First, the gate stadium construction
(a) Construction of the Sand Gate Stadium
Sand Gate Stadium is generally composed of a base layer and a surface layer.
1. Requirements for the foundation cushion: In order to prevent training and competition from rain, the venue must have good permeability and drainage performance. Therefore, the materials used for cushioning should be made of materials with good permeability and elasticity, and generally Using slag, the laying thickness is generally 10-15 cm, laid in two layers, coarse grains in the next, on the fine grain. The laying of the base layer, the use of materials, requires good drainage performance and a certain degree of strength, and more use of stone, block stone, pebbles, gravel, pebbles laid on top, the thickness of the paving, according to the different conditions of the terrain .
2, surface layer: composed of mixed soil, the thickness of 10-12 cm after compaction is appropriate.
3. Specific operational requirements: There are generally six processes for building a gateball court. (composed of 6 layers of material)
(1) Natural grass-roots level: It is required to consolidate and level the natural grass-roots land. It is required to be compacted and leveled. It must not be dug foundations and be backfilled.
(2) Pieces of stone: When placing a piece of stone, the tip of the stone is pointed downwards and the plane is upwards. There is a gap underneath and the water flows, with a thickness of 10-15 cm.
(3) Crushed stone: It mainly plays the role of blank filling. Thickness 10-15 cm.
(4) Slag layer: Mainly filled and leveled. The coarse particles are on the bottom and the fine particles are on the top so that the isolation layer is smooth. Thickness 10-15 cm.
(5) Separator Material: River sand, which is convenient for renovating the surface layer. Thickness 2 cm.
(6) Surface layer: Formula for mixed soil: 1, 65-70% for sandy soil components; 2. 20% for ash components; 3, lime components 6-10. Thickness 8-10 cm.
4. Several problems need to be paid attention to when building a gate stadium in Saudi Arabia:
(1) Gate stadium ground slope treatment: The slope of the stadium surface layer must be solved in the construction of the grass-roots cushion. The cushion slope must conform to the slope of the ball scene. Otherwise, it is difficult to meet the requirements of surface slope design and site drainage. The combination of percolation and percolation is used to deal with platoons. The clear water flows into the annular drainage ditch. The drainage gradient of the gateball court should not be too large, generally by 1/100.
(2) Drainage blind ditch under the ball cushion: how to set up blind ditch, according to site area and direction, main road and branch road can be established. The distance between blind ditch should not be more than 10cm, and the slope in the ditch should not be less than 5%. , The site drains into the drainage system.
The structure of blind ditch is mostly filled with materials with good water permeability, generally suitable for use of block stones, gravel, etc., and paving should be done with pebbles at the bottom with large stones (pointed down, flat top up). Flat, filled with slag. As shown below:
5, the maintenance of the gateball field
Due to the practice of strokes and the strokes in the game, the ball was stepped onto the site to make it rugged. Depending on the use of the site, sand should be spread in 3 days or a week, and then flattened with sacks to keep the site hard and flat.
(b) Construction of artificial turf gateball court (omitted)
Second, the planning of the gateball court and the drawing method of the standard gateball court (geometric drawing method)
How to use the most simple and quick method to draw a more accurate and standardized gateball court. Should be considered from the following aspects:
(a) The necessary conditions for painting a gateball court
1, the venue. A piece of sandy land, a meadow or artificial turf.
2, tools. More than 30 meters tape measure (steel tape), steel drill (steel needle, used to draw line fixed point)
(b) Geometry drawing
1, first determine a baseline (or called an edge), the length of the baseline depends on the number of sites required. If you have a site, determine a 20-meter baseline. Four blocks are more than 90 meters long; then every 20 meters one point leaves a certain distance between two points. An edge of this required site is also determined.
Here's an example of drawing a venue:
2. Take the two endpoints 1 and 2 of the edge of 20 meters as the center of the circle and draw arcs with radius of 15 meters and 25 meters respectively to obtain two focal points (center point 1 and arc 15 meters; point 2 is the center of the circle, 25 meters is the radius to draw the arc to get a focus 3. Then use the same method to get the focus 4.
