1. The total length of the standard runway is 400 meters, and it should be composed of two parallel straight roads and two bends with equal radius. Except for the grass runway, the inside of the runway should be delimited by a flange made of suitable materials. The flange is about 5 cm high and at least 5 cm wide. ?
2. The length of the runway shall be measured from the outer edge of the protruding edge in the runway at 30cm. If there is no protruding edge, it should be measured 20 cm away from the outer edge of the marking line.
For track events of 3.400 meters and below, each athlete should have a lane with a minimum lane width of 1.22 meters and a maximum lane width of 1.25 meters. The lane width is 5 cm, and all lanes should be the same.
4. The construction of plastic runway is based on asphalt or cement, and the basic practice is basically the same as road construction. The foundation surface is required to be smooth to ensure the uniform thickness and elasticity of the plastic surface. The quality requirements of the foundation are as follows:
5. Slope: horizontal < 1% (bend 8‰, straight 5‰, semicircle 5‰), vertical < 1‰, high jump area.
6. Smoothness: the pass rate of flatness is over 95%, and the error of 3m straightedge is 3mm.
7. Positioning: In order to meet the needs of accurate construction and line drawing, the four semicircle tangent points and two center points of the runway site should be marked with firm and clear marks.
8. Drainage: Two hours after the rainstorm, the drainage system must drain the accumulated water. In frozen areas, it is best to add a geotextile buffer layer between asphalt layer and gravel layer. Special waterproof treatment should be done along the drainage ditch foundation.
9. Strength and stability: The foundation should have certain strength and stability, with uniform and solid surface, no cracks and rotten edges, and straight and smooth joints. The cushion is compacted, and the compactness is over 95%. After the medium-sized roller is rolled, there are no obvious wheel tracks, loose floating soil, waves and other phenomena.
(2) Introduction of plastic runway materials:
1, breathable plastic runway
Special breathable structure: it won't bubble, and the bottom layer is made of American APT company's single liquid PU adhesive combined with elastic rubber particles, which has breathable function. At high temperature, the steam generated by the foundation will be quickly emitted through the pores. Steam pressure can't accumulate, so it won't bubble, especially in wet and rainy areas.
The breathable plastic runway is provided with:
Weather resistance: excellent weather resistance, not easy to age, not blistering due to weather influence.
Anti-ultraviolet: the surface layer is made of colored EPDM rubber particles, which has strong anti-ultraviolet ability and makes the runway free from fading.
Environmental protection: different from the traditional runway, it is non-toxic and tasteless even in the scorching sun, which is conducive to maintaining the surrounding environment and health.
2. Composite plastic runway
Weather resistance: the rubber particles on the surface adopt embedded structure to ensure that the runway system has excellent weather resistance and nail shoe damage resistance.
Smoothness: professional self-supporting machinery is used for construction, and the surface is seamless and smoother.
Anti-ultraviolet: EPDM particles and polyurethane glue are used as materials.
Anti-ultraviolet: the surface layer is made of colored EPDM rubber particles, which has strong anti-ultraviolet ability and makes the runway free from fading.
Environmental protection: different from the traditional runway, it is non-toxic and tasteless even in the scorching sun, which is conducive to maintaining the surrounding environment and health.
3. Prefabricated plastic runway
Specialty: Combining sports science and material science, adopting factory prefabrication technology can fully meet and reflect the professional requirements of athletes and competitors for track and field, and completely pass the physical and chemical performance index test of track and field track by IAAF.
Safety: The unique convex surface and concave bottom design provide a suitable impact absorption and energy feedback system, which can effectively improve sports performance and ensure sports safety.
Environmental protection: toxic and harmful substances are abandoned in the materials, and the physical and mental health of sports participants is really considered; Super-long warranty and secondary renovation design can prolong the service life of products and save the earth's resources; As a manufacturer, we guarantee the recovery and resource reuse after the service life expires.
Excellent weather resistance: it has good acid rain resistance, alkali resistance, ultraviolet resistance and mildew resistance under normal climatic conditions, and can meet the anti-skid performance required by professional competitions under wet conditions and even under bad climatic conditions (such as low temperature, plateau climate, high ultraviolet area, etc.). ), but also has excellent sports performance.
Economical and durable: cost-effective, it can bring the greatest return to the investment of sports venues, and the solid structure ensures the high-frequency use of products in universities, primary and secondary schools.
Multicolor effect: Non-dazzling multi-tone adds to the beauty of the playground and brings pleasant physical and mental experience to participants.
Maintenance-free: no threshing and chip dropping, with certain self-cleaning performance. The marking is always new, so it only needs daily cleaning without professional maintenance.
4. Mixed plastic runway
It is a runway system which is composed of polyurethane and black rubber particles in a certain proportion. The materials are transported to the site, mixed according to a certain proportion, mixed with catalyst, paved and vulcanized at room temperature. The surface layer is the only plastic surface layer material with national standards, which is mainly used in professional competition venues.
Extended data:
Plastic track, also known as all-weather track and track track, consists of polyurethane prepolymer, mixed polyether, waste tire rubber, EPDM rubber particles or polyurethane particles, pigments, additives and fillers. Plastic track has the characteristics of good flatness, high compressive strength, suitable hardness and elasticity, and stable physical properties, which is beneficial to the development of athletes' speed and skills, effectively improving sports performance and reducing the fall rate. The plastic track is made of polyurethane rubber and other materials, which has certain elasticity and color, ultraviolet resistance and aging resistance. It is internationally recognized as the best all-weather outdoor sports ground material.
References:
Plastic runway _ Baidu Encyclopedia