Because of the high land utilization rate and the simple construction of the sheds, many of the original vegetable growers started to build sheds. However, many vegetable farmers have many misunderstandings in the construction of arch sheds. For example, all the pillars in the arch shed are perpendicular to the ground, the sheds are straight, and there are no retaining walls on both sides of the shed. So how should these misunderstandings be improved? Here we introduce some methods and hope to help farmers.
Vertically buried slopes on both sides of the arch and two vertical columns
When setting up columns for arches, the vegetable cultivators used to bury all the columns in the arch shed vertically. When the arch shed encounters strong winds, the shed body is blown by the wind and tilt occurs. When the shed is severe, the columns break and the arch shed collapses. Practice has proved that the use of inclined arch shed to set up the column, its ability to resist pressure can be significantly improved. Therefore, when the vegetable farmer decides to construct the arch shed, he should lay the vertical row of posts in the middle of the arch shed vertically, and the other columns on both sides of the arch shed should be laid in an inclined manner. Take the north-south arch shelter as an example. If the number of columns needed to construct the arch shed is odd, you should set the vertical column at the middle of the arch vertical, and for the columns on the east side of the middle pillar, the vegetable farmers should let It is inclined to the east side, and the tilt angle of the pillar is larger outward. However, vegetable growers should also pay attention that the slope of the outermost column of the shed should not exceed 2 degrees. For the pillar on the west side of the middle pillar of the arch, it is necessary to pay attention to the inclination to the west when embedding, and the angle of inclination should be symmetrical with the pillar on the east side. For the pillars on the north and south sides of the arch, it should be set slightly outward. When these pillars are connected together using bamboo rafts, their supporting ability between them is enhanced, which can greatly improve the wind and pressure resistance of arch shelters. After such improvement, if the west wind is encountered, the column on the west side of the greenhouse will have a strong resistance to the wind because it is tilted to the west, and the wind shed will no longer occur in the arch shed.
Arch awning easy to arch should not be flat
Many farmers who grow sheds have the feeling that if the shed is relatively flat, it will not only affect the lighting of the shed, it will lead to slower temperature increase in the shed, and it should not discharge the hot and humid air inside the shed when the shed is released. Outside the shed, it is not easy to ventilate. Therefore, when constructing arch sheds, vegetable growers should pay attention to increasing the crown of the arch shed to enhance the lighting and ventilation of the shed.
For greenhouses with a width of about 15 meters built by growers, 7 columns are generally required. If the height of the highest column in the middle of the arch is 3.8 meters, the height of the adjacent second column is 3.2 meters, and the height of the third column is 2.5 meters. The height of the side column should be 1.6 meters, and the depth of the column should be about 40 centimeters. The distance between the middle set of columns and the second set of columns is 2.7 meters. The spacing between the second set of columns and the third set of columns is 2.5 meters, the distance between the third group of columns and the side columns is 2.3 meters. After the arch shed constructed in this way, the ideal degree of crown can be achieved.
After the arch of the arch increases, when it encounters heavy snow, the snow can slide down from the shed film to ensure that the shed is not collapsed. At the same time, when the crown of the arch shed increases, the hot and humid air in the shed can be expelled out of the shed faster when it rises, which is conducive to the control of the temperature in the arch shed.
Shed walls should be set on both sides
When building a shed, the distance between the arch shed and arch shed is usually less than one meter, which is very small. When encountering heavy rain, the rainwater will gather between the two sheds because there is no retaining wall, both inside and outside the arch shed. The same height of the ground, the rain will easily flow into the shed, there will be sheds, affect the growth of vegetables in the shed, and serious will lead to a large area of ​​shed vegetable dead trees. Therefore, when constructing sheds, vegetable growers should also set a low water retaining wall on both sides of the shed.
In general, the height of the retaining wall is set to 15 to 20 cm above the ground plane. When setting up the retaining wall, the vegetable farmer can set it on the inside of the side post of the arch. The vegetable farmer can take the soil from the gap between the arch shed and the arch shed (this also helps to form a drainage ditch between the arch shelters to facilitate the drainage of rainwater). Then the vegetable grower presses the lowermost edge of the film on the outer side of the retaining wall, which can play a very good anti-rain effect.
Rongcheng Jingyi Oceanic Technology Company Limited , https://www.jingyifoods.cn