When to Use Precast Pile Manufacturer？

The fundamental difference between a driven pile foundation and bored pile foundation lies in their point of manufacture. A driven pile is formed off-site under factory-controlled conditions and a bored pile is manufactured on site and in place.

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Bored pile foundations, also known as replacement piles, are typically poured in place and provide support for structures, transferring their load to layers of soil or rock that have sufficient bearing capacity and suitable settlement characteristics. Driven piles are sometimes referred to as displacement piles because in the process of driving the pile into the ground, soil is moved radially as the pile shaft enters the ground. There may also be a component of movement of the soil in the vertical direction.

With the benefit of using pile joints, precast concrete piles can be driven to lengths longer than 30m. Often concrete precast piles can be driven down to 30m, however, in special circumstances, such as offshore projects, piles can be driven down to a maximum of 150m.

There is no established depth for foundations; nor is there a simple way of determining suitable depths. Instead, there is a very wide range of foundation types and depths suitable for different applications, depending on considerations, such as:

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• The nature of the load requiring support
• Ground conditions
• The presence of water
• Space availability
• Accessibility
• Sensitivity to noise and vibration

Shallow foundations are suitable at a depth of around <2.5 m, any deeper and you would need to look at a suitable piling solution. If the foundations are to be in close proximity to an adjacent structure, care must be taken to ensure the excavation works do not undermine it, nor is additional pressure exerted upon it. The foundation may need to be at least the same depth as the adjacent building’s foundation base.

In addition to structural support, driven piles provide lateral support for retaining walls. The piles are advanced to design tip depth or nominal resistance using an impact or vibration hammer and are typically installed in groups and tied into a pile cap. When penetration of dense soils is necessary, pre-drilling is required for the pile to achieve the specified design depth. Driven piles can be made of timber, pre-cast concrete, steel H-piles, steel sheet piles, or pipe piles.

Piles can be installed as a single length or spliced for extremely deep piles. Driven piles do not create spoil, and since no curing time is required, they can be installed in sequence, speeding up the overall production time. The completed pile element resists compressive and lateral loads and uplift forces.

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