棚边有较高物体时要多设置压膜绳

Tent side have higher object to set the pressure membrane on the rope

根据多年的经验来看，拱棚附近如果存在较高的物体，如房屋、树木等等，大风会因这些物体的阻挡而形成气旋或乱流，特别是这些物体在拱棚正南方向时，回旋的气流被阻挡后下降，通过棚南侧缝隙较多的进出口进入棚内，造成棚内气压不一致，可能会将棚膜鼓破。建议拱棚附近有高大物体的菜农，增加压膜绳的数量，把拱棚出入口封堵严密，阻止气流进入。

According to many years of experience, if there is higher near the tunnel objects, such as houses, trees, etc., the wind will be formed by these objects blocking cyclone or turbulence, especially when these objects in the tunnel south, cyclotron decline after the air flow is blocked, through shed the gap more import and export into the barn, caused by relative pressure is inconsistent, might shed film drum. Suggest tunnel near a tall objects of vegetable farmers, increase the number of squeeze film rope, the tunnel entrance sealed tight, prevent air from entering.

棚面角度小的拱棚要加强固定

Small tunnel must strengthen fixed canopy face Angle

据了解，拱棚的棚面角度小且两边较高的拱棚，对风的阻挡较大，若通风口不严，气流通过棚面时容易造成棚内外压力不一，棚膜上下鼓动，将棚膜鼓破，严重的可能会导致整个拱棚坍塌。因此，这样的拱棚一是改造拱棚结构，降低两侧立柱高度，加强两侧立柱的承受能力，增加棚面拱度，二是增加棚面压膜绳的数量，关严通风口处，提高棚体的抗风能力。

It is understood that the tunnel tent face Angle on both sides of the small and high tunnel, bigger to the blocking of the wind, if the vent is lax, could easily cause relative airflow through the canopy face external pressure is differ, films, up and down to films drum, serious can lead to the tunnel collapse. As a result, this tunnel is a modified tunnel structure, reduce the column height on both sides, strengthen the capacity on both sides of the pillar, increase the casing surface camber, 2 it is to increase the number of shed film surface pressure rope, locked vents, improve the body's ability to resist wind.

两侧添加防风膜

Add clear protective film on both sides

对于拱棚的防风，菜农可在拱棚的东西两侧底部各设置一块防风膜，防风膜的宽度要能从拱棚一侧的地下到最上部的放风口为宜，例如刮西风时，菜农将西侧的防风膜遮起，这样就能避免大风从拱棚西侧的放风口进入棚中，防止风大刮破棚膜。如果风力超过6级，拱棚还要将背风一侧的放风口打开，保证棚内气流的排出，这样防风效果更好。

For wind tunnel, the farmers can be set up in tunnel things on both sides of the bottom of a clear protective film, the width of the clear protective film to the underground to the upper snort from one side of tunnel mouth advisable, such as scraping the zephyr, the west side of vegetable farmers will wind membrane covered up, and this helps to avoid strong winds from the west side of tunnel mouth fresh air into the tent, prevent the wind big films. If wind over level 6, the tunnel will bring fresh leeward side open mouth, to ensure that the heat flow discharge, the wind effect is better.

对于东西方向的拱棚，要注意加强两侧棚膜的抗风能力，一是要将进出口封堵严密，二是在两侧棚膜上多设置压膜绳。不过需要注意的是，棚室两侧棚膜有一定倾斜角度，使用压膜绳不好固定，可采用5厘米左右的宽布条，与棚膜成垂直角度斜拉在地锚上。

For things in the direction of tunnel, should pay attention to strengthen the ability to resist wind films on both sides, one is to tight seal of imports and exports, the second is in both films set the pressure on the membrane on the rope. But it is important to note that both sides PengShi films have a certain Angle, using membrane fixed rope is bad, can use 5 centimeters wide cloth, suspension and films into a vertical Angle on the anchor.

最后，拱棚棚膜上出现的各种裂口要及时粘补，避免风大时棚膜从此处撕裂。

Finally, the tunnel films all the cracks to appear in the fusible interlining in time, avoid wind big films from the tear.