What is a ground screw? Are ground screw better than concrete?

Ground screw is a highly economical foundation structure that is suitable for different types of foundations such as solar ground mount, construction, signage, lighting, towers, fencing, household and can be reused without damaging the land compared to concrete foundation structures.

Characteristics of ground screw piles:

1、Reliability of helical ground screw pile

Spiral ground screw pile blade spacing ratio (blade spacing/blade diameter) changes is an important factor affecting the pile ultimate pullout and compressive bearing capacity. According to the experimental research, blade spacing ratio S/D = 3 ~ 4, the ultimate bearing capacity of the pile is relatively good. For the small helical ground pile commonly used in photovoltaic foundation, it is recommended to use the blade spacing of S/D=3. The pullout and pressure bearing capacity of double-blade pile increases with the increase of blade diameter (blade diameter squared), and presents an approximately linear relationship. From the perspective of bearing capacity, the double-blade ground screw pile is superior to the continuous-blade ground screw pile, and has certain construction advantages.

2、Applicability of spiral pile

The applicability mainly refers to the deformation and cracking of the spiral ground screw pile. Due to the high strength of the spiral ground screw pile itself, and the solar mounting system is not particularly large for the spiral ground screw pile load, the spiral ground screw pile will not have excessive deformation and cracking problems.

3、Durability of spiral ground screw pile

Durability mainly refers to the anti-corrosion ability of spiral ground screw piles. The spiral ground screw pile will have hot-dip galvanized anti-corrosion treatment during processing.

Processing of spiral ground screw piles:

Spiral ground screw piles are generally cut off, deformed, welded, pickled, hot-dip galvanized, and other processes to produce qualified ground screw piles, of which pickled, hot-dip galvanized is an important anti-corrosion treatment process that directly affects the service life of spiral ground screw piles.

The level of ground screw pile processing directly determines the service life of metal ground screw piles, such as the quality of the selected welded pipe, the quality level of welding, whether there are sand eyes, false welding, the width of welding, all these affect the future service life of ground piles and the quality of subsequent processing, pickling is an important anti-corrosion basic process, while the quality of hot-dip galvanizing, such as the time of hot plating, good or bad surface treatment, all affect the quality of anti-corrosion treatment of ground screw piles. In general, spiral ground screw piles can be used for 40-80 years. Whether the use process is proper or not, improper use can lead to the destruction of the surface of the metal ground screw pile, so that the metal protective layer is destroyed, leading to the acceleration of the corrosion of the metal ground screw pile and reducing the service life.