Basement Wall Construction with Piles Quiz

Basement Wall Construction with Piles

• Piles are sub-structural elements resembling the form of a structural column used in construction as foundation support or basement wall construction system.
• Piles can be made of poured in place concrete, pre-cast concrete, timber or steel.
• The two main types of piles used in basement wall construction are Rotary Bored Piles and Continuous Flight Auger Piles.
• Both pile types use circular reinforced concrete construction, but the main distinction is how they are constructed.
• Rotary Bored Piles are constructed by progressively screwing a short steel helical cutting blade into the soil and removing it along with the cut soil.
• Once the excavation is completed, the reinforcing cage is placed inside, and the concrete is placed using the tremie method.
• Bored piles are ideal for almost all soil types and are suitable for supporting heavy loads but generate more vibration and noise compared to CFA piling.
• Bored piles are not suitable for soil conditions that comprise deep gravely or sandy soils and locations where the pile is required to extend below the water table.
• CFA Piles use a drill bit comprising a long steel helical cutting blade that runs the full length of its drill shaft.
• The pile is constructed by using the cutting blade to penetrate the soil to the required design depth, leaving the spoil in the hole and placing concrete as it rises out of the excavation.
• CFA Piling generates less vibration and noise compared to Rotary Bored Piling but has depth restrictions.
• CFA Piling is suitable for almost all soil types except for hard rock, and it is ideal for low headroom and restricted access sites.