1. Walls are not rolled compactly; cutting surfaces are not smooth and even.
The quality of the greenhouse wall directly affects its lifespan. Moreover, in recent years, greenhouse construction has been evolving towards taller, wider, and column-free structures, which further necessitates stronger wall stability and better structural integrity.
For the foundation of a glass greenhouse, the bottom of the walls should first be compacted with a bulldozer (if constructing a high-standard vegetable greenhouse, the required width of the compacted soil should be between 6-8 meters) to prevent地基 from sinking. Subsequently, use an excavator to add soil, and for every 50 cm layer of loose soil, compact it with the bulldozer at least 3 times back and forth. The height of the rear wall should be around 4.5 meters, and the top of the wall should be compacted with the bulldozer as well. Additionally, when cutting the greenhouse walls with an excavator, ensure a certain slope, narrower at the top and wider at the bottom, with an inclination of 6-10 degrees, and the wall surface should be smooth.
2. Utilizing Poor-Quality Poles
Switching to finer reinforcing steel. The compressive strength of concrete pillars largely depends on the quality of the steel used. The thicker the steel, the stronger the compressive strength. However, to reduce costs, manufacturers producing greenhouse pillars have changed the diameter of the steel used in concrete pillars from the original 4mm to 3-3.5mm, significantly reducing the compressive strength of the concrete pillars. This makes it more prone to breaking if the load on the greenhouse roof exceeds the limit.
Steel bar heads are being used. While some pillars may appear to meet the required diameter standards with exposed steel ends, the steel bars inside the pillars are actually all broken bar heads, significantly reducing the compressive strength of the pillars. Many are prone to fracturing under heavy loads, and this greatly diminishes the lifespan of the glass greenhouse.
