Against the backdrop of accelerating energy interconnection and new infrastructure development, spiral ground piles, built with high-strength steel, are reshaping the construction logic of infrastructure projects by leveraging the dual advantages of "mechanical innovation + green construction." From typhoon-resistant support for UHV towers to foundation laying for wind power storage projects in cold regions, this "steel spiral," with its precise structural design and superior performance, has overcome construction bottlenecks under complex working conditions. It has become a key vehicle connecting steel manufacturing with infrastructure needs, opening a new path for efficient and intelligent development of infrastructure projects.

The extreme scenarios of energy infrastructure are testing the limits of steel performance. In the UHV transmission sector, spiral ground piles, by combining Q690 high-strength structural steel with a multi-blade design, can achieve a vertical bearing capacity of 30-50 tons per pile, easily meeting the load requirements of 500kV towers. In a power transmission line project in Jiangsu, a tower using 8-meter-long spiral piles remained intact during a strong typhoon, while a nearby traditional foundation tower tilted, demonstrating its superior ability to withstand lateral loads. Cold-region construction further highlights the advantages of steel. The Liumao Lake Wind Energy Storage Project in Heilongjiang Province employed 3-6-meter spiral piles, leveraging the low-temperature toughness of Q355B steel to overcome the limitations of winter concrete construction, shortening the construction period by three months and accelerating grid connection by two months.

Innovations in mechanical design unlock the potential of steel. A team from Chongqing University, using transparent soil technology and laser speckle analysis, revealed the "interlocking load-bearing" mechanism between spiral piles and soil: the spiral blades extend the influence of the soil around the pile to three to four times the pile diameter, increasing the bearing capacity by over 40% compared to smooth piles. In engineering practice, optimizing the taper angle (1° is the optimal value) and spiral pitch (pile diameter ratio 1.1-1.5) can increase the pullout strength of a single pile by 25%. This parameter optimization maximizes the mechanical properties of Q355B steel. In a wind power project along the Zhejiang coast, hot-dip galvanized spiral piles (zinc layer thickness ≥ 85μm) achieved a 90% recycling rate, resisting marine corrosion while also promoting resource recycling.

Smart construction and standardization are driving industrial upgrading. Modern spiral pile construction now features digital management throughout the entire process. GPS positioning and intelligent torque systems monitor screw depth and verticality in real time, ensuring a single pile installation error of ≤2°. Applications in the photovoltaic sector further demonstrate the advantages of standardization: Photovoltaic piles using a cold-formed process take only 5 minutes to install per pile. Combined with a modular design, they reduce power station foundation costs by 30%, and their 25-year service life perfectly matches photovoltaic modules. In the future, intelligent ground piles with integrated sensors will enable real-time monitoring of load status, while the use of lightweight alloy steel will further reduce transportation and construction energy consumption, driving the development of spiral ground piles towards an integrated "sensing-load-carrying-circulation" system.