Installation method of ring groove cover in track and field field

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. A visually flawless cover ensures both durability and aesthetic appeal. When proceeding with the installation, the top surface of the wall must be cleaned thoroughly and slightly moistened. Two key aspects need careful control: the elevation of the undercover mortar and the cover plate itself. First, the elevation directly affects the smooth drainage of the entire field. Second, the drainage holes on the cover plates must align in a straight line, which is crucial for the overall appearance of the athletic field. Therefore, an elevation control line must be established during installation. Each cover plate should be laid flat, with consistent elevation and firmly placed. After installing the first cover plate, another one should be placed every 10 meters as a reference or direction control board. By pulling a line through the central drainage hole of two adjacent plates, you can establish a midline reference. If misalignment occurs, it must not be adjusted; instead, the centerline must remain intact. This process involves a continuous sequence of four steps: placing, adjusting, aligning, and ensuring no deviation from the intended path. The installation of the ring ditch primarily focuses on elevation and centerline alignment, both of which are critical for the functionality and visual appeal of the site. Additionally, the installation must be stable, with tight joints and fully filled mortar. It is also important to clean the bottom of the trench during installation to meet the required quality standards. The following table outlines 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 must meet the design requirements. The appearance should be free from cracks, chipping, and other defects. Ensuring high-quality materials and precise installation not only enhances the longevity of the structure but also contributes to the overall performance and visual harmony of the field.

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