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Help CenterSteel Sheet & Plate & Steel Sheet Pile，PU10、PU12、PU16、PU22、FSP-IV
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1. Product Overview
Steel sheet piles, also known as Larsen sheet piles, are hot-rolled or cold-formed section steel with special interlocking clutches. They are driven into soil by pile hammers, and the interlocks engage with each other to form a continuous, watertight retaining wall. Widely applied in temporary support and permanent hydraulic structures, they feature high strength, reusability, fast construction and excellent sealing performance. They are the mainstream enclosure materials for foundation pits, river channels, ports and flood control projects.
2. Product Classification (By Forming Process & Cross Section)
2.1 Classification by Production Process
Hot-Rolled Steel Sheet Piles (Main Heavy-Duty Type)Manufactured in compliance with GB/T 20933-2014, formed under high-temperature rolling. They feature thick wall thickness, high clutch strength and outstanding bending resistance. Suitable for deep foundation pits, offshore docks, permanent retaining walls and high-water-head cofferdams, reusable for over 20 times. Ideal for heavy-load projects and complex geology with gravel or shallow rock layers.
Cold-Formed Steel Sheet Piles (Lightweight Economical Type)Rolled from steel strips at normal temperature, light self-weight, flexible specifications and lower cost. Mainly used for shallow foundation pits, river slope protection and temporary drainage trench support, applicable to shallow soft soil projects. Normally reusable for 8–15 times.
2.2 Classification by Cross-Section Shape
U-Type Steel Sheet Piles (Larsen Piles, Most Widely Used)U-shaped cross section with symmetrical central clutches for stable assembly. Standard models include PU10, PU12, PU16, PU22, FSP-IV, etc. Suitable for temporary foundation pits, bridge cofferdams, municipal drainage and medium & small river regulation, with sufficient stock available.
Z-Type Steel Sheet Piles (Heavy-Duty with High Bending Capacity)Z-shaped cross section with clutches arranged on both side edges, featuring larger section modulus and strong lateral bearing capacity. Applied to deep-water docks, seawalls, permanent flood walls and large-scale land reclamation projects, the preferred choice for long-term hydraulic works.
Flat Web Sheet Piles (Flat Piles)Flat plate surface with prominent clutch tensile resistance. Used for circular cofferdams, cellular dock compartments and fully watertight cabins, resisting water pressure via overall clutch tension.
Composite Steel Sheet Pile Walls (H-Beam + Sheet Pile Combination)H-beams serve as main load-bearing piles with sheet piles filled for water stop, greatly improving overall rigidity. Applied to ultra-deep foundation pits, large ports and sea-crossing cofferdams under high load conditions.
3. Material Grades & Mechanical Properties
3.1 Domestic Standard Materials (Regular Stock)
Q235B: Yield strength ≥235MPa, for shallow temporary support and ordinary municipal foundation pits
Q355B/Q355C: Yield strength ≥355MPa, general hot-rolled sheet piles, universal for river and bridge cofferdams
Q390B/Q420C: High-strength grades, specially for deep water, deep foundation pits and marine engineering
3.2 International Export Standard Materials
European Standard: S270GP, S355GPAmerican Standard: ASTM A572 Gr50, A690 (marine weathering steel)Japanese Standard: JIS G3114 SMA400/500
3.3 Core Mechanical Indicators
Tensile strength: 470–630MPa; Elongation after fracture ≥17%. Clutches are heat-treated for enhanced tightness, free of leakage under high water head. Good low-temperature toughness, stable construction under -10℃ ~ 55℃ ambient temperature.
4. General Specification Parameters
Effective width: 400mm, 600mm, 700mm, 750mm, 800mm
Web height: 100mm–500mm
Wall thickness: Hot-rolled 8–24mm; Cold-formed 6–12mm
Length: Standard fixed lengths 6m, 9m, 12m, 15m; customized maximum length up to 24m; 12m fits 40ft containers for export
Theoretical weight: 38–75kg/m; delivery by actual weighed weight or theoretical weight available
5. Optional Surface Anti-Corrosion Treatments
Standard hot-rolled black surface: Original mill scale, for short-term temporary projects with lowest cost
Anti-rust paint coating: For short-term outdoor use, anti-rust service life 1–3 years
Cold zinc spray anti-corrosion: For river and fresh water environments, anti-rust service life 5–8 years
Hot-dip galvanizing: For seawater and coastal high-salt environments, anti-corrosion service life over 15 years, the first choice for permanent hydraulic structures
6. Core Product Advantages
Excellent water stop performance: Precisely interlocking clutches; water stop strips can achieve zero leakage under high water head, no extra anti-seepage layer required for cofferdam and river projects.
Reusable: Pulled out by vibratory hammers after construction, reusable after rust removal and repair, greatly reducing comprehensive project cost.
Efficient construction & small occupation area: Fast driving and extraction with vibratory hammers, no large-scale earth excavation needed; construction period shortened by over 50% compared with concrete support.
Flexible layout: Assemblable into rectangular, circular and special-shaped closed cofferdams, adaptable to foundation pits, river channels, curved embankments and various structures.
Eco-friendly & recyclable: 100% steel recyclable, no construction waste, easy to restore original soil surface after completion.
Adaptable to various geology: Constructible in soft clay, sand and gravel layers; drill pre-holes available for shallow rock formations.
7. Main Application Scenarios
Municipal & Construction Engineering: Deep foundation pits of high-rise buildings, underground parking lots, metro trenches and pipeline excavation support
Water Conservancy & River Projects: River cofferdams, river embankment reinforcement, flood emergency rescue, pond anti-seepage and temporary water separation for reservoirs
Road & Bridge Infrastructure: Bridge cap cofferdams, subgrade slope protection and culvert foundation pit support
Marine & Port Engineering: Dock bulkheads, breakwaters, land reclamation and temporary offshore construction cofferdams
Emergency Rescue: Dyke breach blocking, collapsed foundation pit reinforcement and temporary flood retaining walls during flood seasons
8. Quality Standards Implemented
Domestic Standards: GB/T 20933-2014 Hot-Rolled Steel Sheet Piles, JG/T 196-2018 Steel Sheet Piles, GB/T 39721 Cold-Formed Steel Sheet PilesInternational Export Standards: EN 10248, ASTM A328, JIS G3194Supporting Certificates: Mill test certificate 3.1/3.2, factory mechanical test report, dimensional tolerance inspection record. Export certifications such as SONCAP, SASO can be provided upon request.
9. Packaging, Logistics & Delivery Cycle
Packaging: Bundled with steel strips, pile ends equipped with corner protectors to avoid clutch damage during transportation; sea container shipment (20GP for 6m piles, 40GP for 12m piles)
Warehouse: Spot warehouse at Tianjin Port, direct port shipment for export available
Delivery Cycle: Spot standard specifications shipped within 5–7 days; mass orders with special materials and customized lengths require 20–30 days
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Delivery Terms: Land truck transportation, sea container shipping; trade terms FOB Tianjin Port, CIF overseas ports acceptable
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