Hello,

I have modeled and analysed a buried pipe having 66m length in one direction. The one end of the pipe is anchored. The force (along the pipe's long. axis) is very high (around 300 Tons).

Total length of buried pipe : 400 m

Pipe Size : 3200 NB x 20 TANK

Temp: 43°C

Ambient : 32°C


Can anyone suggest how to reduce this force axially.

Thanks in advance.

Shiv

my freind,

i think the best manner is changing the pipe route.it is better to attach a drawing that shows the pipe toute.

Dear Admistrator,
I want to know how your software CAESARII deal with the insulation thickness when computing buried pipe model. Because I found that we will get different result with different insulation thickness，and I want to write some papers about this. So I want to get some information from you, if possible, please send the information to my Email and my Email address is bfmyvmqj@163.com. Thanks very much! Looking forward to your reply!
Liag
3.11.09

The diameter of the pipe et. al. determines the amount of soil that gets pushed around and also the sets part of the normal load in the axial friction calculation. So the stiffness and ultimate loads change when diameter (with insulation) changes. You may want to read the Peng article on which the CAESAR II soil modeler was based: Peng Part 2.
I would like to add that CAESAR II Version 5.20 will be adding the soil model defined in the American Lifelines Alliance document on buried pipe.

To reduce axial loads in buried piping u can use sleeves (which is modeled as guide) means you are isolating the pipe and soil, thereby reduced continuous restaint(axial)

thanx

The line buried shall be perpendicular to the line aboveground to reduce large axial forces.

Thank you!