Steel-plastic composite sheet piles, as a structural material, primarily consist of specialized steel plates and plastic composite materials. They combine the strength of steel with the corrosion resistance of plastic, offering characteristics such as light weight, easy installation, and excellent anti-corrosion properties. In urban infrastructure construction, steel-plastic composite sheet piles are widely used in projects like deep foundation pit support, tunnel lining, retaining walls, breakwaters, and wharf walls, playing a vital role.