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Retofitting/repairing Micro Piles - How to?

 
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mtamil
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Joined: 07 Apr 2011
Posts: 187

PostPosted: Sat Nov 07, 2015 7:07 pm    Post subject: Retofitting/repairing Micro Piles - How to? Reply with quote

Dear Sefians,

Need your help, to solve this issue.

I have a facility having thousands of micro-piles, typically 300mm dia 1.5-2m deep. The soil condition is varying, in some places its a C-phi soil and other places gravelly sand. At few places disintegrated rock is encountered.

I find that about 5000 (five thousand) piles are defective and need rectification. The defects are 1. Missing reinforcement at top of 500 mm of the pile, 2. Voids in the pile (discontinuous concrete)

The design looks alright but construction was a problem. These piles are singular and free headed.

As of now, I am replacing these defective piles with spread foundation (built over/along  the existing defective piles).

Is there any other method(s) of rectification that you can suggest?

Thanks in advance,
Regards
Tamil
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raghuveerks
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Joined: 19 Oct 2009
Posts: 67

PostPosted: Sun Nov 08, 2015 5:54 pm    Post subject: Reply with quote

Hi Mtamil,

Can we know what is the status of the building, purpose & the capacity of the pile(max)?

Thanks,
Raghuveer
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mtamil
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Joined: 07 Apr 2011
Posts: 187

PostPosted: Mon Nov 16, 2015 6:45 am    Post subject: Reply with quote

Hi Raghuveer,

Thanks for the interest.

Few foundations failed.
Loads are small. Vertical +/- 1000kg. Lateral 900kg.

Foundations failed under wind loads. Wind speed is about 12.5m/sec at the tome of failure. The structure is designed for 47m/sec.

Hope this clarifies.

Regards
Tamil
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