The core design philosophy of plastic-steel sheet piles is “using plastic for corrosion resistance and steel for load-bearing capacity,” achieving a synergistic performance breakthrough where “1+1>2” through scientific structural integration. Its structure primarily consists of inner and outer layers, forming a synergistic composite system: The outer layer utilizes high-strength polymer plastic (typically recycled PVC, HDPE, and other eco-friendly materials), extruded through specialized processes to create a dense protective shell. This not only effectively resists corrosion from seawater, freshwater, acid rain, acidic/alkaline soils, and other corrosive media but also establishes a continuous, seamless water barrier. The inner layer embeds a high-strength carbon steel or composite steel skeleton as the core load-bearing structure, providing ample bending strength, shear strength, and structural stability. This ensures the pile can withstand external forces like earth pressure and water flow impact under complex geological conditions.

Compared to traditional materials, plastic-steel sheet piles exhibit significant advantages in material properties: First, exceptional corrosion resistance: the plastic casing fundamentally eliminates the rusting issues and frequent anti-corrosion treatments required by traditional steel sheet piles, extending service life to over 50 years—far exceeding conventional steel sheet piles. Second, lightweight yet high-strength: weighing only one-third to one-quarter of steel sheet piles of equivalent specifications, they drastically reduce transportation and handling costs while enabling installation without heavy construction machinery. Third, they are environmentally friendly and recyclable. Core materials predominantly utilize recycled plastics, with construction processes generating no noise or pollutant emissions. The piles are 100% recyclable, fully aligning with green development principles under the dual carbon goals. Fourth, they exhibit excellent low-temperature adaptability, maintaining good elasticity and toughness even in severe cold environments. They do not become brittle or crack due to temperature changes, making them suitable for various extreme climatic conditions.