Basic construction requirements for common greenhouses
The foundation period of greenhouse construction is relatively short, and the method of independent foundation or ring beam foundation is generally adopted. What form of greenhouse foundation to choose specifically depends on the type of greenhouse first, and secondly on the basis of local terrain and climate conditions.
1. Simple ground shed. This kind of steel frame film greenhouse generally adopts the ground insertion method, that is, the greenhouse arch frame is inserted 30-50cm below the ground to enhance the stability of the shed surface. This kind of shed has a small load and is generally not produced in winter.
2. Solar greenhouse. This kind of solar greenhouse is generally divided into two structures: earth wall and brick wall. Among them, the earth wall is dug 1-1.2 meters down, and the wall is built by rolling the soil on the spot, and the embedded parts are embedded in the wall and welded with the main arch.
Brick-walled solar greenhouses generally lay a 30-50cm brick foundation, tamp the bottom of the foundation and lay a 5cm notoginseng ash or plain concrete cushion, directly build the wall on the top of the foundation, and then plaster the exterior with cement mortar.
3. Multi-span film shed. The foundation of this kind of greenhouse generally adopts C15 or C20 pouring 40*40*60cm column type independent foundation, one masonry is built under each main column and welding embedded parts are reserved. The high-standard multi-span film shed is designed to have a long service life. Generally, C20 or C25 pouring ring beams and independent foundations are used. The size of the foundation is generally 40*40*80cm.
4. Multi-span greenhouse. Generally refers to multi-span glass or solar panel greenhouses, which are all constructed with C20 or C25 ring beams and independent foundations. The service life is generally more than 20 to 25 years, and the depth of the foundation pit of the greenhouse is generally 80-120cm. According to the local climate and geological conditions, generally 20cm below the permafrost layer is suitable, and it is appropriate to deepen 20-30cm in cold areas with heavy snowstorms.
