How are pile caps constructed?
How are pile caps constructed?
Pile caps are constructed by excavating an area around the group of piles to enable formwork to be inserted. The pile tops may be trimmed to ensure they are at the same height. A reinforcement cage is then built and positioned in the formwork cast box and fastened to the piles.
What does pile cap means in construction?
A pile cap is a thick concrete mat that rests on concrete or timber piles that have been driven into soft or unstable ground to provide a suitable stable foundation.
How are piles constructed?
Step 1: a hole a little larger than the pile diameter and the full length of the pile is dug into the ground using an apparatus like a soil boring machine. Step 2: a precast concrete pile is lowered or pushed into the hole. Step 3: a concrete grout is poured into the gap between the pile and the earth.
What is pile cap and its functions?
Pile caps are dense reinforced concrete mats that sit over “concrete or wooden piles (driven, bored, or cast-in-place) to provide foundation stability. The major aim of the pile cap is to transmit the load of the columns to the underlying piles, which is usually too large for large buildings.
How do you design a pile?
Key factors to be considered in the pile foundations design are summarised as follows.
- Evaluate the geotechnical capacity and structural capacity of the pile and take the less as pile capacity.
- Divide pile capacity by the applied load (column load or applied load; serviceability limit state) to find the number of piles.
How do you install a piling hat?
How Do I Install Piling Caps?
- Measure about ¾” up from the bottom of the cap and drill 4 small holes around the perimeter.
- Place the cap on the piling and make sure it’s sitting level.
- Run the nails or screws through the holes and into the piling just until the head of the nail or screw touches the cap, then stop.
Is pile cap necessary?
Pile cap Necessity. Pile is necessary when the bearing capacity of soil below the structure is insufficient for a spread footing. It transfers the load to deeper, firmer strata. Piles used where the soil particularly affects by seasonal changes, to transfer the load below the level of such influence.
How are pile caps measured?
Wrap a length of string around the top of your pile (where a piling cap would go), and mark the length of the string (or cut it). Measure the string and then divide that number (the circumference) by 3.14159 (pi) to get the diameter of your pile.
What is the process of piling?
Piling is the process of drilling foundations through the ground to provide more structural strength to the weak soil underneath. Piling prepares the ground to carry heavy loads, such as a new home, office complex, road or another piece of infrastructure.
How big is a pile cap?
The normal minimum depth of pile caps is generally 600mm. Pile caps range from 600mm to 2000mm, but that depends of the design and site constraints. It is important to consider the depth of a pile cap when accounting for the anchorage of column reinforcement and pile reinforcement into the pile cap.
What is pile foundation PPT?
Pile foundation • Pile foundation is that type of deep foundation in which the loads are taken to a low level by means of vertical members which may be Timber Concrete steel. 6. Uses of Piles • The load of the super-structure is heavy and its distribution is uneven. • The top soil has poor bearing capacity.