The precautions during the construction of tennis court facilities

I. Key Considerations When Building a Tennis Court Facility

When constructing a tennis court, it's essential to follow the specifications outlined in the design documents. There are various types of facilities for tennis competitions, and each must be built according to strict guidelines to ensure safety, durability, and compliance with tournament rules. 1. **Net Base Construction** A tennis court requires two net posts to support the net. If the foundation of these posts is not deep or wide enough, or if the net tension is too high, the posts may shift, tilt, or even crack over time. This can lead to water infiltration during rain, frost heaving in winter, and ultimately damage the playing surface. As shown in Figure 5.8, improper installation can cause significant issues after construction. According to the official rules, the singles net should be 10.06 meters long, while the doubles net should be 12.80 meters. The distance between the net posts must not be less than these measurements. In some cases, double-stranded net posts can be used as an alternative to single-stranded ones, but the standard single net posts must be placed in their correct positions during matches.

2. **Fencing Requirements** A fence should be installed around the tennis court for safety and boundary control. The fence is typically made of steel pipe columns and wire mesh with a 5cm x 5cm mesh size. It should be green or blue in color, with a height ranging from 4 to 6 meters. The depth of the fence posts should be at least 0.7 meters, and the concrete used should be C20 grade. If there is no steel fence, and instead a hard wall surrounds the court, a wall-hanging net is required during competitions. This soft woven fabric net should be 2.5 meters high and at least 20 meters long, also in green or blue. It serves as a protective barrier to prevent balls from leaving the court.

II. Checking the Moisture Condition of the Asphalt Concrete Base

Polyurethane plastic surfaces are commonly used for tennis courts and are laid on top of an asphalt concrete base. However, polyurethane materials are highly sensitive to moisture. If the asphalt base contains any residual water, bubbles will form quickly after the plastic is applied. These bubbles can grow over time due to temperature changes, leading to large areas of separation between the plastic and the base. In severe cases, this can result in major repairs or even the complete replacement of the surface, especially in smaller courts. The primary cause of such issues is the presence of moisture in the asphalt base layer. To prevent this, it’s crucial to check the moisture level of the base before applying the plastic surface. Currently, there are no advanced electronic tools available for this task. Two simple methods are commonly used: - **Closed Inspection Box Method**: A transparent acrylic box measuring 40cm x 40cm x 5cm is sealed airtight, with one side left open to face the asphalt surface. Plasticine is used to temporarily seal the opening. After 24 hours, if no moisture vapor is visible inside the box, the base is considered dry and ready for the plastic layer. - **Plastic Film Test**: A piece of plastic film larger than 50cm x 50cm is placed flat on the asphalt base. The edges are tightly sealed with sand and held in place with four small bricks. After 24 hours, if steam bubbles appear under the film, it indicates that the base is moist and not suitable for the plastic layer. If no bubbles form, the base is dry and can proceed with the surface application. By following these checks, you can significantly reduce the risk of future damage and ensure a long-lasting, high-quality tennis court.

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