Breathable plastic track, artificial turf soccer field, silicon PU stadium construction material supply

Polyurethane plastic runway is the mid-sixties to develop a new type of sports facilities. Was first manufactured by the Minnesota Mining and in 1961 with the laying of the first polyurethane plastic track, athletes achieved excellent results, since then, the sports community that: polyurethane plastic runway is one of the world's sports facilities and technological progress signs. In recent decades, as the world continues to improve the competitive level of the athletes and the competition results, the increasing intensity of competition, to help improve the performance of plastic race track technical requirements are also increasing, more and more stringent. Our application of plastic track late start. Until the seventies was successfully developed particulate plastic track, but twenty years there has been no significant progress. So far, in addition to the venue for international competitions, but more than 95% of the stadium runway it remains cinder track, is not conducive to daily training and competition level players play, and easy to pollute the sports environment. With the development of world sport, IAAF has recently clearly states: "Where the Olympic Games, World Championships, World Cup and the IAAF recognized in the game, will only be allowed to hold on the international standard synthetic track." National Sports Administration states: "The playground at least 10 years to be renovated once," faced with the upgrading of the national sports venues stage. In order to improve and promote the national fitness campaign athletic performance, to develop plastic track stadium will become China's transformation to a priority, but because of the quality movement sports ground is very high, its technical indicators is different from the road construction design specifications, And yet there is currently construction design specifications of the industry, therefore, ground motion designers and construction who proposed a new issue - how to design and construction of plastic sports venues. 1. Plastic sports ground grassroots structures and technical requirements in accordance with the requirements of domestic and international sports competition, the most commonly used plastic sports ground athletics, badminton, table tennis, tennis, volleyball and so on, but no matter what kind of sport, ground In addition to sports-related standards according to graphic design, but also meet the applicability, durability and economy requirements. Plastic sports ground domestic users are: educational institutions, sports systems, community facilities and so on, that is to say sports surface can be divided into professional and non-professional. Professional face grassroots movement demanding structure, generally referring to high-level local grass-roots approach road, just slightly adjust the thickness of the structural layer; non-professional sports ground grassroots general reference when roads grade highway design standards for design also make the appropriate adjustments to its structure thickness. Plastic sports ground by the drainage system level and structure of layers, while its structural layer structure layer and municipal roads is similar, both from the cushion, base course, surface layer. Plastic sports ground across the country, due to the varying climatic conditions of the country, geographical environment, material resources, different regions use different materials, different construction methods, but no matter what are designed to meet the requirements to achieve economic, durable for the purpose. In China's southern climate warm, moist, the new professional sports use of the original soil roadbed that is based on their place of drainage, rolling, digging, filling process, to meet the requirements of the degree of compaction of 95% after As a sports ground roadbed: more than 30cm thick cushion of graded gravel and stone chips 15cm thick cement stabilized layers: the base layer having a thickness of asphalt concrete particles and thickness of 4cm 6cm of asphalt concrete composed of fine particles. If the stadium is non-professional field, the thickness of asphalt concrete can be used 5cm and 3cm particles of fine particles; but also has to have to do with a non-modified bitumen oil to maintain stability. For the reconstruction of the sports venues visible condition of the original foundation stone chips directly laying cement stabilization layer and asphalt concrete base. In the northern part of our country, winter and summer temperature, and to prevent freeze-thaw damage. To create a new professional sports venues would be more than 20cm gray soil as roadbed; the northern land and resource characteristics of the physical environment, the choice of lime, fly ash and gravel together as a stadium cushion material, thickness set at 15cm-20cm: Similarly grassroots Chinese and fine layers of asphalt concrete composition, but whether or not the venue for professional, non-professional training ground asphalt concrete asphalt oil are commonly used to ensure that the plastic surface and grass-roots firmly affixed knot. For the reconstruction of the sports venues can be the basis of the original geotechnical rational use of post-test and then to reduce the thickness of the structure, reduce engineering costs. Because plastic sports face flatness, slope to show very strict, such as cross slope of the runway is not greater than 1: 100, the vertical gradient of not more than 1: 1000, horizontal gradient basketball, tennis is not greater than 1: 1000, the longitudinal slope not more than 1: 3000, etc., and the plastic surface layer is relatively thin (runway surface is 13mm, basketball scene layer is 8mm, tennis scene layer 3mm); flatness of all the sports ground with 3 m aluminum foot inspection to be in 3mm only within the scope of qualified, qualified rate of up to 95 per cent of the sports ground was qualified, thus increasing the technical difficulty on the basis of the construction process. 2. roadbed earthwork subgrade earthwork processing 2.1 is an important step of the first movement of ground-based projects, typically large projects, in the Old City area of ??underground pipelines more and more complicated, to do a variety of pipeline protection work, reasonable selection of construction machinery. 2.2 Check the water table, when high water table, roadbed and can not meet the minimum fill height requirements, you can set blind ditch and other methods to reduce the groundwater level based on soil characteristics. 