H-Pile set in drilled shaft (not driven)

[kasperl]

I'm looking for some guidance or information on the design and installation of steel H-piles set (not driven, but placed) in a drilled shaft that is then filled with concrete.

Any literature or specifications out there? Any experiences?

Thanks!

 

[Zambo]

I would call this a "plunge column" and you should be able to find info by using google.

Of course accuracy of setting is the crucial point and this will be helped if there is a bored pile casing at the upper level.

But some more info would help. Is this a basement construction? Is there a length of "empty bore" after completion of the bored pile and H-Section?

 

[dcarr82775]

What is the purpose of the pile?

 

[PEinc]

Why wouldn't the design be similar to that of a drilled shaft design?

http://www.PeirceEngineering.com

 

[mudman54]

H-pile set in concrete is very common in the New York City building code; it is known as the core steel reinforcement within a caisson. Typically, a casing is used and the core beam set and then tremie concreted.
Also, this type was used in Rhode Island for soldier piles with pre-cast concrete lagging along the Amtrak corridor. My understanding is that the drilled shafts were augered with a special rig that injects the concrete on the way up; then the H-pile is pushed into place while the concrete is fresh.

 

[PEinc]

Codes may require a minimum length for bearing piles. If bedrock is too shallow so that driven piles cannot reach the minimum length, a drilled rock socket may be required in order to achieve the minimum pile length. After the rock socket is drilled, the pile is set and the entire hole is backfilled with concrete. The design could be done by several methods. The pile could be designed as a caisson (drilled shaft), a micropile, a friction pile (bonded to the sides of the rock socket), an end bearing pile, or a combination friction/end bearing pile. Since the pile is not being driven, the allowable compressive stress in the pile should be higher than for a driven pile. Obviously, an auger would not work well if you need a rock socket. If there is no rock, there isn't any reason to auger the hole unless someone is worried about noise or vibrations.

http://www.PeirceEngineering.com