DnV RP-E305 Soil data
DnV RP-E305 Soil data
(OP)
As per DNV-PR-E305, the soil is divided to "Sand" and "Clay", and for sand, friction factor of 0.7 is advised.
So, what about Silt, or even more mixed conditions like "Silty Sand"?
AGA suggests for decreasing the friction angle with 5 degree if there is "find sand" or silt in the soil exceeding 5%.
DNV-RP-F109 is also suggesting friction factor of 0.6 for sands.
Actually I am looking for a proof to not using 0.7 for "silty Sand", while I am using E305. Is there any reference questioning E305 sand model?
So, what about Silt, or even more mixed conditions like "Silty Sand"?
AGA suggests for decreasing the friction angle with 5 degree if there is "find sand" or silt in the soil exceeding 5%.
DNV-RP-F109 is also suggesting friction factor of 0.6 for sands.
Actually I am looking for a proof to not using 0.7 for "silty Sand", while I am using E305. Is there any reference questioning E305 sand model?





RE: DnV RP-E305 Soil data
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RE: DnV RP-E305 Soil data
Be careful not to 'cherry-pick' values for factors from different Codes as quite often the factors have double uses to make that Code's formulae work correctly.
In short, if you want to use E305 and you have predominantly sand then you have no choice but use 0.7.