Reinforced concrete independent foundation
A reinforced concrete independent foundation is respectively arranged under the front and rear pillars of the solar panel support, and is composed of a basic bottom plate (cushion) and a basic short column above the bottom plate. The top of the short column is provided with an embedded part (steel plate or anchor bolt) connected to the upper solar mounting brackets, which requires a certain depth of burial and a certain base area; the foundation floor is covered with soil, and the foundation weight and the foundation soil are combined to resist the environmental load. The upper pull force, with a larger base area to disperse the vertical load of the photovoltaic support downward, with the friction between the base bottom and the soil and the resistance of the base side and the soil to withstand the horizontal load.
The transmission path is clear, the force is reliable, the scope of application is wide, the construction does not require special construction machinery, and the ability to resist horizontal loads is the strongest, and it is resistant to flood and wind.
The required amount of reinforced concrete is large, artificial, and the earthwork excavation and backfilling volume is large, the construction period is long, and the damage to the environment is large. The limitations of this foundation are too large and are rarely used in today's photovoltaic power plants.
Reinforced concrete strip foundation
By setting the foundation beam between the front and rear columns of the solar mounting brackets, the foundation center of gravity is moved between the front and rear columns, and the basic anti-overturning force arm is increased, and the photovoltaic support overturning moment can be resisted by the self-weight only against the wind load; the strip foundation It has a large contact area with the foundation soil and is suitable for areas where the site is relatively flat and the groundwater level is low. Because the surface area of the foundation is relatively large, the depth is generally between 200 and 300 mm.
The earthwork excavation is small, no special construction tools are needed, and the construction process is simple.
It requires a large area of field level, which has a great impact on the environment, a large demand for concrete, and a long maintenance period, requiring a lot of labor. The foundation depth is not enough to resist flooding.