Carbon Steel Solar Ground Mount System - Screw Pile Foundation

Carbon steel helical pile foundations have become the mainstream choice for photovoltaic projects due to their environmentally friendly and efficient characteristics, especially in the following scenarios:

▶ Large-scale ground-mounted and mountainous photovoltaic power stations:

This is the core application scenario for helical piles, adaptable to undulating terrain and maximizing the protection of the original landform.

▶ Agro-solar and aquaculture-solar complementary projects:

In agricultural and aquaculture areas, construction causes minimal disturbance to the land and water bodies, without affecting daily production activities.

▶ Ecologically fragile areas such as deserts, grasslands, and tidal flats:

Minimizing the impact on the ecological environment makes them an ideal choice for these projects.

▶ Temporary or relocation projects:

The all-metal structure and recyclability give them unparalleled advantages when the project is decommissioned.

Despite its wide applicability, the following geological conditions limit its direct use and require special attention:

▶ Highly corrosive foundations (high salinity or industrial pollution areas):

Standard hot-dip galvanizing may be insufficient to resist long-term corrosion. Special anti-corrosion solutions (such as zinc-aluminum-magnesium coating or external concrete encasing) must be adopted; otherwise, there is a significant risk of structural failure.

▶ Moderately weathered or more severely weathered rock foundations:

Helical piles are difficult to directly screw into hard, intact rock. Pre-drilling is usually required, followed by grouting and anchoring, which increases the complexity and cost of the process.

▶ Pure quicksand layers or loose, high-water-content silt layers:

In highly fluid soil layers, the helical blades cannot achieve effective soil engagement, resulting in extremely poor pile bearing capacity. Direct use is strictly prohibited.

▶ Strata containing large gravel, pebbles, or underground obstacles:

This can cause severe deflection or jamming of the pile during screwing, making it impossible to guarantee the verticality and design bearing capacity of the pile.

Summary