Foundations are primarily meant for establishing the structure in a better way. The aim is to shift the loads into the soil. However, the concerned layer upon which the load shifting has to be transferred must possess enough ability to bear it.
What is Pile Foundation?
Being specific about pile foundation, this is a profound foundation, which is primarily a slim column made up of the elements like concrete. It can be of the enlarged cylindrical structure, as well. The prime purpose of using materials like steel and concrete is to deliver the weight at the required depth. This can be done through end bearing method or skin friction method.
Timber can also be used with concrete and steel. The pile foundation is something where the depth is thrice (or even more) in comparison with its breadth. Pile foundations are mostly preferred for huge structures. It is recommended specifically at those instances where the soil at the desired depth is not capable of resisting the greater load.
Types of Pile Foundations as per Construction Method
- Driven Pile Foundations
Materials used in Driven Pile foundation are concrete, steel, and timber. However, these piles have to go through the prefabrication stage before being placed at the desired site of construction. On those occasions where concrete is made use of are called precast.
- Cast-in-situ Pile Foundations
Cast-in-situ pile foundations are made by creating holes within the ground at the desired depth. It is then filled with concrete. As per the need, reinforcements also have to be made use of.
- Driven and Cast-in-situ Piles
In the case of driven and cast-in-situ piles, a steel shell is made inserted within the ground with the support of a mandrel, which is put within the shell. It is here to mention that the diameter of the steel shell has to be as of the pile.
Types of Pile Foundation By the usage or functionality
- Sheet Piles
The prime aim of the sheet pile is to ensure additional support. These are meant for resisting the additional pressure coming through the factors like slack soil, water flow, etc. These are highly preferred for shore protection. There is an equal level of demand for it for cofferdams as well. It is recommended to be used for the construction of the existing walls and ensuring security assurance from the possible erosion of river banks. The pile can be significant for retaining the wobbly soil across the trenches of the foundation.
- Load Bearing Piles
The main aim behind the usage of these piles is to deliver the vertical pressure from the structure within the soil. The foundations of such deliver load over a layer that holds the ability to withstand it. By the strategy of the load transferring process within the soil, load-bearing piles are made accordingly.
- End Bearing Piles
In the case of end-bearing piles, the loads have to enter through the bottom level of the pile. This extreme below a layer of the pile sits over a comparatively tougher surface of the preferable rock. In general, it remains over the transition stage of a feeble and a tough slayer.
The gross ability of these types of piles can be measured through the formula, which is to multiply the pile tip with the ability to bear at the specific soil depth where the pile gets established. This calculation is made mostly by keeping the safety aspect in mind.
- Friction Pile
This pile delivers weight through the structure within the soil generated through the force that is generated between the concerned pile surface, and the soil covering the pile. The soil can be sandy or usual tough clay. This force of friction can be generated for the whole pile length. It can also be generated for a certain pile length, by the type of soil.
Here the whole pile surface is meant to deliver the load into the soil. The evaluation of skin friction generated over the surface of the file has to be calculated, keeping the safety aspects in mind. However, one can increase the diameter, the intensity, and a number of it as well to increase the roughness of the surface to develop the ability of the entire pile.