The spiral steel pile foundation for photovoltaic brackets
The spiral steel pile foundation, also known as a steel ground anchor, is an increasingly widely used foundation form for photovoltaic brackets. It consists of hot-dip galvanized steel pipe piles with spiral blades under both the front and rear columns of the photovoltaic brackets. The spiral blades can vary in size, and can be continuous or intermittent. The spiral blades are continuously welded to the steel pipe piles. During construction, specialized machinery is used to rotate the piles into the soil.
The upper part of the spiral steel pile foundation is exposed above the ground, and it is connected to the upper bracket columns through bolts. Its load-bearing mechanism is similar to that of a common screw in daily life. The pile is rotated into the soil using matching machinery, and the side friction between the steel pipe pile and the soil, particularly the gripping force between the spiral blades and the soil, resists uplift forces and bears vertical loads. The interaction between the pile body, spiral blades, and soil resists horizontal loads.
The advantages of the spiral steel pile foundation are significant. It has a fast construction speed, does not require site leveling, and involves no earth excavation. Multiple forms can be selected based on the geological conditions of the photovoltaic site. It also has excellent environmental performance, maximizing the protection of the site's vegetation, minimizing environmental impact, and allowing for easy restoration of the site to its original state.
Spiral steel piles are convenient for adjusting the upper brackets, allowing the bracket height to be adjusted according to the terrain. The galvanized coating on the surface of the pile is corrosion-resistant, ensuring that the spiral piles have considerable load-bearing capacity underground. As a result, spiral steel piles can be reused if needed.