Improving the wind resistance of arch sheds and preparing for wind protection in advance is the basis for reducing wind damage.
The first is to strengthen the columns, replace the old bamboo poles, and put on the shed film, which is the basis for improving the wind resistance of the arch shed. The tightness of the upper film and the setting of the vents have a great impact on the ability to resist wind. When applying the film, you should choose a sunny day without wind, and you must tighten it before you go on. The shed film cannot be loosened. This way, the shed film has a small range of motion, is not easy to be agitated by the wind, and is not easy to break.
The second is to pay attention to the setting of the ventilation openings when the film is applied. The overlap of the two films is preferably 25 to 30 cm to ensure the tightness of the arch shed. It should not be too wide, so as not to affect the ventilation, especially when the air vents are not open at high temperature in summer, which will affect the cooling of the shed. It should not be too narrow to avoid the air vents not being tightly closed when the wind is strong. Stronger.
The third is to do a good job of wind protection in key parts. According to many years of experience, if there are high objects near the arch shed, such as houses, trees, etc., strong winds will cause cyclones or turbulence due to the blocking of these objects, especially when these objects are in the south direction of the arch shed. After being blocked, it descends, enters the shed through the gap on the south side of the shed, causing inconsistent air pressure in the shed, and may rupture the shed film. It is recommended that vegetable farmers with tall objects near the arch shed increase the number of laminating ropes, and double-layer films are set at the door to tightly block the entrance and exit of the arch shed to prevent airflow from entering.
The fourth is to strengthen inspections during high winds. The strong wind will agitate the shed membrane. If the ventilation openings are not set properly, it is likely to be scraped, causing the air pressure in the shed to change, affecting the structure of the shed. In particular, arch sheds with small angles on the sides and higher sides have greater resistance to wind. If the ventilation openings are not strict, the air flow will easily cause different pressures inside and outside the shed, which will rupture the shed film, which may cause serious damage. Caused the entire arch to collapse. Such arch sheds should pay attention to the transformation, strengthen the bearing capacity of the columns on both sides, increase the number of mulching ropes on the shed surface, close the ventilation openings, and improve the wind resistance of the shed. During high winds, you must pay attention to inspections, observe the conditions of the vents and changes in air pressure in the shed, and adjust in time to avoid the situation of rupturing the shed film or even scraping the shed.
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