Yangshan Deep-Water Port
Hangzhou Bay, Shanghai
Steel engineered for coastal conditions, contributing to the strength and durability of Shanghai's offshore container port.
View projectEmbankment Structure
Quay walls, river banks, flood defences and piling.
Overview
Embankments, quay walls and flood defences sit in soil and water for their whole service life, often with changing water levels and salinity. Large-diameter spiral pipe is widely used for piles, plate for retaining and anchor details, and rebar and mesh for the concrete works.
These jobs are often long and linear, so material usually arrives in phases. The supply plan needs to follow piling progress and site access, including any barge or restricted-road delivery.
Where each steel product is used
| Structure | Steel product | Typical grades / standards |
|---|---|---|
| Piles and pile walls | Spiral welded pipe | Q355 / S355J2H, API 5L Gr.B–X52 |
| Retaining and anchor details | Medium and heavy plate | Q235B / Q355B |
| Capping beams and concrete walls | Rebar | HRB400, GB/T 1499.2 |
| Slabs and slope protection | Welded steel mesh | GB/T 1499.3 |
Grades shown are typical examples. The project's design documents and applicable codes decide the final specification.
Common standards: GB/T 9711, API 5L, EN 10219
What the project needs
- Large-diameter pipe for piling
- Anti-corrosion coatings for soil and water exposure
- Long lengths delivered in project batches
What to consider when selecting steel
Corrosion zone
The splash and tidal zones are usually the most aggressive. Coating, extra wall thickness and cathodic protection are often combined, based on the design life.
Driving and handling
Wall thickness must work for pile driving as well as for the final load. Coated pipe needs suitable handling and stacking to avoid coating damage.
Length and joints
Long piles may be spliced on site. Agree the length, end preparation and weld details before production.
Recommended products
What to include in your inquiry
- Pipe outside diameter, wall thickness, length and grade
- Coating type and thickness, if needed
- End preparation for site welding
- Delivery phases and unloading method at the site
Frequently asked questions
Why use spiral pipe for piling?
Spiral pipe is a practical way to make large diameters and long lengths. Suitability still depends on the pile design and the required standard.
Which coatings are used for buried or marine pipe?
Epoxy and polyethylene-based systems are common. The designer should select the system based on the soil, water and service life.
Can deliveries follow the construction schedule?
Phased delivery can be discussed at the quotation stage. Share the construction programme so that production and shipping can be planned.