Any design project’s installation procedure and methods are crucial, in keeping with the importance of the design process. To protect the foundation’s structural integrity and maintain careful consideration of the assembly methods and equipment, it is necessary to carefully consider the damage to the piles. Displacement and non-displacement methods are covered in detail in this article’s content.
Displacement Piles ( Pile Driving Methods )
Pile driving methods, a set of movement pile installation techniques, encompass many approaches to achieve right pile infiltration and consolidation. These methods include dropping weight, explosion, vibration, jacking ( limited to micro-piling ), and jetting.
Fall Hammer Method of Pile Driving
A hammer is raised to a suitable level before being released to attack the mound head, roughly a match to the weight of the pile. This simple approach is especially useful for mild frames and test piling situations where bringing heavy equipment, such as compressors or steam boilers, may not be practical. Cut hammers come in two main forms: single-acting gas or compressed-air hammer and double-acting pile hammers. A large cylinder is raised by heat or compressed air before being released onto the pile head in a single-acting hammer. Double-acting hammer, which can be driven by heat or compressed air, are primarily used for sheet mound driving, eliminating the need for a piling body.
Figure-1: Pile driving using nail
Pile Driving by Vibrating
Vibratory hammers, usually powered by electricity or hydraulics, use contra-rotating eccentric masses within a cover attached to the mound mind. These hammers ‘ ability to reduce the body friction on the pile’s factors is enhanced by the noise produced by these hammer, which is particularly useful in sandy or gravelly soil conditions.
Jetting
Water is used to facilitate the infiltration of piles, mainly sand or gravel gravel, during jitting. However, its effectiveness is limited in firm to tight soils or soils containing coarse sand, pavement, or boulders.
Boring Methods ( non-displacement piles )
Non-displacement pile setup methods, such as tedious methods, offer an alternative strategy to foundation construction. Continuous Flight Auger ( CFA ) is a prominent method in this category.
Continuous Flight Auxiliary ( CFA )
A smart base carrier with a hollow-stemmed trip auger that is retracted to the ground to the desired depth is part of the CFA equipment. As concrete is then removed, the aircraft auger is used to form the pile. To avoid soil collapse and maintain appropriate pile formation, careful cooperation between corkscrew rotation and concrete flow is essential. CFA is especially effective in soft surface conditions, allowing for pile installation across a range of soil types in various sizes.
Number 2: Constant Trip Auger Process
Underreaming
The auger-bored piles ‘ underreaming process involves expanding the pile’s center to make the most of the appropriate strata’s bearing power. This technique is usually employed in tight to hard clays, such as the London clay, where the soil you have unfounded. After installation, assessment of the wheel and underream of the clump is important to maintain structural integrity.
Figure 3: a ) Hydraulic rotary drilling equipment b ) Continuous Flight Auger, c ) underreaming tool open position
For the balance and long-lastingity of buildings, pile foundation installation requires careful planning and execution. Design professionals can properly address site-specific challenges and improve the performance of mound foundations by understanding and implementing correct installation techniques.
