First of all, it is necessary to reinforce the column, replace the old bamboo raft, and put on the shed film. The tightness of the upper membrane and the setting of the vents have a great influence on the wind resistance. When you are in the film, you should choose a windless and sunny weather. Be sure to tighten it before you put it on. You can't let the shed film loose. Pay attention to the venting of the film, the overlap of the two membranes is preferably 25 ~ 30 cm, to ensure the airtightness of the arch shed, not too wide, so as not to affect the ventilation and high temperature when the shed cools; nor can it be too narrow to avoid When the wind is strong, the venting port is not tight, and the wind enters the shed to bulge the shed film, which is more destructive.
Second, we must do a good job in the wind protection of key parts. If there are high objects near the arch shed, such as houses, trees, etc., the strong wind will form a cyclone or turbulent flow due to the blocking of these objects. Especially when these objects are in the south direction of the arch shed, the swirling airflow is blocked and then descends. The gap in the south side enters the shed, causing the air pressure in the shed to be inconsistent, and the shed film may be broken. It is recommended to increase the number of lamination ropes when there are tall objects near the arch shed, and set a double-layer film at the door to tightly block the entrance and exit of the arch shed to prevent airflow.
Finally, pay attention to strengthening the inspection during the gale. The strong wind will invigorate the shed film. If the venting opening is unreasonable, it may be scraped open, causing the air pressure in the shed to change, affecting the structure of the shed. In particular, the arch shed with small shed angle and high sides has a large blocking force against the wind. If the vent is not strict, the airflow through the shed will easily cause different pressures inside and outside the shed, and the shed film will be broken. Seriously, it may Caused the entire arch shed to collapse. For such arch sheds, attention should be paid to strengthening the bearing capacity of the two columns, increasing the number of lining laminating ropes, closing the vents, and improving the wind resistance of the shed.
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