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MSE pullout resistance

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yaroosh

yaroosh

Structural
Joined
May 11, 2015
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Hello Everyone,

I am designing an MSE Wall using FHWA as guidance. In one of their examples (E4-12), to calculate the pullout strength, they are using horizontal surcharge. This surcharge they got it thorough the equivalent height of soil for vehicular loading which is 2 feet. However AASHTO 11.10.6.3.1, mentions that traffic loads are neglected in pullout calculations. I feel confused as I see that the usage of equivalent height of soil is the same thing as using Surcharge Live load. Am I missing something?
example_hjgzdu.png


Thanks!
 
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You should ignore the live load when it acts as additional overburden stress but include its horizontal stress K*q as a driving force.
 
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