I. What to watch out for when building a tennis court facility There are also many facilities for tennis competition venues, each of which should be constructed in the manner specified in the design documents. 1. The construction of the net base of the game, the net in the tennis court needs two net columns to support, because the foundation of the net pillar is not deep enough and the width is not enough, because the net strength is too large, the net pillar is often connected or tilted. Base cracking, rainwater pouring, frost heaving in winter, destroying a very good site, combined with previous experiences of post construction can be seen in Figure 5.8. Contest rules, singles net length is 10.06m, doubles net length is 12.80m, net column The buried distance can not be less than these two values, and it can be replaced by a pair of double-stranded net posts, which can also replace the single-stranded net posts, but in the game, the standard posts should be placed in the position of the single net posts. 2. A fence is to be built around the site. The fence is composed of steel pipe columns and wire mesh. The mesh is 5cmx5cm, the color is green or blue, the fence height is 4~6m, and the fence column depth is not less than 0.7m. The C20 cement is used. Concrete watering. Around the tennis court, if there is no steel fence but a hard wall, a wall hanging net is required during the competition. The protection net is a soft woven fabric with a net height of 2.5 m and a net length of no less than 20 m. The color is green or blue. II. Checking the wet conditions of the asphalt concrete base Polyurethane plastic surface materials, laid on top of asphalt concrete base, require a very strong bond. However, polyurethane materials are afraid of water and moisture. Once the asphalt concrete contains moisture, after the plastics are paved, bubbles will be generated in a short time, and the plastic and asphalt concrete will separate. As the temperature changes, small bubbles will come. The larger, sometimes up to 1m2, and sometimes more and more bubbles, as small as 3cm in diameter, due to the creation of bubbles, resulting in a large area of ​​renovation, small stadium even scrapped, mainly due to the presence of moisture in the asphalt concrete base layer. In order to prevent the appearance of air bubbles, we must check the moisture phenomenon of the base layer before laying the plastic surface layer. At present, there is no advanced electronic instrument testing. Now introduce two methods: one is closed inspection box method, which is made of organic glass box 40cmx40cmx5cm, adhesive seal airtight, leaving a 40cmx40cm side, the opening facing the asphalt concrete base, the surrounding plasticine available Temporarily closed. After 24 hours, check whether there is moisture vapor in the box. If not, you can think that the grass is dry and you can shop for plastic. Another method is to use a plastic film, the area is greater than 50cmx50cm, flat on the asphalt concrete substrate, the perimeter is tight with sand, a circle of four small bricks, after 24h, the plastic film appears steam bubbles In that case, it means that the asphalt concrete contains moisture and it is not easy to pave the plastic surface layer. If there is no moisture, it is considered that the asphalt concrete base layer is dry and the plastic surface layer can be laid. Industrial Disposable Wipes,Screen Cleaning Wipes,Lens Cleaning Wipes,Anti Static Industrial Wipes Miraclean Technology Co., Ltd. , https://www.mrccleanroom.com