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Help CenterSteel Sheet & Plate & Steel Sheet Pile，S275JR、S355JR、S390GP、S430GP、SY295、SY390、A690、GB/T20933、EN10248、JIS A5528、JG/T196-2018
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1. Product Overview
Steel sheet piles are section steel components equipped with interlocking locks on both sides. Multiple sheet piles are interlocked via locks to form continuous watertight and earth-retaining walls. As core supporting materials for foundation pits, cofferdams, water conservancy and port projects, they are divided into two main categories: hot-rolled sheet piles (Larssen type, the mainstream for engineering) and cold-formed sheet piles. Featuring recyclable performance, efficient construction and outstanding water stop performance, they are widely adopted in various construction works.
2. Product Classification and Section Features
2.1 Classified by Production Process
Hot Rolled Sheet Piles (Larssen Sheet Piles)Manufactured by integrated high-temperature rolling, they feature high-precision locks, tight interlocking, strong bending resistance and excellent driving resistance without easy tearing.Application: Deep foundation pits, wharves, cross-sea cofferdams, permanent water conservancy projects and large heavy-load constructions.Main sections: U-type, Z-type and straight web (flat) type.
Cold Formed Sheet PilesRolled and shaped from steel strips at normal temperature, they come with thin plate thickness, flexible customized lengths and lower costs.Disadvantages: Ordinary lock tightness and prone to deformation under heavy loads.Application: Small temporary foundation pits, shallow cofferdams and short-term temporary support structures.
2.2 Classified by Section Shape
U-type Steel Sheet Piles (Most Popular Larssen SP Series)With a grooved U-shaped cross-section, they deliver balanced lateral rigidity, low driving resistance and superior lock water tightness. Standard single widths are 400mm and 600mm, including models SP-III, SP-IV and SP-IVw, covering 80% of civil, municipal and water conservancy projects.
Z-type Steel Sheet PilesBoasting ultra-high section modulus and outstanding bending resistance, they have wide single-piece width to boost construction efficiency. Suitable for deep-water wharves, large revetments, ultra-deep foundation pits and working conditions with high lateral earth pressure.
Straight Web (Flat) Steel Sheet PilesThe flat plate structure provides prominent lock tensile resistance, ideal for circular cofferdams, island enclosures and small shallow-water support, while its lateral rigidity is relatively low.
3. Steel Grades and Mechanical Properties
3.1 Domestic Common Grades (GB/T 20933-2014)
Q235B: Yield strength ≥235MPa, economical general grade for ordinary municipal temporary projects
Q355B / Q345P: Yield strength ≥345MPa, high-strength grade widely used for deep foundation pits and river cofferdams
Q390P / Q420P: Ultra-high strength steel for large ports, cross-sea water conservancy and heavy-load permanent structures
3.2 International Export Grades (EU & Japanese Standards)
EU Standard: S275JR, S355JR, S390GP, S430GPJapanese Standard: SY295, SY390, A690 (special marine anti-corrosion grade)Execution Standards: GB/T20933, EN10248, JIS A5528, JG/T196-2018
4. Standard Specifications of Hot Rolled U-type Larssen Sheet Piles
| Model | Width×Height×Thickness (mm) | Unit Weight (kg/m) | Section Modulus (cm³/m) | Application Scenarios |
|---|---|---|---|---|
| SP-III (Larssen Type 3) | 400×125×13 | 60 | 425 | Shallow foundation pits, small river cofferdams, temporary building support |
| SP-IV (Larssen Type 4) | 400×170×15.5 | 76.1 | 362 | Municipal deep foundation pits, bridge caps, inland river revetments |
| SP-IVw | 600×210×18 | 108 | 580 | Ports, deep-water cofferdams, large water conservancy projects |
Conventional delivery lengths: 6m, 9m, 12m, 15m; customized fixed lengths ranging from 6m to 24m are available, with cutting and beveling processing supported.
5. Core Product Advantages
Excellent Watertight Performance: Precisely interlocked locks can cooperate with water-stop strips to achieve zero leakage, applicable to underwater projects and sites with high underground water levels.
Rapid Construction: Direct pile driving by pile hammers without large-area excavation, greatly shortening construction duration for rush projects.
Reusable & Recyclable: No permanent concrete structures; piles can be pulled out and recycled after construction completion to reduce overall project costs.
Wide Site Adaptability: Constructable on soft soil, silt, sand and shallow rock layers with small occupation area, suitable for narrow urban construction sites.
Flexible Shape Matching: Can be assembled into straight, circular and arc cofferdams to fit various outlines of rivers, wharves and foundation pits.
Optional Anti-corrosion Treatment: Factory-applied black paint, coal tar epoxy coating and hot-dip galvanizing can extend service life in marine and sewage environments.
6. Wide Application Fields
Municipal Construction: Support for urban deep foundation pits, underground pipe galleries, metro and civil air defense temporary earth retaining works.
Water Conservancy & Flood Control: River embankment protection, flood cofferdams, sluices, reservoirs and river dredging enclosures.
Port & Marine Engineering: Wharf walls, breakwaters, artificial islands and cap construction for cross-sea bridges.
Road & Bridge Engineering: Water cofferdams for bridge construction and slope reinforcement of roadbeds.
Environmental Protection & Sewage Treatment: Anti-seepage walls for sewage tanks, tailings pond anti-leakage and river regulation projects.
Emergency Rescue: Temporary flood barriers during flood seasons, landslide support and rapid emergency cofferdams.
7. Surface Condition, Processing & Packing
Factory Surface State: Hot rolled black surface (standard); customized anti-corrosion coatings (anti-rust paint, galvanization) are optional.
Value-added Processing: Fixed-length cutting, end beveling, lock trimming, hole drilling, welding and anti-corrosion spraying.
Packing: Bundled with steel strips, 8–12 pieces per bundle with protective pads on both ends; shipped in containers or bulk carriers without outer packaging for sea transportation.
Weighing Method: Both theoretical weight and actual weighed weight are acceptable; factory material test certificates and quality guarantee certificates are provided.
8. Delivery Cycle & Logistics
In-stock standard specifications: Delivery within 5–7 working days
Special steel grades / ultra-long customized products: Delivery within 7–12 working days
Shipping Ports: Tianjin Port, Qingdao Port; full container, LCL and bulk cargo shipment available for global foreign trade orders
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