Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!
friction angle of road base materials
- Thread starter USER10
- Start date
BridgeSmith
Structural
Usually, road base material is well-graded crushed stone. 40 degrees is probably a nominal phi angle for that type of material. We typically use 34 degrees as a conservative design value.
For a Type 1 road base, as defined in the UK, (similar to HRs, well graded crushed) I would be comfortable giving a phi of 38 degrees. Thats assuming you have all the documentation to confirm its been placed, compacted to a good spec. But if you had all the documentation you probably would have a shear box test result....
dense-graded aggregate would be easily 44 degrees. Open-graded aggregate at least as good.
Regarding the dense-graded aggregate, the FHWA did do some checking on this for their GRS-IBS bridge system design.
f-d
ípapß gordo ainÆt no madre flaca!
Regarding the dense-graded aggregate, the FHWA did do some checking on this for their GRS-IBS bridge system design.
f-d
ípapß gordo ainÆt no madre flaca!
- Status
Similar threads
- Locked
- Question
- Locked
- Question
- Locked
- Question
- Locked
- Question