7 Most Important Things about Screw Piles
A pile is a vertical structural element of a deep foundation, driven deep into the ground at the building site. It provides strong foundation to materials on the surface. Prefabricated piles are driven into the ground using a pile driver. Driven piles are either wood, reinforced concrete, or steel. Screw piles also known as helical piles are not a new age technology. It has been in use since a long time. In the beginning when it was introduced, it was originally used as piling foundations for lighthouses and piers. Slowly, steel piles were used for commercial purposes and in civil construction.
The piles are made of circular hollow steel sections with one or more helices attached to them. Screw piles cut into the soil following a constant pitch, as opposed to auguring through it. The helical flights and shafts are specifically designed to suit the ground conditions.
Once the pile has reached the target depth it remains permanently in place and is typically filled with concrete. Installation of these screw piles is comparatively easier and fast.
Track excavator or a mini-excavator equipped with an appropriately sized low speed high torque hydraulic motor. There is no need to mobilize special equipment, such as a crane with a pile hammer or a large drilled shaft rig. This makes for fast and inexpensive mobilization.
Using Screw Piles has less effect on sites where other structures already exist. Screw piles are screwed into the ground and not driven which eradicates vibrations associated with driving or hammering standard piles into the ground which causes small quakes and ground movement which can damages existing structures.
This is a technology is environment friendly as it does not require pre excavation which avoids disposal of tailings. Also, it does not demand removal of soil, thus maintaining the ecological balance. This conserves natural resources and energy and reduces the overall carbon footprint. Screw-piles are especially useful for support of temporary structures since they can be removed and reused with little to no change in structural integrity. It is also advisable to used screw piles at another site.
As this technology does not involve excavation, it eliminates various expenses such as post drilling clean process and the removal of contaminated soil.
Many manufacturers of screw-piles use high quality recycled steel to in their fabrication.
Modern screw piles used in civil construction is also available in wide range of foundation elements and geometries. Today, the application of screw piles in Melbourne has increased tremendously.