In construction scenarios, plastic-steel sheet piles are the preferred choice for hydraulic support projects. This material offers practical advantages such as corrosion resistance, high sealing performance, rapid installation, and excellent cost-effectiveness, making it ideally suited for various hydraulic engineering tasks, including fish pond renovations, channel lining, and the construction of small cofferdams. Thanks to its resistance to water and soil erosion as well as water corrosion, construction crews can eliminate routine anti-corrosion maintenance procedures, significantly simplifying subsequent operation and maintenance work. We carefully select pile types based on on-site geology, water depth, and construction conditions to comprehensively ensure the project’s impermeability and structural stability.
Tailored to the specific conditions of fish pond projects, we use lightweight, thin-walled U-shaped plastic-steel sheet piles for shoring operations. Since fish ponds typically feature shallow water levels and soft silt substrates, shoring construction focuses on addressing issues such as slope collapse, water seepage, and substrate disturbance. We use standard piles 6–8 mm thick and 250–300 mm wide, combined with a static pressure installation method, to maximize protection of the fish pond’s original subgrade structure. Construction personnel meticulously inspect each pile to ensure tight interlocking of the joints; the sealed joints block seepage pathways and stabilize the slope soil, ensuring stable operating conditions for long-term water retention and aquaculture.
In channel construction, we focused on three core criteria for material selection: erosion resistance, aging resistance, and high uniformity. Water conveyance channels are subjected to long-term scouring by water flow and abrasion from sediment, while open channels also endure continuous weathering from natural elements. We uniformly selected modified PVC plastic-steel sheet piles with a thickness of 8 mm or greater; thanks to their thickened profile and weather-resistant material, they effectively withstand external wear and material aging. Construction crews employed standard pile-joining techniques for straight channel sections to ensure smooth and even channel walls. For high-risk sections such as curves and steep slopes, we specifically combined high-stiffness reinforced piles with reinforcement fittings to proactively counteract the impact of water flow, thereby completely eliminating channel defects such as deformation and collapse.
We select and install pile types in a layered and categorized manner based on the water-retaining height of the cofferdam and the intensity of the water flow load. For low-load temporary cofferdams under 3 meters, we use standard thickened U-shaped plastic-steel sheet piles to construct a simple, anchor-free support system, enabling rapid completion of construction and the reuse of materials, thereby effectively reducing project costs. For coffer dam scenarios involving extremely high water levels, significant elevation drops, and strong water flow impacts, the construction team proactively upgrades the configuration by selecting large-cross-section, high-stiffness piles, supplemented by tie-anchors and lateral bracing structures to reinforce the overall support strength and strictly control structural displacement and deformation. When encountering complex soil conditions such as soft soil or quicksand, we prioritize the use of high-interlocking pile sections to proactively prevent pipe flow and seepage hazards.
Throughout the entire selection process for plastic-steel sheet piles, we strictly adhere to the three key construction principles: suitability, safety, and cost-effectiveness. Prior to delivery, we conduct comprehensive inspections of the pile material, specifications, dimensions, and sealing performance to thoroughly eliminate substandard and non-compliant materials. Construction personnel precisely match pile types to actual on-site conditions, reasonably avoiding resource waste caused by oversized selections while eliminating structural safety hazards resulting from undersized selections. Scientific and standardized selection procedures effectively extend the service life of water conservancy projects, reduce operation and maintenance costs, and establish a stable and reliable support system for fish ponds, canals, and cofferdams.