The importance of photovoltaic brackets is the first in the entire photovoltaic power station system. The design and installation of the entire matrix are directly related to the power generation and stability of the photovoltaic power station. For this reason, the selection of the bracket base is particularly important. However, many owners who want to install photovoltaic power plants are often confused about the environment in which they want to install photovoltaics and how to choose the correct type of base. Yizhao New Energy summarizes it for you based on many years of actual production experience. The following are the types of bases and their characteristics.

Ground photovoltaic support base types and characteristics:

*** Bored cast-in-place pile base: It is more convenient to form holes. The top elevation of the base can be adjusted according to the terrain. The top elevation is easy to control. The amount of concrete steel bars is small, the amount of excavation is small, the construction is fast, and the damage to the original vegetation is small. However, there is on-site drilling and pouring of concrete, which is suitable for general fill soil, clay soil, silt soil, sand soil, etc.

NO.2 Steel Spiral Base: It is convenient to form holes, the top elevation can be adjusted according to the terrain, and is not affected by groundwater. It can be constructed as usual under winter climate conditions. The construction is fast, the elevation adjustment is flexible, it has little damage to the natural environment, and there is no filling The excavation project will cause little damage to the original vegetation and does not require site leveling. Suitable for deserts, grasslands, tidal flats, next door, frozen soil, etc. However, the cost of using larger steel materials is high, and it is not suitable for highly corrosive foundations and rock foundations.

NO.3 Independent base: The strongest water load resistance, flood and wind resistance. It requires the largest amount of reinforced concrete, requires a lot of labor, requires a large amount of earthwork excavation and backfilling, has a long construction period, and is highly destructive to the environment. It is rarely used in photovoltaic projects.

NO.4 Reinforced concrete strip base: This type of base is mostly used in flat single-axis tracking brackets with poor foundation bearing capacity, relatively flat sites, low groundwater levels, and high requirements for uneven settlement. 

NO.5 Prefabricated pile base: Prestressed concrete pipe piles with a diameter of about 300mm or square piles with a cross-sectional size of about 200*200 are driven into the soil. Steel plates or bolts are reserved on the top to connect to the front and rear columns of the upper photovoltaic bracket. The depth is average. Less than 3 meters, construction is relatively simple and fast.

NO.6 Bored cast-in-place pile base: The cost is low, but the soil layer requirements are high. It is suitable for silt soil with a certain density or plastic and hard plastic silty clay. It is not suitable for loose sandy soil. In the layer, pebbles or gravel with harder soil may be difficult to form holes.

NO.7 Steel Spiral Pile Base: Special machinery is used to screw it into the soil. The construction speed is fast, no site leveling is required, no earthwork and no concrete. It protects the vegetation on the site to the maximum extent. The height of the bracket can be adjusted according to the terrain. The spiral pile can Secondary use.

NO.8 Cement weight method: Pour cement piers on the cement roof. This is a common installation method. It has the advantage of being stable and does not damage the waterproofing of the roof.

NO.9 Prefabricated cement counterweight: Compared with making cement piers, it saves time and saves cement buried parts.

A reasonable layout of the bracket system can improve the system's ability to withstand wind and snow loads, and rational use of its load-bearing characteristics can contribute to further reducing the cost of the photovoltaic system.

The loads acting on the photovoltaic support base mainly include: self-weight of the support and photovoltaic modules (constant load), wind load, snow load, temperature load and earthquake load. The main control factor is wind load. Therefore, the foundation of the base design should ensure the stability of the base under the action of wind load. Under the action of wind load, the base may be uprooted, broken, and other damage phenomena. The design of the base should be It can be guaranteed that no damage will occur under this force.