What is the construction method for the infield site?

The ground floor material of the infield soil field is made of sintered earth.

The construction method is to make the earth road bed after the earthwork is filled and excavated according to the design requirements, and use the heavy roller to carry out the roller compaction. The density requirement shall be over 90%, and there shall be no phenomenon of tumbling.

The gravel material shall be paved after the soil road bed is completed. A large amount of water shall be sprinkled after the leveling, and then roller compaction shall be performed 1 to 2 times with a steel wheel compactor to make repairs, fill pits, and finally compacted with a heavy steel roller.

The surface layer of the sintered soil is constructed in two parts. The first part is the entire inner field, and the second part is the construction of the pitcher area.

The first in-house overall construction

The paving of the sinter soil started from the border line, starting from the home base, to the first base direction to the grass line, the width of each paving was not less than 5cm, the paving of the whole site was completed, and the elevation and the imaginary thickness were checked with a 5mx5m square grid, and the general thickness was Can be controlled in the 1.35 ~ 1.45 paving, leveling. Can be sprinkled water, sprinkler volume should be controlled at the optimum moisture content, generally about 9% to 12%, after the surface of the water to be sprayed, can be roller compacted with a light drum roller, stop pressure after 1~2 times, start the whole field trimming, Check the elevation and flatness, and check whether or not there is any slurry, confirm that there is no problem, and you can use heavy-duty (8 ~ 12 tons) roller to roller until no obvious wheel mark reaches the density requirement (95%).

The second pitcher area construction

The pitch area has a clear requirement in the rules of the game. It is a round raised platform, and an 86.4cmx152.4cm platform must be made at the highest point. The plane is not in the center of the pitcher area. This position must be accurate during construction. Placement, pitcher area layout shown in Figure 3.5.1, pitcher area gradient change shown in Figure 3.5.2.

投手区平面布置示意图

After finishing the in-field rolling, water is sprayed in the area of ​​the pitcher and then the soil is raised according to the design elevation. The height of the soil should exceed 5~10cm, and the roller can be rolled with a small hand roller. After compaction, E, F, G are measured. H. Four points and elevation piles, and measure the position and elevation of the round edge of the pitcher area. Connect eight lines of AE, AH, BE, BF, CF, CG, DH, and DG with small lines. Manually remove excess earthwork. In the end, the small earth platform required by the rules of the baseball game was formed. In particular, the EFGH platform must be made accurate so that the pitch board can be properly laid. See Figure 3.5.1.

投手区坡度变化示意图

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