments should be made carefully, ensuring that the centerline remains undisturbed. This process involves four continuous steps: positioning, adjusting, aligning, and maintaining accuracy throughout the installation.
The main focus during the installation of the ring ditch is on elevation and centerline alignment, which directly affect the functionality and visual appeal of the site. In addition, the installation must be stable, with tight joints and properly filled mortar. It is also important to clean the bottom of the trench before placing the cover plates to ensure a solid base.
Here are the quality requirements for the installation of prefabricated reinforced concrete covers:
Prefabricated Reinforced Concrete Cover Installation Quality Requirements
Project |
Allowable Deviation (mm) |
Test Frequency |
Testing Method |
Range |
Points |
Centerline Offset |
≤5 |
10m |
1 |
A small amount of thread |
Height Difference Between Two Adjacent Boards |
3 |
10m |
1 |
Using ruler |
Plate Bottom Wall Length |
±10 |
10m |
1 |
Use ruler |
Sheet Seam Filling Mortar |
Full |
10m |
1 |
Observed |
Note: The strength grade of the prefabricated reinforced concrete cover plate must meet the design requirements, and the appearance should be free from cracks, chipping, or other defects.
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