The Advantages And Disadvantages Of Pile Foundations

Piles make of metal, concrete,  or timber. Concrete pile is precast, which can be found at the construction site or at a manufacturing point. The piles are drive into ground vertically or at a predetermined angle to the vertical when laying the pile foundations. A pile hammer uses to drive the piles into ground displacing soil in equal volume to the mass of the pile.

Pile Foundations

The soil around the piles becomes compact as the dislodge soil particles force into the adjacent spaces in the mass of soil resulting in the densification of the surrounding mass of soil. The pile used for compacting the adjoining soil known as a compaction pile. The bearing capacity of a precast pile increase due to the pressure generated by the surrounding mass of compacted soil.

Advantage of Pile Foundations

The poor drainage qualities of saturated, cohesive, or silty soil make it impossible for the soil to densify around the pile. The water in the pores makes it hard for the displaced soil particles to enter the void spaces. This action generates stresses in the mass of soil next to the pile when it drove into the ground. And the stresses are an outcome solely created by the water in the pores. As a result, the pore water pressure decreases the bearing capacity of the soil surrounding the pile.

Disadvantage of pile foundation

The soil around the piles remolded and will lose some substantial structural strength. In effect, the result of driving a pile in silty, cohesive, or saturated soils is a decrease in the bearing strength. But with time, the remolded soil will regain the lost strength as the disturbed soil particles reoriented (what’s known as thixotropy). Which arises from the consolidation of the mass.

Advantage or disadvantage of pile foundation

The Advantages Of Using Piles

  • They can be precast to specifications.
  • They can be pre-made into any length, shape, and size and used on-site thus reducing the completion time.
  • A screw pile foundation bearing capacity increase when it drove into the granular soil because the adjacent mass of soil is compact around the pile.
  • The piles give a clean and neat presentation thus requiring minimum supervision and less storage space.
  • The piles uses in places that do not allow drilling of holes because of borrowing and finding pressurized underground water tables.
  • They are a great choice when working over water as is the case with piles in jetties and wharf structures.

The Disadvantages Of  Using Pile

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  • Adequate reinforcement of the precast concrete piles is necessary as this helps to make them bear stresses of being transport.
  • Adequate pre-planning is essential for the proper handling of the pile when drive into the ground.
  • The process of driving piles requires heavy equipment.
  • It is hard to determine the require length of the pile in advance; therefore, the process will involve the addition of more lengths or cutting off of the excess, and this increases the project cost.
  • The piles are not suitable for soils with poor drainage. It the driving is on arrange and phase properly, the heaving of the soil or an already drive pile popping up when the new one is push in may occur.
  • Driving the piles generates vibrations that can affect the integrity of the foundations of neighboring structures.

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