The first condition for pitching on driven pile foundations over others is that the area/surface being dealt with has a layer of weak soil. Since the soil cannot by itself cannot hold up the weight of the building, the burden must bypass this layer and be shifted to the stronger soil layer or the rock, just below the weak layer of soil. This is the first acceptance criteria for going for driven pile foundations.
According to the design and design, the pile should be driven up to the hard soil layer, which is identified as the termination level. The termination level mainly depends upon the information provided in the soil investigation report.
Another condition for fixing such foundational piles is when buildings have exceptionally heavy concentrated loads- high-rise structures, bridges, and water tanks, just to name a few. In such a condition, one may be hyper-fixated on this alternative to fighting shy of overloading weight.
According to the design, the pile should be driven up to the hard soil layer, which is identified as the termination level.
The design of the driven pile and its selection of the termination level will be based on the information provided in the soil investigation report. When it reaches the termination level, the movement of the pile will get reduced.
Such driven pile foundations may very well be capable of shoring up higher poundage than those spread footings that distribute the weight. If you happen to live in an area that fulfills the above criteria, you may have to consider inserting such vertical columns.
The first and foremost reason for using such piles is because of their high bending and axial stress attributes.
Since these are compounded of adequate cover and grade of concrete, they aren't prone to any sort of deterioration. So, in this sense, they are more durable.
The minimum cover should be kept at 50mm for the durability requirements.
Use of Hard and sound aggregates, proper mix design, and compaction of the concrete should be done.
Over here,hard-driving trees, after their branches are gotten rid of, are used as foundational structures.
They have the following attributes: They lack the capacity to hold up enormous loads. They cannot stand hard driving, though they are capable of bearing applied forces and loads.
Since these are made off of wood, they may very well be easy targets for many species that feed on wood.
Construction of Driven Piles and How They Are Placed
The structure of such piles isn't complex. Driven piles, popularly known as precast piles, are readymade elements(timber, steel, cannot, or concrete) dumped deep into the ground or the soil structure of any area by the methods of percussion, vibration, or pressing. This activity is carried out using apropos machinery.
There are mainly two types of methods in constructing the driven piles: conventional methods and Hammer going ways.
In the conventional method of constructing the driven piles, the force is applied to the banks by a falling weight and falling into the bank. It should be ensured that the applied load should not exceed more than the capacity of the driven pile.
The second method is the Hammer-driven pile which is very easy compared to the conventional way. Generally, the precast piles are constructed with a length of 6m due to transportation issues.
If any constructor considers this method, they needn't be worried about the execution, and this doesn't take much time as they are impervious to local conditions.
The first advantage is that these driven concrete piles can be precast as per the requirements.
Driven concrete piles can be made in advance, as a result of which progress is fastened.
There's no extra work that one needs to be involved in post-completion, for the job is extremely neat today.
Since most of the activities at the site are handled by machinery, minimal supervision is required.
You won't need any extra storage space to keep the elements, machinery, and materials.
Driven piles are the best alternative in places where drilling holes is strictly prohibited for known and apparent reasons.
There's minimal to, and fro movement as everything is at the site, so you won't have to go to any other place as compared to other piling methods.
Since the equipment and installation methods are given the green signal in terms of quality and time-bound features, it is highly unlikely that something will go wrong.
These driven piles maintain their shape amidst the installation and post-installation as well.
The pile is driven into the granular soil, which compacts the adjacent soil mass and increases the bearing capacity of the pile.
The involvement of the technical staff in the construction of the driven pile is less.
There will be no effect of the groundwater table on the construction of the Driven pile.
The primary disadvantage of this alternative is that it requires advanced planning for getting the materials ready and also driving them off to the site.
The other demerit of such an alternative is the uncertainty of holding up burden during transportation and installation; for this, precast and prestressed concrete piles are required.
Sometimes, the length cannot be determined just by looking at the site, so in some cases, cutting off the extra parts may be required, which can impede progress.
Another disadvantage that we could think of is that these may not be suitable for places where there is a below-par drain tile system.
Another major downside to opting for such foundations is that they are extremely noisy while being installed, so the chances of neighbors knocking on the door are high. Following up, the vibrations caused by the machinery can compound the pre-existing loopholes in any house, and the neighbors can bring the reason for the piling vibration.