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Help CenterSteel Sheet & Plate & Steel Sheet Pile，Q235B、Q345B、SY390
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Detailed Description of Steel Sheet Pile Products
As a steel section component with multiple functions of support, soil retention and water stop, steel sheet piles are widely used in municipal, water conservancy, road and bridge, construction and other fields due to their stable structure, efficient construction and recyclability. They are the core materials for various foundation pit projects, hydraulic structures and temporary support. This description will comprehensively analyze the product characteristics of steel sheet piles from the aspects of core product information, classification, specifications, advantages and applications, providing reference for project selection and application.
I. Product Overview
Steel sheet piles are lock-equipped steel sections processed by hot rolling or cold bending. Their core feature is that both sides of the pile body are equipped with precision lock joints. During construction, steel sheet piles are driven into the ground one by one by special machinery, and the lock joints are interlocked and connected to form a continuous and airtight support wall, which can effectively resist lateral soil pressure, prevent groundwater seepage, and provide a safe and stable working space for foundation pit excavation and structural construction. The product has both temporary and permanent use value, and can be flexibly selected according to project needs, adapting to different geological conditions and construction scenarios.
II. Product Classification and Characteristics
Steel sheet piles can be divided into different types according to processing technology and cross-sectional shape. Each type of product has its own emphasis on performance, cost and applicable scenarios, which can meet the differentiated needs of different projects.
(I) Classification by Processing Technology
Hot-rolled Steel Sheet Piles: Adopting one-time hot rolling forming process at high temperature, the material is uniform and dense, with high lock joint precision, tight interlocking, excellent overall strength, bending resistance and durability, and can bear large soil pressure and water pressure. This type of steel sheet pile has a long service life, can be recycled and reused, and is suitable for deep foundation pits, high water pressure environments, permanent projects and scenarios with high requirements for support strength. It is currently the most widely used type in projects.
Cold-formed Steel Sheet Piles: Made of thin steel plates through cold bending forming process, with short production cycle, low cost, strong construction flexibility, and can be customized to special lengths and specifications according to project needs. Its strength is slightly lower than that of hot-rolled steel sheet piles, and its waterproof performance is relatively weak. It is mainly suitable for temporary shallow foundation pits, small municipal support projects, temporary enclosures and other short-term use scenarios.
(II) Classification by Cross-sectional Shape
U-type Steel Sheet Piles (Larson Piles): The cross-section is U-shaped, the lock joint is located in the center of the pile body, with symmetrical structure, excellent bending resistance, outstanding water stop effect and convenient installation. As the most general type of steel sheet pile, it is suitable for various scenarios such as foundation pits with depth of 6-12m, cofferdams, river revetments and underground pipe corridors, accounting for more than 80% of the total market application.
Z-type Steel Sheet Piles: The cross-section is Z-shaped, the lock joint is set at the edge of the pile body, with high section modulus and strong bearing capacity, which can effectively disperse soil pressure. It is suitable for engineering scenarios with extremely high requirements for support strength such as heavy load, deep water, large docks and ultra-deep foundation pits.
Straight Web Steel Sheet Piles (Flat Sheet Piles): The cross-section is straight plate shape, with high lock joint strength, tight interlocking and good overall stability. It is mainly used for special-shaped support projects such as circular cofferdams, honeycomb support structures and port wharf revetments.
III. Common Specification Parameters (Mainstream U-type/Larson Series)
The following are the most commonly used specifications of U-type (Larson) steel sheet piles in projects. Special lengths and thicknesses can be customized according to foundation pit depth, geological conditions and load requirements. The materials are all high-quality steel that meets national standards to ensure stable product performance.
Model |
Cross-sectional Dimension (mm) |
Weight per Meter (kg/m) |
Applicable Scenarios |
Larson Type III |
400×125×13 |
60 |
Medium stiffness, suitable for foundation pits with depth of 6-9m, small cofferdams and municipal shallow foundation pit support |
Larson Type IV |
400×170×15.5 |
76.1 |
High stiffness, suitable for deep foundation pits with depth of 9-12m, hydraulic cofferdams and large municipal projects |
Larson Type V |
420×220×23 |
100 |
Heavy-duty specification, suitable for ultra-deep foundation pits, port wharves and permanent projects with high water pressure |
Supplementary Notes: The standard lengths are 6m, 9m, 12m and 15m, and the maximum customized length can be 24m; the commonly used materials are Q235B (for general working conditions), Q345B (low-alloy high-strength, suitable for complex geology) and SY390 (special material for steel sheet piles, with stronger durability).
