PC Pile Repair

[hamidun]

Dear All,

Can someone suggest me what to do with a broken PC Pile that has already been driven into 24 m depth?

The pile is broken at 2.5 m from the surface of soil. And we have to keep the elevation of the Pile at the surface of soil. What would be the best solution for the Pile?

If we connect the pile with the reinforcement bar and then pour concrete into it, is that OK?

Thanks.

 

[SlideRuleEra]

See: "Nondrivable Unforeseen Reinforced Precast Pile Build-Up Detail"

http://www.SlideRuleEra.net

 

[oldestguy]

In addition to Sliderule's post, I'd set a larger diameter pipe down over the re-bars still there (if any), clean off the damaged area and place a concrete of higher cement content. But first add a thick Portland cement "paste" on the lower pile section to help bond.

 

[kieran1]

It the pile in compression / tension / bending?

If the rig is still on site, can you drive an additional pile alongside?

Kieran

 

[hamidun]

SlideRuleEra,

I am sorry, I don't fully understand with the detail you attached. So, based on the detail, we joint the broken pile with epoxy compound and add dowel to the pile? We don't need concrete or any re bar to join the pile?

oldestguy,

Thanks for the help! Actually, the pile is not completely apart, can we just add a pedestal between the broken and driven pile?

kieran1,

The pile is in compression. If we'd want to order additional pile, it will consume a lot of time and we don't want to do that.

 

[SlideRuleEra]

hamidun - To use the detail from the Florida DOT cut off the pile below where it is broken. The cut is level. To do this, realize that there will be excavation needed to make the cut.
Drill and install the rebar as shown.
Construct forms for placement of the repair concrete. In the detail the forms are shown matching the size and shape of the pile, this is acceptable. However, using a pipe as a form, as suggested by oldestguy, is a good way to get the forming done quickly.
Use epoxy at the joint, an place the concrete repair.

kieran1's suggestion for a replacement pile is very good and usually the best solution. Then the excavation/cutting/drilling/forming/repair can be avoided. For a 24 meter long prestressed concrete pile I'm not surprised that replacement is not an acceptable option.

http://www.SlideRuleEra.net

 

[ukbridge]

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