The impermeability of fish ponds directly determines the success or failure of aquaculture. Aquaculture farmers choose plastic-steel sheet piles precisely because of their three core advantages: watertightness, corrosion resistance, and long service life. Compared to traditional earthen ponds and plastic-film-lined ponds, plastic-steel sheet piles establish a more reliable impermeability system, from materials to construction.
Manufacturers use high-density polyethylene or composite resin as raw materials to produce the panels through a high-temperature, high-pressure one-piece molding process. The finished panels have a tensile strength exceeding 40 MPa and excellent impact resistance, making them capable of withstanding the lateral pressure from the pond wall soil and long-term immersion in water. Construction workers interlock the panels one by one using a mortise-and-tenon structure, creating a continuous sealed surface at the joints that fundamentally blocks seepage pathways. Upon project completion, the overall impermeability coefficient of the pond walls dropped below 10⁻⁷ cm/s, and the rate of water level decline was significantly reduced.
Aquaculture farmers have long faced the challenge of pond wall corrosion. Fish pond water is rich in organic matter, microorganisms, and feed residues, maintaining a slightly acidic or slightly alkaline state over time. In this environment, metal sheet piles oxidize and rust rapidly, while concrete sheet piles suffer from alkali-aggregate reactions and surface spalling. Plastic-steel sheet piles are chemically stable, resistant to acids, alkalis, and salt spray, and withstand microbial erosion and root penetration. Their smooth surface prevents algae and shellfish from attaching, making routine cleaning very easy for fish farmers.
Construction quality directly determines the effectiveness of the impermeabilization. The construction crew first levels and compacts the pond base, removing sharp rocks and plant roots to prevent the panels from being punctured. Technicians select the sheet pile model based on the pond’s depth and soil conditions; common types include U-shaped and M-shaped, with panel thicknesses ranging from 8 to 10 millimeters. After workers excavate guide trenches, they drive or statically press the sheet piles vertically into the ground one by one, ensuring that the pile bases penetrate the impermeable layer by at least 50 centimeters. When joining panels, align the tongue-and-groove joints and tap them into place gently with a rubber mallet; never strike them forcefully, as this may cause the joints to deform. At corners, use specialized corner piles or cut and join the panels to ensure a continuous, sealed joint.
Plastic-steel sheet piles are also suitable for retrofitting old fish ponds. Construction crews install an additional row of sheet piles on the inner side of the existing pond wall to create a “native soil + sheet pile” composite impermeable structure. The entire process requires no large-scale drainage, minimizing disruption to aquaculture operations. For old fish ponds with severe leakage, this retrofit solution costs far less than a complete rebuild and reduces construction time by more than half.
The manufacturer guarantees a 50-year design service life for the plastic-steel sheet piles. The material degrades slowly in natural environments, and UV-resistant additives further slow the aging process. The panels are recyclable and reusable, aligning with the principles of green building materials. Aquaculture farmers make a one-time investment and reap long-term benefits, with overall costs far lower than those of traditional pond walls requiring frequent repairs.
Large-scale aquaculture farms in Guangdong, Shandong, Jiangsu, and other regions have already taken the lead in adopting the plastic-steel sheet pile waterproofing solution. Aquaculture farmers report that, following the retrofit, the ponds’ water retention has significantly improved, the frequency of water replenishment has decreased, feed utilization has increased, and both stocking density and yield per unit area have risen simultaneously. Pond walls no longer collapse, making pond cleaning and harvesting operations smoother, and overall aquaculture efficiency has improved significantly.
When selecting products, aquaculture farmers should prioritize verifying raw material purity, wall thickness tolerances, and joint precision. Reputable manufacturers provide material test reports and service life guarantees; farmers should firmly reject substandard panels containing recycled materials. Construction crews must possess relevant experience to ensure vertical pile driving and airtight joints. Only when both materials and construction meet standards can the project’s promises of leak-proofing, corrosion resistance, and a long service life be truly fulfilled.