IV. Core Advantages of Products
Excellent Water Stop and Seepage Prevention Effect: The lock joints are precision processed and tightly interlocked, which can form an airtight seepage-proof wall, effectively preventing groundwater seepage, reducing auxiliary processes such as foundation pit dewatering and curtain grouting, lowering project costs, and avoiding the impact of groundwater loss on the surrounding environment.
Recyclable and Green Economy: Steel sheet piles can be pulled out and recycled for many times, with the number of recycling times reaching more than 20, which greatly reduces steel waste, lowers project material consumption costs, and conforms to the industry trend of green building and low-carbon construction.
Efficient and Convenient Construction: Using special equipment such as vibratory hammers and static pressure hammers for construction, the construction speed is fast, the installation time of a single pile is short, the occupied area is small, no large amount of earthwork excavation and dreg transportation are required, which can effectively shorten the construction period and reduce the interference to surrounding traffic and environment.
Wide Application Range: It is suitable for various geological conditions such as soft soil, sandy soil, silt and silty clay. The depth of foundation pit support can reach 7-12m (can be further deepened with multiple supports), which can meet the support needs of various projects such as municipal, water conservancy, road and bridge, and construction.
Safe, Stable and High Reliability: The pile body has high overall stiffness and small deformation, and the support structure is stable. It can adapt to the safety levels I, II and III of the foundation pit side wall, effectively resisting risks such as soil collapse and piping, and ensuring construction safety.
Outstanding Cost Performance: Compared with traditional concrete support and steel sheet pile support, it has both cost advantages and construction advantages. Temporary projects can be recycled and reused, and permanent projects can reduce later maintenance costs, with higher comprehensive cost performance.
V. Typical Application Scenarios
With its multiple advantages, steel sheet piles are widely used in various engineering fields, and the specific scenarios are as follows:
Municipal Engineering: Underground pipe corridors, comprehensive pipe trenches, subway foundation pits, urban road reconstruction and expansion foundation pits, sewage treatment plant foundation pit support and water stop projects.
Water Conservancy and Port Engineering: Wharf revetments, docks, cofferdams, river revetments, flood control walls, reservoir reinforcement, pump station foundation pits, etc., which can effectively resist water flow scouring and water pressure.
Road and Bridge Engineering: Pier cofferdams, abutment support, subgrade reinforcement, bridge foundation pit excavation support, especially suitable for water construction of cross-river and cross-river bridges.
VI. Implementation Standards
The production and inspection of products strictly follow relevant domestic and foreign standards to ensure that the product quality meets engineering requirements. The main implementation standards are as follows:
National Standard: GB/T 20933-2007 "Hot-rolled U-type Steel Sheet Piles"
Japanese Standard: JIS A 5528 (Hot-rolled Steel Sheet Pile Standard)
European Standard: EN 10248 (General Technical Standard for Steel Sheet Piles)
American Standard: ASTM A328 (Specification for Hot-rolled Steel Sheet Piles)
VII. Delivery and Packaging Instructions
Delivery Status: Delivery can be made by theoretical weight or actual weight, supporting customized fixed-length specifications. Relevant documents such as product quality inspection reports and material certificates are attached during delivery.
Delivery Cycle: 5-7 days.
Packaging Method: Bundled packaging is adopted, 10-20 pieces per bundle. Protective sleeves are installed at both ends of the pile body to prevent lock joint damage during transportation; according to customer needs, the pile body can be painted, hot-dip galvanized and other anti-corrosion treatments to extend the service life.
Transportation Instructions: Transported by flatbed trucks, placed reasonably to avoid extrusion and collision, ensuring that the products are intact when arriving at the site.
In summary, steel sheet piles are an efficient, environmentally friendly and reliable support material. Different types and specifications of products can be flexibly selected according to the specific needs of the project, providing a safe and convenient solution for engineering construction. For further details on product selection, construction plans, etc., please feel free to consult.
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