Helical Piles / Ground Screws: The Ideal Choice for Solar Ground Systems

 Characteristics and advantages of helical piles

Easy installation

helical piles do not require complicated excavation, pouring and other processes like traditional concrete foundations. It can be directly screwed into the ground through special installation equipment, greatly shortening the construction time. For example, in a medium-sized solar ground power station project, the use of helical piles can shorten the foundation construction time from several weeks in traditional methods to a few days or even shorter.

For some areas with complex terrain and inconvenient transportation, the lightness and easy installation of helical piles are more prominent. Installers can transport helical piles and related equipment to the site and install them quickly, reducing dependence on large construction machinery.

Strong adaptability

helical piles can adapt to a variety of different geological conditions, including soft soil, sand, clay, etc. In different geological environments, by adjusting the length and diameter of the helical piles, it can be ensured that its bearing capacity meets the requirements of the solar energy system. For example, in soft soil, the length of the helical piles can be increased to improve stability; near hard rock layers, helical piles with smaller diameters can be selected and combined with special installation methods.

For areas with large terrain fluctuations such as mountains and hills, helical piles can flexibly adjust the installation height according to the changes in the terrain to ensure that the solar panels can receive sunlight at the best angle.

Reusable

When the solar ground system needs to be relocated or modified, the helical piles can be easily screwed out from the ground and can be reused in the new location after cleaning and inspection. This not only reduces the cost of the project, but also helps save resources and protect the environment.

Cost-effective

Although the unit price of helical piles may be slightly higher than that of traditional concrete foundations, their comprehensive cost is often lower. On the one hand, due to the simple and quick installation process, labor and equipment rental costs are reduced; on the other hand, helical piles do not require a large amount of materials such as concrete and steel bars, which reduces material costs.

Specific application in solar ground systems

Solar photovoltaic power stations

In large-scale solar photovoltaic power stations, ground screws are widely used to support solar panel arrays. Through reasonable layout and design, ground screws can ensure that the panels remain stable under various natural conditions. For example, in strong wind areas, the design of ground screws will consider the impact of wind loads and increase their wind resistance.

The spiral pile can also be combined with the tracking system to enable the solar panel to adjust the angle as the position of the sun changes, improving the power generation efficiency. The tracking system usually requires a more stable foundation support, and the high strength and stability of the spiral pile can meet this requirement.

Solar water heating system

For solar water heating systems, ground screws can be used to install equipment such as collectors and water storage tanks. Since solar water heating systems are usually installed on the roof or ground of buildings, the lightness and adaptability of ground screws make them an ideal foundation choice.

In some solar water heating projects that need to be moved or temporarily installed, the reusability advantage of ground screws is more obvious. It can be quickly installed and disassembled to meet the needs of different users.

Installation precautions

Geological survey

Before installing the spiral pile, a detailed geological survey must be carried out. Understand the properties, bearing capacity, water level and other conditions of the underground soil in order to select the appropriate spiral pile model and installation method. For example, if the groundwater level is high, special waterproofing measures may be required to prevent the spiral pile from corrosion.

For areas with complex geological conditions, field tests can be carried out to determine the actual bearing capacity and stability of the spiral pile.

Installation quality control

When installing spiral ground piles, strictly follow the operating procedures. Ensure that the screw-in depth and verticality of the spiral ground piles meet the design requirements. Use professional installation equipment and tools to ensure the installation quality.

During the installation process, pay attention to check the surface quality of the spiral ground piles to prevent defects such as cracks and deformation. If there are any problems, they should be replaced in time.

Anti-corrosion treatment

Since the spiral ground piles are exposed to the natural environment for a long time, they are susceptible to corrosion. Therefore, anti-corrosion treatment is required to extend their service life. Common anti-corrosion methods include galvanizing and plastic spraying.

In areas with strong corrosiveness such as the seaside, special anti-corrosion materials can also be used or the thickness of the anti-corrosion coating can be increased.

System connection

After the spiral ground piles are installed, they must be firmly connected to other components of the solar system. Ensure the strength and stability of the connection parts to prevent loosening or falling off during use.

For large-scale solar ground systems, it is also necessary to consider the overall stability of the system and take appropriate reinforcement measures, such as setting diagonal braces and tie rods.

In short, spiral ground piles have many advantages in solar ground systems and provide an efficient and reliable basic solution for the development of the solar industry. In practical applications, the type and installation method of ground screws should be reasonably selected according to specific circumstances, and the installation quality should be strictly controlled to ensure the safe and stable operation of the solar energy system.