3. Connect the four points 1, 2, 3, and 4 to a standard 20m by 15m gateball field.
As shown below:
4. Setting of goal, finish post, kick-off area, and limit line on the goal court
(1) Setting of goal
The position of the first door: the goal line is parallel to the fourth line, and the vertical distance from the outer edge of the goal line is 4 meters. Its center point is
1 line outside the vertical distance of 2 meters;
The position of the second door: the goal line is parallel to the first line, and the vertical distance between the center point and the second line is 2 meters.
3â„4 of the total length of line 2 perpendicular to the outer edge of line 1;
The position of the third door: the goal line is parallel to the third line, the vertical distance between the center point and the outer edge of the fourth line is 2 meters, and the vertical distance from the third line is the full length of the fourth line.
(2) Position of the terminal column: Placed in the center of the field.
(3) Setting of the teeing area: its sideline consists of the 4th line and its limit line, and the two lines perpendicular to the 4th line at the distance of 1m and 3m from the 1st angle to the 4th angle direction.
(4) The setting of the limit line: It can be set at 50cm to 1m outside the line of the game.
(iii) Holding large-scale croquet competitions and drawing of multiple gate courts on football stadiums
For example, there are 8 venues on the football field. Can be arranged in two rows in parallel, with 4 rows in one row. Draw the first four rows first.
1. First, determine a baseline above 90 meters, and then take a point every 20 meters, leaving a certain distance (field spacing) between the two points. One sideline of such four sites is determined.
2. Take the two endpoints of the 20-meter edge as the center of the circle, draw the fox with a radius of 15 meters and 25 meters respectively, and obtain two focal points. Then connect the points to complete one site. The rest of the venue uses the same method.
3. Another row of four venues can be drawn in the same way.
As shown below:
Third, the planning of large-scale croquet game venues
The number of venues needed to hold a large-scale croquet game is the most reasonable. It depends on the number of teams, the time of the game, and the determination of the game plan (game method).
To host a competition, first consider how many venues you need to use according to the number of teams, the competition plan, and the time of the game. If the venue is limited, the venue conditions should be used to consider the game plan, the game time, and so on. Such as:
1. The Third Sports Conference: 24 teams, 3 venues, 3 days of competition. The game plan is that the first stage consists of 4 teams (60 games in total). The second stage has 16 teams participating in the knockout round. The top 8 are eliminated play-offs (20 rounds in total), and the second stage uses half-hour and half time. There were not many teams in this competition, the playing time was three days, and the venue only used three. This is because it is a comprehensive national competition. Although there are not many teams, the game takes 3 days. But this is also reasonable.
2. If it is the scale of the “China Champions League Finals†in 2005, there will be 85 teams, and the first stage of the competition will be divided into 16 groups with 185 games. In the final stage of the second stage, each group of 1, 2, and 32 teams played in the knock-out match, then divided them into five groups with 1-16 players, 17-32 players, and 15 teams of each team played the eliminated play-offs to determine all rankings. A total of 185 preliminaries and 181 finals were required for a total of 366 games and 4 days. In this way, eight venues are required, and each venue will be played 12 games a day in order to finish within 4 days.
3. In the third Asian Championships Championship successfully held in Shanghai, China in 2000, there were 160 teams and 12 venues, divided into 32 groups. The three days ended. The 9th World Championships World Championships, held in 2006 in Jeju, South Korea, is also home to more than 90 teams, 12 venues and 2 days.
The characteristics of international gateball competitions are usually many teams and more venues. Each team in the group matches has a fixed playing field, the competition method is simplified, the total number of matches is small, the time is short, and the atmosphere is very harmonious. The main method is: the playing field is usually more than 12; the game time is 2 days; the first stage group is smaller, usually 4 teams; the second stage only takes the first place to participate in the knockout match, and generally does not play the playoffs. Therefore, international gateball competitions involve multiple teams, multiple venues, fewer appearances, and short time.
According to China's croquet game method, generally 10 teams can consider a venue when planning a venue. In order to finish the game in a shorter time and achieve better results.
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