The construction methods of the softball courts can refer to the relevant parts of the construction of the baseball stadiums of the Thompson. However, due to changes in the size of the softball courts according to the requirements of the competition rules, there are changes in the men, women, adult groups, and youth groups. In the field, in principle, it should be built in the largest size, otherwise the use of small-scale competitions will be limited.
Soil site construction, the most important is the compaction work, each layer of construction must be under the requirements of the design documents, after paving and leveling, rolling with a roller compactor to achieve the best compactness. Rolling under dry conditions is not allowed, and rolling under excessive humidity is not allowed. Frothing is not allowed.
When the competition uses soil sites for construction, it should be completed at one time. It is best not to divide into many small blocks, so as to prevent cross rolling and inconsistent rolling. The rollers should walk from one end of the infield to the other, and after the rolling is completed, the rollers will be horizontal. Rolled from one end to the other, forming a vertical cross-rolling. In the flatness control method, a 5mx5m square grid control method should be adopted from the beginning to the end, which is the only effective method for the construction measurement of sports grounds.
The surface material of the soil site should be dominated by artificially treated soil. The method of treatment is preferably after sintering, then crushing, and then screening, mixing sand, clay soil and other materials. According to the use requirements, adding salt additives, curing agents and other materials, and finally determine a reasonable mix, the amount of various additives, salt dosage should be controlled at about 10%. In short, it must be determined experimentally. In recent years, the use of color materials in the soil of some venues to increase the color of the soil and achieve good-looking purposes is undesirable. Because this will cause athletes to get in touch with soil, the clothing packs will be stained, and serious athletes' skin will be dyed with different colors. This is strictly prohibited.
Teaching Interactive Whiteboard
The use of high-efficiency multimedia teaching Interactive Whiteboard in education will not only improve the teaching efficiency of the school, but also improve the teacher's ability to guide students correctly, and teaching smart whiteboard can let teacher spend time in effective places instead of wasting ineffective things. The intelligent touch teaching all-in-one machine gives teachers more room for expression. The teaching smart digital board belongs to the teaching market, and the teaching interactive smart board market has been growing rapidly since the end of 2015.
Teaching Interactive Smart Board,Teaching All-In-One Machine,Teaching Smart Digital Board,Teaching Smart Whiteboard
Guangdong Zecheng Intelligent Technology Co., Ltd , https://www.zecheng.com