In flood control and flood prevention projects, plastic-steel sheet piles—as a new type of high-strength composite material—are gradually replacing traditional materials due to their excellent resistance to lateral bending and scouring, as well as their environmental friendliness and ease of installation. They are widely used in riverbank protection and embankment reinforcement, providing reliable protection against floods and secondary disasters
Their core strengths lie in lateral buckling resistance and scour protection. Regarding lateral buckling resistance, the use of high-moment-of-inertia cross-sections and interlocking structures, combined with modified polymer composite materials that offer both corrosion resistance and mechanical strength, effectively withstands lateral flood impacts and prevents embankment collapse, making them suitable for extreme flood scenarios
Regarding scour resistance, material and structural optimizations result in a smooth, wear-resistant surface. Combined with a filter layer, this design intercepts sand and gravel and prevents piping, eliminating the need for cofferdams. It performs exceptionally well in areas with rapid water flow and ensures long-term bank stability
Furthermore, plastic-steel sheet pile construction is highly efficient, eco-friendly, durable, and versatile. The material is lightweight and easy to install, non-toxic and recyclable, with a service life exceeding 50 years. It adapts to various geological conditions and flood control scenarios, achieving “multifunctionality in a single pile”
In actual engineering projects, their effectiveness has been validated in initiatives such as the Ningxia Yellow River Phase II Project and the Haining Riverbank Protection Project in Zhejiang. They are also widely applied in urban drainage and agricultural water conservancy scenarios, demonstrating their flood control value
Regarding seepage in embankments, their modular structure can rapidly block seepage channels, while reserved ecological openings enable the coordination of engineering protection and ecological conservation, addressing the shortcomings of traditional riverbank protection methods