Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

Re: Tank settlement

[Subject Prev][Subject Next][Thread Prev][Thread Next]
Thanks for the reply.

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(--nospam--at)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(--nospam--at)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
> >
>

******* ****** ******* ******** ******* ******* ******* ***
*   Read list FAQ at: http://www.seaint.org/list_FAQ.asp
* 
*   This email was sent to you via Structural Engineers 
*   Association of Southern California (SEAOSC) server. To 
*   subscribe (no fee) or UnSubscribe, please go to:
*
*   http://www.seaint.org/sealist1.asp
*
*   Questions to seaint-ad(--nospam--at)seaint.org. Remember, any email you 
*   send to the list is public domain and may be re-posted 
*   without your permission. Make sure you visit our web 
*   site at: http://www.seaint.org 
******* ****** ****** ****** ******* ****** ****** ********