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 corners, honeycombing, pockmarks, and any straight seams in the middle. This step is crucial to guarantee the structural integrity and durability of the final installation.
During the installation process, the top surface of the wall must be cleaned thoroughly and moistened before applying the mortar. Two key aspects need careful control: the elevation of the cover plate and the alignment of the drainage holes. The elevation directly affects the smooth drainage of water across the entire field, while the straightness of the drainage holes ensures a neat and professional appearance. After installation, all drainage holes should be aligned in a straight line, which is important for both functionality and aesthetics. To achieve this, an elevation control line must be established during installation. Each cover plate should be laid flat, with consistent elevation and firmly placed. Once the first cover plate is installed, another one should be placed every 10 meters as a reference or direction control board. By using the middle drainage hole of two adjacent plates, a reference line can be pulled to guide the midline alignment. If misalignment occurs, it should not be adjusted arbitrarily, as the centerline must remain intact throughout the process. In practice, this involves a continuous sequence of four steps: placing, adjusting, aligning, and ensuring the centerline remains accurate. Any deviation in the cover plate's position should be minimized, regardless of the construction flow.
The main focus during the installation of the ring ditch is on proper elevation and centerline alignment, which are critical for both the usability 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 specific 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. The surface should be free from cracks, chipping, or other defects to ensure long-term performance and safety.
Traffic signs are road facilities that use words or symbols to convey guidance, restriction, warning or indication information. In traffic signs, it is usually an important measure to implement traffic management and ensure road traffic safety and smoothness by setting eye-catching, clear and bright traffic signs.There are many types of traffic signs, which can be divided into main signs and auxiliary signs in various ways.Movable marks and fixed marks;Lighting signs, luminescent signs and reflective signs;And variable information signs that reflect the changing driving environment.
Road Sign Boards,Road Sign Traffic,Warning Traffic Sign,Aluminum Traffic Sign
Chengdu GodShape Sign Co., Ltd , https://www.signsgs.com