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Help CenterSteel Sheet & Plate & Steel Sheet Pile，SY295、SY390、Q355B、Q295WP、Q355WP、SYW295、SYW390
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1. Product Definition
Steel Sheet Pile is hot-rolled or cold-formed structural steel section with interlocking latches on both sides. Multiple piles interlock tightly to form continuous watertight retaining walls for foundation support, cofferdams, seawalls, flood control and land reclamation projects. The tight interlock provides excellent anti-seepage performance, and the piles can be extracted and reused repeatedly. It is divided into hot-rolled sheet pile and cold-formed sheet pile.
Domestic Standards: GB/T 20933-2021 Hot Rolled Steel Sheet Piles, JG/T 196-2018 Cold Formed Steel Sheet PilesInternational Standards: JIS A5528, EN 10248, ASTM A690
2. Classification by Production Process
2.1 Hot Rolled Steel Sheet Pile (Mainstream for Deep & Permanent Marine Projects)
Formed under high temperature rolling, featuring precise interlocks, thick web and high section modulus, superior bending, water sealing and soil/water pressure resistance. Suitable for deep foundation pits over 10m, port quay walls and permanent retaining structures.Main profiles: U-type (Larsen SPⅢ/SPⅣ), Z-type, straight web type.
2.2 Cold Formed Steel Sheet Pile (For Shallow & Short-Term Temporary Works)
Rolled from steel strips at ambient temperature, thin wall, low cost and flexible sizes. Interlock tightness is inferior to hot rolled piles, only applicable for shallow trenches, temporary small cofferdams and municipal minor excavation.
3. Main Section Profiles & Features
3.1 U-Type Sheet Pile (Larsen Pile, Most Widely Used)
Symmetrical U cross-section with latches on both webs, easy lifting, piling and extraction with balanced waterproof performance.Common sizes: 400×125, 600×180, SPⅢ, SPⅣ.Application: 8–12m deep foundation pits, river cofferdams, bridge caps, metro trenches, urban flood dykes.
3.2 Z-Type Sheet Pile (Ultra-Deep Pit & Heavy-Duty Marine Works)
Latches arranged on outer flanges, higher section modulus and bending capacity with same steel consumption, wider effective width to reduce total pile quantity.Application: Ultra-deep foundation pits, deep-water docks, large sea dykes, land reclamation permanent retaining walls.
3.3 Straight Web Sheet Pile (Specialized Anti-Seepage Partition)
Flat cross-section with high tensile strength at interlocks, limited bending resistance, mainly for water barrier function.Application: Impermeable curtains, small trench support, temporary water stop partition, cellular cofferdams.
3.4 L-Type Sheet Pile (Narrow Space Municipal Excavation)
Light angular profile, small occupation space, same-direction latches, ideal for narrow gaps between buildings, small ditches and farmland hydraulic support.
4. Standard Material Grades
Q235B / SS400 Carbon SteelMin yield ≥235MPa, good plasticity, for soft soil, shallow temporary cofferdams and short-term municipal projects.
Q355B/Q355C / S355GP Low Alloy High Strength Steel (General Main Grade)Min yield ≥345MPa, qualified low-temperature impact resistance, strong lateral pressure resistance, universal for deep pits, river and coastal ordinary projects.
Q390P / S390GP Ultra-High Strength Sheet PileMin yield ≥390MPa, for heavy load, high soil & water pressure, deep-water docks and large flood cofferdams.
Q355NQR Weathering Steel Sheet PileResist atmospheric and seawater salt fog corrosion, for long-term open-air and coastal permanent seawalls, reduce later anti-corrosion maintenance.
5. Complete Specification Parameters
Web Thickness: Hot rolled 8–24mm; Cold formed 3.0–12mm
Effective Width: 400/500/600/700/750mm
Section Height: 100–300mm
Single Length: 6m/9m/12m/15m/18m, custom cut-to-length & welded extension available
Optional Surface TreatmentHot rolled black scale, shot blasting, hot-dip galvanized anti-corrosion, interlock sealing coating
Matching Accessories: Corner piles, T-joint piles, waling beams, tie rods, piling driving caps
6. Core Product Advantages
Tight Watertight Performance: Precise interlock fit, zero leakage with sealing adhesive, realize dry construction for cofferdams and water-adjacent foundation pits.
High Strength & Stable Support: U/Z reinforced cross-section resists soil pressure, underground water and wave impact, prevent foundation collapse.
Reusable & Recyclable: Extractable after temporary construction, multiple circulation to cut overall project cost.
Fast Construction: Hydraulic piling machine drives piles rapidly, no large slope excavation, save site space and construction period.
Wide Working Condition Adaptability: Compatible with soft soil, sand, rock stratum, inland river and coastal seawater environment with matched steel grades.
Dual-Purpose for Temporary & Permanent Works: Carbon steel for temporary shoring; weathering or galvanized grades for permanent port and seawall structures.
7. Main Application Fields
Municipal & Building Foundation WorksDeep basement pits of high-rise buildings, metro tunnels, underground utility tunnels, garage trench support, urban pipeline excavation.
Water Conservancy & Flood ControlRiver regulation cofferdams, interception dykes, flood protection seawalls, reservoir temporary water retaining, farm ditch reinforcement.
Port & Marine EngineeringQuay walls, breakwaters, land reclamation, dock cofferdams, offshore wind power foundation water barrier walls.
Bridge InfrastructureBridge cap cofferdams, pier temporary water retaining, dry construction enclosure for cross-river bridges.
Emergency Rescue WorksFlood emergency protection, landslide temporary support, foundation pit leakage emergency blocking.
8. Export Packing, Lead Time & Delivery Documents
Packing: Piles stacked by same specification, fixed with steel strapping and wooden base support; model, grade and length marked on surface; waterproof anti-rust film covered for sea transportation.
Lead TimeStandard in-stock hot rolled U-type piles: 3–6 working daysCustom Z-type, weathering steel, galvanized & special length piles: 8–15 working days
Complete Delivery DocumentsMaterial Test Certificate (MTC), Mechanical Property Test Report, Factory Dimension Inspection Certificate, Spectral Chemical Composition Report
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