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Re: Drilled Pier/pile-Support is pinned or fixed

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Why not just design a pin into the column / pile interface to control the forces the pile sees?


On 8/29/06, Ashraf, Mohammed (Qatar) <mohammed.ashraf(--nospam--at)> wrote:

Hello All,

I am designing a pile/drilled pier foundation for a building. I want to reduce the support forces so that I can reduce the no. of piles/pier. The columns are almost 20m high. I would like to know whether I can take base as pinned in analysis if I am using singe piles/piers for each column. The pile/drilled piers are around 6 to 10 m deep. The piles/piers here are designed based on skin friction with a pile socket length in rock of 3 to 6m. The rock is of poor quality with RQD (Rock Quality Designation) 0% to 50%. These are from Geotechnical report. I would like to mention that the soil up to 3 to 5m from Pile/Pier head is mainly of hydraulic fill material. N value of top soil varies from 35 to 4. The site is in a reclamation area.

Thanks in advance,



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