Can you give any reference for the flexible pipe coupling for 200mm of
the differential settlement ?
Thanks
Bhavin
On 9/24/08, Paul Blomberg <paul.blomberg@gmail.com> wrote:
>
> 150 mm (6") is a lot of settlement. Talk to the Geotechnical Engineer on
> methods to lower the settlement. Alternatives include piles and different
> soil stabilization techniques. You might also be able to place overburden
> on the site to allow the soil column to consolidate, then remove the
> overburden and place the tank. This technique might take a long time to be
> effective in clayey soils.
>
> Again, the Geotechnical Engineer is the person to talk with.
>
> I have used a flex connection on the tank pipes when settlement was expected
> over the long haul. That pipe coupling accommodated the differential
> movement (200mm) without overstressing the pipe. I don't know if they are
> available for a 30" diameter pipe.
>
> Paul.
> Phoenix, AZ. USA
>
>
> On Wed, Sep 24, 2008 at 10:18 AM, Bhavin Shah <bhavin.design@gmail.com>
> wrote:
> > This is regarding tank (15.0m diameter & 15.0m height) supported on
> > ring wall (inside of the ring wall has been filled up with the
> > compacted sand.) resting on clayey soil.
> >
> > For design of the foundation total settlement at the tank has been
> > considered as 150mm (immediate settlement =15mm + consolidation
> > settlement = 135mm) as per the soil report. However, as informed by
> > Piping engineer, for pipes (30" dia.)connected to the tank,
> > permissible differential settlement is only 50mm because of the
> > congested plant and as per the flexibility analysis.
> >
> > Kindly advice what measures may be taken so that tank foundation can
> > be designed for 150mm of the settlement.
> >
> > Thanks
> > Bhavin
> >
>
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