STEEL PIPE PILES
The steel pipe piles of NIPPON STEEL are used in many fields and have acquired high market acceptance due to their excellent product quality and construction efficiencies that derive from their use.
NIPPON STEEL, drawing a wealth of rolling, fabrication and construction methods in this fields, which have also won for the company a high reputation.
Based on an accumulation of technical expertise, NIPPON STEEL has developed and placed on the market solution proposal using all our available products at a maximum.
NIPPON STEEL will continue its efforts to develop novel products that bring the properties of pipe piles into full play and to respond to more stringent and diversifying user needs in the future.
Products
Steel Pipe Piles / Steel Pipe Sheet Piles
Steel pipe piles and steel pipe sheet piles are widely used in ports/harbors (piers, seawalls, and breakwaters), urban civil engineering (earth-retaining walls and cofferdams), bridges (foundations for steel pipe sheet pile foundations), and other applications, along with widening their applications due to enlargement of the structures sizes, growth of water depth for the structures and increase in construction work at sites where the bearing strata are deep under thick soft ground.
Features
1. Large vertical-bearing capacity
By driving the pipe piles into firm bearing layers, they exhibit a large vertical-bearing capacity.
2. High bending strength
Steel pipe piles with high stiffness and high bending strength enable resistance to considerable horizontal force during earthquakes.
3. Excellent environmental performance
Piles with small section areas realize less earth removal and low vibration and noise.
4. Custom fit for each structure
Various pile lengths, diameters, and thicknesses contribute to economical design.
5. Easy production of longer piles and jointing piles
Longer products can be manufactured, and, as joining piles by welding is also easy, it is possible to apply these to deep water and deep underground structures.
6. Easy jointing with superstructures
Jointing with upper concrete structures is easy, using reinforcing steel bars at the top of piles.
7. Easy handling
Steel that’s light and tough contributes to easy handling and transport.
| Percussion method | Vibratory hammer method | Inner excavation method | Steel pipe and soil-cement hybrid pile method | Rotating pile method | Cast-in-place pile method | |
|---|---|---|---|---|---|---|
| Reduction in construction waste soil | ◎ | ◎ | ○ | ○ | ◎ | × |
| Effect on groundwater and soil | ◎ | ◎ | ○ | ○ | ◎ | △ |
| Recyclability | ◎ | ◎ | ○ | ○ | ◎ | × |
| Low vibration and noise | × | △ | ◎ | ◎ | ◎ | ◎ |
| Durability and earthquake resistance | ◎ | ◎ | ◎ | ◎ | ◎ | ○ |
Steel Pipe Sheet Pile Foundation
A steel pipe sheet pile foundation is constructed by combining and installing steel pipe sheet piles in an enclosure shape. This can also be used for temporary cofferdams.
Features
- 1Foundations possible to be used both for temporary cofferdams and for permanent foundations can reduce construction periods and costs.
- 2A group of steel pipe sheet piles moves together, which can provide high horizontal resistance and vertical bearing capacity, along with reducing the occupied area at the same time.
- 3Using the interlocks of high shear strength can further reduce the size of foundations. The foundation can also be used for seismic retrofitting of bridges.
Slip Layer Pipe Pile
Special bitumen materials are applied to the surface of steel pipe piles to significantly reduce the negative friction that is transmitted to the steel pipe piles through the shearing deformation of slip layers.
Mechanical Joint
For the vertical joint of piles at construction sites, these joints can reduce the construction period at actual sites compared to that of weld joint, which is commonly used. In addition, products with stable quality are ensured by factory production. They can be constructed regardless of weather.
For further product information
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