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Looking for help with the stress analysis method of "400mm gravel-covered" pipes?

2018-03-15View Original

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Asking for help from experts: Analysis conditions: 1. The temperature of the flare exhaust gas pipeline is 260°C and the pressure is not high. ; 2. The length of the exhaust gas pipeline is 80 meters. 3. The exhaust gas pipeline is supported on cement piers and is loosely covered with 400mm thick stones. The diameter of the stone particles is 2-3 cm. ; Please provide analysis methods or calculation examples, thank you all!
Reply #22018-03-15
Treat the soil as a uniform load on the pipe, and then consider the appropriate friction coefficient.
Reply #32018-03-16
If there is support underneath the pipe, this should be correct. If there is no support and it is placed directly on the gravel, do I think we should use underground pipe analysis to change the soil properties?
Reply #42018-03-21
Ground torches are supported.
Reply #52018-04-18
Thank you for your advice. I haven’t been on the forum recently, but I just saw your message! There is indeed support at the bottom of the pipeline, which is supported on civil foundations. There is a T-support similar to a saddle support below the pipeline. Thank you! That is to apply "Uniform Loads" to apply a uniform load downward on the Y axis? Yeah? Is the "friction" you are talking about the friction between the support and the T bracket? How to consider the friction between the "stone" and the "pipe wall"? ?
Reply #62018-04-18
There are supports underneath the pipe, as you can see in the picture: The lower part of the pipe is partially empty and not filled with stones!

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