CFA piles are known by many other names like continuous flight auger piles, auger piles, or cast-in-place piles. CFA piles are used to provide structural support to mega structures like large skyscrapers and buildings. Older ways of this structural support were not good enough to provide support after a certain amount of strain. But with these new CFA piles, civil engineers find a great way to deal with enormous strain in high-rise buildings. Not just as a support for buildings but it is also used as earth retention, especially on the site boundaries of adjacent buildings.
These CFA piles are very important to prevent many disastrous events like landslides. Apart from CFA piles, many other methods are combined to strengthen the structural support.
Process Of CFA Piling
The process of CFA piling is not a complex process to understand. It’s constructed by rotating a hollow steam continuous flight auger into the soil to a designed depth. These hollow steam are used to pump the concrete or grout. With maintaining the head pressure, this concrete is being set while the augers are gradually removed. It will create a cylindrical long structure of concrete that is strong enough to support tons of weight of high-rise buildings.
It should be noted that a stable and continuous pressure is very important to create a continuous cylindrical pile that is free from any defects. The reinforcement cage is placed through the freshly placed concrete. After the concrete, a cage-like steel structure is also used as reinforcement. The minimum height for these cage-like steel structures is six meters but longer reinforcements can also be used. In many places, a vibrator team is also assigned to accurately place the reinforcements and free the concrete from any air bubbles and other possible defects.
Advantages
There are numerous advantages of using CFA piles in mega structures. Not just a strong foundation for building or to prevent any possible landslides but CFA piles is possibly the only methods that provide such an enormous foundation with low cost. Many civil engineers suggest this CFA pile just because it offers a cost-effective foundation solution. Foundation with CFA piles resists compressive, uplift, and lateral loads. CFA piling can reach up to the depth of whooping 30+ meters with a decided diameter of piles. Traditional ways of boring piles are no match for this fast and strong foundation alternative.
