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Re: Tank settlement

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No foundation may design to take 150mm settlement.

- it is better to make flexible joints
1- cut the pipes before the tank as cantilever support to the tank
2- connect the two  pieces of pipes by flexible winding  rubber.
3- fastening the rubber with the pipes by metal rings .

                             Dr- hamida
                                  Syria


----- Original Message ----- From: "Bhavin Shah" <bhavin.design(--nospam--at)gmail.com>
To: <seaint(--nospam--at)seaint.org>
Sent: Wednesday, September 24, 2008 10:18 AM
Subject: Tank settlement


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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