Concrete Pavement on Slope

[asixth]

Hi guys,

I have a concrete pavement on a 1:3 grade and I'm a little concerned about the slab sliding, similiar to a retaining wall sliding due to active earth pressure.

Has anyone designed a concrete pavement on such a steep slope and did they use any general design principles such as providing a shear key or other form of mechanical resistance.

Also, is this sliding the only failure mechanism that can be developed or should I be looking at a global failure surface as well.

The slab is a residential driveway but I have been requested to make allowances for heavy traffic.

If anyone can point me towards any reference material than that would be greatly appreciated.

 

[MiketheEngineer]

That is a heck of a slope for a driveway - some people would have trouble walking up it. Any way to re-grade??

 

[kslee1000]

Check sliding stability, you may need keys or positive tie-offs (soil nailing?). You can find design examples from foundation text books, or visit USCOE (corp of engineers) website.

 

[civilperson]

An 18.4% slope is stable as to sliding concrete on soil/granular base, however, check the stability of the slope with respect to the soil. Use tine texture parallel to topo line for tire friction when raining.

 

[btrueblood]

A 1:3 slope is 18.4 degrees, or 33%.

 

[msucog]

try

http://www.cement.org

(lots of info here but more likely to help you find a link to a website with what you need)
and

http://www.wbdg.org/ccb/browse_cat.php?o=29&c=4

(down around UFC 3-250).

i've used a detail before for thickened edge/construction joint that worked well but i can't recall the exact manual it came out of. basically, it was a thickened edge that acted as a key.

 

[asixth]

thanks guys,

The slope is 1:4, I wanted to dramatize this in the hope of recieving a wider response.

I've done some statical equilibrium numbers to satisfy myself this pavement won't slide because of the friction at the concrete-soil interface. I haven't had much experience with pavement design so I wanted to know what are the commonly used techniques when constructing pavements on steep grades.

I'll research into soil nailing, slope stability, re-grading and texturing the wearing surface.

Thanks all for your replies.