It’s no secret that drilling foundation holes can be a challenging task. The earth is complex, and there are often obstructions like rocks and roots. That’s where Kelly bars come in. These simple tools can make all the difference in your drilling success. Here are just a few of the ways they can help.
What are telescopic Kelly Bars, and what do they do?
Telescopic Kelly bars are an essential part of the equipment used by drillers to construct deep foundation drilled shafts. The basic one consists of several connected steel tubes, with the innermost tube attached to the drilling rig.
As the Kelly bar lowers into the drilled shaft, the tubes slide over each other, extending the Kelly bar to its full length. This gives the driller greater control over the depth and direction of the drill bit, allowing for more accurate drilling.
In addition, you can use it to rotate the drill bit, providing even greater control over the drilling process. As a result, telescopic Kelly bars are essential for any driller looking to create deep foundation drilled shafts.
Why telescopic Kelly Bars Are Vital For Foundation Drilling
Below we mentioned the importance of these kelly bars.
Shear Resistance
It helps to give your drill bit something to dig into, making it less likely to slip or spin out of control. This added resistance also helps to keep the drill bit from becoming too hot, which could damage it or cause it to break.
Centering Ability
A Kelly bar has a tapered shape that allows it to quickly find the center of a hole, even if its location is not perfectly visible. This centering ability is especially helpful when drilling near walls or other objects that could interfere with your drilling path.
Pilot Hole
When used in conjunction with a pilot hole guide, a Kelly bar can help you create an accurate pilot hole quickly and easily. This pilot hole will ensure that your main drilling bit hits its target accurately, preventing damage to your foundation or surrounding structures.
How are telescopic kelly bars used in foundation drilling?
Telescopic Kelly bars are an essential part of the equipment used by drillers to construct deep foundation drilled shafts. The basic Kelly bar consists of several connected steel tubes, with the innermost tube attached to the drilling rig. As the Kelly bar lowers into the drilled shaft, the tubes slide over each other, extending the Kelly bar to its entire length.
This gives the driller greater control over the depth and direction of the drill bit, allowing for more accurate drilling. In addition, telescopic Kelly bars rotate the drill bit, providing even greater control over the drilling process. As a result, telescopic Kelly bars are essential for any driller looking to create deep foundation drilled shafts.
Final Words
The use of a telescopic Kelly bar is vital when drilling a foundation. It allows the drill operator to maintain control of the drill bit while in the hole, which minimizes vibration and gives a more accurate hole. They come in different sizes, depending on the size of the drill bit. They provide a more extended reach and stability than traditional Kelly bars, making them perfect for boring large-diameter holes in difficult-to-reach places.
