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Underground gas-pipe protection

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Fellow engineers,

I'm designing an underground pipe for Natural Gas (12" - 6" diameter) 800m 

My client asks me to design a solution to protect the pipe for the case of 
loading a crane-leg above the pipe.

He thinks that it could be a 500 t-m crane there.

The maximum the crane could apply in one leg is 160 ton and they use a 
3.8X2.4m dispersal plate (17.6 t/m²).

The pipe depth is varying between 1.5 to 2.7 m.

The geotech engineer doesn't collaborate so much; it's a sandy-clay soil (I 
 hope I'll get some more information about the soil bearing capacity and 
sedimentation properties.)

Additionally the client asks to design them without steel reinforcement, in 
 order to avoid problems with the cathodic protection.

So I'm looking for a simple way to check the impact of the crane loads on 
the pipe, and a way to design a plastic reinforced concrete pad to bear 
this load.

I would be glad to get comments and recommendations.


David Cohen

Engineering Manager




-----Original Message-----
From: seaint-seaosc(--nospam--at) [mailto:seaint-seaosc(--nospam--at)] On 
Behalf Of h.d.richardson Sent: Saturday, October 06, 2012 8:46 AM
To: seaint-seaosc(--nospam--at)
Subject: [SEAINT-SEAOSC] 30 Storey Building Built in 15 Days

Fellow engineers,

        It looks like the link to the above story got edited out in the

posting.  It was in my sent file but not in the posting I received from the


        The link below should catch it.  Sorry.



----- Original Message -----

From: h.d.richardson

To: Daryl Richardson

Truncated 1866 characters in the previous message to save energy.

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