k values
k values
(OP)
What lateral earth pressure coefficient(k) is typically used for good drainage backfill? What can be used for 1" gravel?
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RE: k values
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RE: k values
RE: k values
The appropriate earth pressure coefficient will depend a lot on the material. The angle of internal friction, φ, of the material will depend on both the density and angularity of the material. Smooth, well rounded particles will have lower φ than a crushed rock material. Values of φ for rounded materials will range from about 32° to 37° while values for a very angular crushed rock material can reach 40° - or more.
You can check with some of the other engineers in your area to see what is commonly assumed; but don't forget to discuss this with the project geotechnical engineer...
Please see FAQ731-376 by VPL for tips on how to make the best use of Eng-Tips Fora.
RE: k values
Rgds,
Rob.