The slope protection structures along aging waterways are constantly exposed to water immersion, acid and alkali erosion, and alternating wet and dry conditions. Traditional slope protection methods—such as steel sheet piles, concrete, and masonry—are prone to problems like rust, cracking, water seepage, and soil scouring. Conventional repair methods, such as patching and grouting, only provide temporary fixes; they fail to fundamentally resolve issues of leakage and structural aging, resulting in high long-term maintenance costs.
Polymer-composite plastic-steel sheet piles feature a steel core fully encased in a modified PVC outer layer, with no exposed metal parts. This effectively isolates the steel core from water, salts, and acidic or alkaline media, eliminating electrochemical corrosion. They offer stable resistance to aging and water immersion, making them well-suited for river environments subject to long-term cycles of wetting and drying. The product is available in standardized MA, M, and Z cross-sections with stable mechanical properties; its resistance to bending, lateral pressure, and scouring meets the requirements for riverbank reinforcement. The sheet piles’ self-locking tongue-and-groove joints interlock tightly, forming a continuous, sealed retaining wall that effectively seals off seepage pathways and prevents soil erosion from the riverbank slopes.
The profiles possess moderate ductility, allowing them to accommodate minor settlement on soft soil foundations and mitigate the risk of secondary cracking and deformation. The prefabricated construction method causes minimal disturbance, features a simple process, and uses environmentally friendly materials that do not leach harmful substances. It simultaneously achieves slope structure reinforcement, seepage control, and corrosion-resistant durability upgrades, making it suitable for the quality improvement and remediation of various aging river channels and drainage systems. It effectively resolves inherent issues such as leakage, corrosion, and bank collapses in aging slope protection structures.
