Natural turf drainage is very important for the football field. To ensure that the game can be played intermittently in the rain and after rain, there must be an excellent design scheme on the one hand, and on the other hand, the construction operation should be meticulous, and the materials must be qualified to achieve the final result.
Site drainage system consists of three aspects: surface slope drainage, soil bed drainage, forced drainage.
Surface slope drainage: This is mainly due to the surface slope drainage of the site, which is also the main drainage method. The general site drainage slope can be seen in Figure 2.2.23.1 The construction operation method is to make every layer of the grass bed structured, each layer is Paving work should be done separately, and the slope of each layer should be guaranteed to meet the design requirements so that it starts from the lower layer. See Figure 2.2.23.2 for layer rolling, trimming is strictly prohibited for chaotic rolling, measuring requires 5mx5m square grid control structure Thickness and slope of each layer.
Soil bed drainage: There are two ways to penetrate the water. First, it penetrates through each layer of structural material of the grass bed, and finally penetrates into the soil in the whole field. During the construction, each floor should be paved and rolled separately, with or without the use of dressing. The most important thing is that the materials should be kept clean and there should not be too much mud, especially the gravel layer. Over 5% of the mud content, the permeation layer also includes blind ditch drainage, blind ditch construction requirements are meticulous, otherwise it will not reach the blind ditch drainage effect. Blind ditching can not be too wide or too deep. After digging, it should be trimmed according to the blind ditch's longitudinal drainage slope. When placing the blind pipe, it is necessary to straighten the pipe and pipe, not to worry, after the blind pipe is laid flat, On both sides of the pipe, the gravel can be enlarged to close the pipe body, and the gravel backfilled around the blind pipe should be layered and backfilled to prevent the pipe from being damaged and the blind pipe should be squeezed. After the backfill is completed, the steel grate can be inserted into the gravel layer to make Gently shake to grind the gravel.
Forced drainage, mandatory drainage method, most suitable for rainy areas, different from the above two kinds of drainage methods, the above drainage by the gravity flow of water discharged outside the site, and forced drainage is buried in the gravel layer of the water pipe, the water filter pipe connection The main pipe enters the pump room. Through the action of the pump, the water seeping into the gravel layer is strongly sucked into the trunk pipe and pumped into the sewer. This is a football field with major competitions. The effective drainage method is used. . The construction method is to embed a water filter pipe between two blind ditch, the interface is provided with a threaded interface, the filter pipe is outsourced to the sand control filter layer, and the three-way connection through the variable cross section is connected to the main pipe. The water filter pipe should be 1% when excavating the tank. Gradient, backfill with gravel backfill, do not backfill with soil, see Figure 2.2.23.3 and Figure 2.2.23.4 The advantage of forced drainage method is that the drainage speed is fast, and it can also play in rainy days. The disadvantage is that the cost is high, because simply relying on forced drainage The law cannot completely solve the problem of drainage. It also needs the cooperation of the first two types of methods to completely solve the problem of drainage.
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