ProStruct

NIPPON STEEL

STEEL PIPE PILES with ribs × Sat-in Pile Foundation

  • Rapid and Reasonable
  • Useful and Reliable
  • Eco-friendly and Sustainable

A sat-in pile foundation involves a method in which the pillars of the buildings are driven directly into the foundation piles for which a special type of steel pipe pile with projections in the inner surface (inner ribs) in used, so that the pillars and the foundation piles are connected.

STEEL PIPE PILES with inner ribs

STEEL PIPE PILES with inner ribs

Sat-in Pile Foundation

Sat-in Pile Foundation

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Advantages of STEEL PIPE PILES with inner ribs ×
Sat-in Pile Foundation

  • Reduction in construction cost and periodNo footings need to built, reducing earth removal.
  • High structural reliability and qualityA disgn method has been established, and certification has been obtained.
    Welding can be carried out at the site of the nearby yard or shop.
  • Environmental impact reductionSolve environmental problems related to waste soil disposal by redusing earth removal.

Examples of application

Construction period

Reduction of around 30 to 40%(less concrete work)

Construction cost

Construction cost

Established disign method

Nippon Steel have obtained certification not only in Japan but also overseas (DNV Technology Qualification).

Comparison per 200m width

Examples of application

Construction cost

Customer Evaluation

JGC Corporation applied technology of SAT-in Pile Foundation to pillar-to-pile joint structure (structure via steel socket (stub joint)) of the Ichthys LNG Project.
The elimination of footings reduced the amount of work required for on-site foundation construction (excavation, steel bar works, formwork, etc.),and despite long rainy season and labour shortages in the area, the foundation work was completed on schedule, and this was evaluated as having cost benefits.
In addition this method is expected to be applied in cases where poor ground conditions require pile foundations, or where it is difficult to construct bored piles in areas with high rainfall.

(https://www.jgc.com/en/business/tech-innovation/tech-journal/pdf/jgc-tj_05-02_(2016).pdf（Japanese）)