What is bored cast in situ pile?
What is bored cast in situ pile?
Bored piles are steel reinforced concrete elements cast in situ used to transfer high loads through soil to deeper, more competent soil or rock stratum. Constructed with conventional rotary kelly bar plant, the drilling tooling is selected to suit the nature of the soils to be excavated.
How are bored piles constructed?
Installing a bored pile starts with drilling a vertical hole into the soil, using a bored piling machine. The machine can be outfitted with specially designed drilling tools, buckets, and grabs to remove the soil and rock. Piles can be drilled to a depth of up to 60 meters and a diameter of up to 2.4 meters.
What is cast in situ concrete pile?
Cast in situ piles: Cast in situ piles are casted after a steel shell is driven into the ground which consists spirally wound hard drawn wire. After reaching a suitable depth the concrete is poured in it and left to harden. Generally, these piles work on the principle of friction.
Is code for bored cast in situ pile?
The bored cast-in-situ piles having bulb(s) known as under-reamed piles are covered in IS : 2911 ( Part III )-1980*.
How are bored piers installed?
Installing a bored pile starts with drilling a vertical hole into the soil, using a bored piling machine. Our rigs can drill to a depth of up to 26 meters and a diameter of up to 1.5 meters. Once the hole is drilled, a reinforced steel cage is lowered into the hole, then the hole is filled with concrete.
What is pile boring equipment?
Piling rigs. Piling rigs are mainly used to drill/create piles in soil, clay, etc. It is widely used for cast-in-place piles, diaphragm walls, and foundation reinforcement. It consists of a tabular element or hard box, placed and fixed on a crane base.
How deep are bored piles?
Bored piles can be drilled to depths in excess of 60m and typical diameters range up to 2.4m.
What do you know about cast in situ piles?
Cast-in-situ piles are those piles which are cast in position inside the ground. Since the cast-in-situ piles is not subjected to handling or driving stresses, it is not necessary to reinforce the pile in ordinary cases or in places where the pile is completely submerged in the soil.
What is the difference between bored pile and driven pile?
The fundamental difference between a driven pile foundation and bored pile foundation lies in their point of manufacture. A driven pile is formed off-site under factory-controlled conditions and a bored pile is manufactured on site and in place.
How is pile capacity calculated?
Step 2: compute the ultimate end bearing capacity (acting as individual piles). Ultimate end bearing capacity in clay = Nc × C × pile tip area (Nc = 9). Ultimate end bearing capacity in soft clay = 9 × 120 × π × diameter2/4 = 848.2 lbs/per pile. Total ultimate bearing capacity per pile = 76,920 + 848.2 = 77,768 lbs.
How are piers constructed?
Piers for bridges are often installed by the caisson method. The caisson is a hollow boxlike structure that is sunk down through the water and then through the ground to the bearing stratum by excavating from its interior; it ultimately becomes a permanent part of the completed pier.