Plastic steel sheet piles are extruded from reinforced composite materials, featuring high strength, corrosion resistance, lightweight properties, and convenient transportation. Compared to traditional concrete piles or steel sheet piles, plastic steel sheet piles not only offer lower costs but also minimize environmental impact, aligning with modern engineering requirements for environmental protection and sustainable development. In projects with aesthetic considerations, plastic-steel sheet piles can be customized with colors, shapes, or patterns that harmonize with the surrounding ecology and landscape, achieving a unified blend of engineering and environment.

Given these advantages of plastic-steel sheet pile retaining walls, their scientific and rational design is particularly crucial. This paper will conduct an in-depth exploration of the design aspects of plastic steel sheet pile retaining walls, covering multiple dimensions from general provisions to structural types, load combinations, stability calculations, structural calculations, and retaining wall construction. It aims to provide comprehensive and systematic design guidance for relevant engineering designers, ensuring the safe, stable, and efficient operation of plastic steel sheet pile retaining walls in actual engineering projects.