2.3 subgrade soil pressure and humidity marshy area less than the required time, can be drying, for soil, lime and other methods to deal with set sand cushion and other measures to maintain the stability of the roadbed. 2.4 not use humus, garbage soil, silt, saline soil as permafrost blocks and fill using a mechanical filling should be stratified (virtual thickness 20-30cm) filling, layered leveling, rolling . 2.5 rolling work should be from the inside to the outside track, each general DRUM overlap 15-20cm, rolling about 5 to 8 times, to the surface without significant wheel tracks and reach the density of the required date. 3. lime cushion construction 3.1 of the regulator is to start rolling, rolling with eight tons must wheels from the inside to the outside of the front track uniform rolling big swing axis, by the regulator to remedy certain shortcomings dust inside and outside . 3.2 lime finishing time with more than 12 tons of roller were rolling, rolling from the inside to the outside of the runway 4 to 6 times, the same day rolling that day survived. 3.3 dust in 5-7 days after completion of rolling, must maintain a certain humidity, conducive to the formation strength, to avoid shrinkage cracking and loose phenomenon. Gray soil compacted thickness 3.4 to 1O ~ 20cm appropriate, rolling water content in order to "hand shape into groups, landing energy spread" for the degree, leveling process control "rather high not low, rather shovel do not fill" principle. 3.5 lime structure layer in a wet state must conserve more than seven days, the use of watering regimen. 4. lime, fly ash, sand and gravel mixture grassroots construction 4.1 lime, fly ash, sand and gravel mixture compacted thickness up to 20cm, minimum 10cm, when the mixture to a thickness greater than 20cm layered laying. First 4.2 with 6 to 8 tons when the pressure roller from the inside to the outside of the regulator runway one or two times, followed immediately Zhaobu, with 12 to 15 tons of pressure until no pavement compaction wheel tracks after leveling. 4.3 multi-paving, for the good combination of upper and lower levels, should be watering moist, dense holes and the upper layer of the lower layer compacted mixture. 4.4 compaction molding in a wet state of health, in general sprinkler maintenance for at least 7 days. 4.5 Mixture should mixing uniformity, color reconciled, gravel (crushed stone) maximum particle size of not more than 5Omm, greater than 20mm gray block does not exceed 10% of the non-lime containing undigested particles. 4.6 with 12 tons roller rolling wheel track depth can not be greater than 5mm, and may not have a floating material, peeling, loose phenomenon. 5. The stability layer of cement stone chips Construction 5.1 Note powder grading, accurate materials (cement, stone, water ratio, mix each well) before mixing equipment strict testing, so the ingredients accurately, mixing evenly. 5.2 stabilizing layer having a thickness of 150mm, a compaction molding using a paving, in order to ensure its effectiveness. After leveling with eight tons paving roller compaction, follow the "first light after the first outside of the medial, the first slow-fast" principle when rolling. 5.3 molding insurance to be certain humidity conservation, to facilitate the formation of strength, to avoid shrinkage cracks scattered threshing. 6. Construction of asphalt concrete layer laid preceded inspection 6.1 paver screed width and height, and adjust the automatic leveling device. Maximize the use of full-road width paving, such as the use of shunt web paving, Jiecha should close, straight, and to set the kind of control the thickness of the pile. 6.2 asphalt heating temperature 130-150 ℃, mixing temperature of 120-140 ℃. 6.3 Mixture access to the site to control the temperature of 120-130 ℃, paving temperature not lower than 110 ℃, start rolling temperature 80-100 ℃ appropriate. 6.4 to consider when loose laying paving coefficient, it is generally determined at the time of the test shop, which is 1.15 to 1.35. 6.5 paving asphalt to concrete visual inspection of asphalt oil content, mix temperature, thickness and apparent inspection. 6.6 good quality asphalt surface layer of concrete needed to ensure good compaction, compaction early partial pressure, complex pressure and final pressure three processes. First press temperature is generally 110-130 ℃, checking flatness, be trimmed if necessary after rolling; when re-pressed by roller or 10-12t 10-12t static role vibratory roller compacted 4-6 times to stabilize and no significant wheel tracks, complex pressure temperature should be controlled at 90-110 ℃; when the final pressure, static pressure with 6-8t vibratory roller 2-4 times the final pressure temperature should be controlled at 70 ~ 90 ℃. 6.7 RCC, to ensure that the roller wheel moist, avoid the adhesion of asphalt mixture. But also to prevent excessive watering, so as not to mix the surface is rapidly cooled. 6.8 roller is prohibited on the newly paved mix of emergency steering or U-turn, and move around the location or sudden brakes, new pavement layer before cooling to room temperature, any machinery, vehicles are allowed to park. 6.9 RCC quality checks. The main test items are: compaction, thickness, flatness. This project Press "Highway Engineering Quality Inspection and Evaluation Standards" Check. 6.10 reasonable control of compaction rate and improve the operation of high interest rates, the general control of 2-4km / h, to avoid steps out of line, increase rolling time, to avoid the phenomenon goes, transverse cracks. 6.11 Apparent density uniform appearance is required for some major deficiencies, such as lack of thickness, flatness bad, loose, oil spillage should be timely rework. 6.12 Early asphalt concrete curing process are not allowed to machinery, vehicles parked in the conservation period in the newly paved asphalt concrete surface layer; prohibited machinery, vehicles traveling in the newly paved asphalt concrete surface layer, brake and turn around. With the launching of the national emphasis on improving education and national fitness campaign, various types of plastic sports venues incremental annual demand, according to a preliminary forecast of the National Sports Authority statistics department, the next five years there will be more than 7.6 billion value of sports venues , this is to the majority of sports venues production and construction units to provide a broad space, the face of such a huge space for development, to make the stadium design and construction of standardized becoming urgent needs of the industry, so all of my colleagues in the industry To be strict control, strict, summary of construction experience, to work together, so that the revitalization of China's sports undertakings contribute!