Compression of soils for resistance to sliding
Compression of soils for resistance to sliding
(OP)
I have a few general geotechnical questions:
In designing a retaining wall, there often needs to be a key to resist sliding. The soil in front of the key has to go into compression. Is there a set distance in front of the key (the area in compression) where the compression occurs? If so, how do you calculate it for walls on a slope where there is a finite horizontal distance from the base of the key to the slope? Also, what role does submergence play? Any information would be quite helpful. Thanks.
In designing a retaining wall, there often needs to be a key to resist sliding. The soil in front of the key has to go into compression. Is there a set distance in front of the key (the area in compression) where the compression occurs? If so, how do you calculate it for walls on a slope where there is a finite horizontal distance from the base of the key to the slope? Also, what role does submergence play? Any information would be quite helpful. Thanks.
RE: Compression of soils for resistance to sliding
Hope this helps.
f-d
¡papá gordo ain’t no madre flaca!
RE: Compression of soils for resistance to sliding
RE: Compression of soils for resistance to sliding
I appreciate the info!
RE: Compression of soils for resistance to sliding
How tall of a wall are you looking at? I will suggest you consult a local geotech. Anyway, you seem to have a base sliding problem which is common with retaining walls. You might want to consult NAVFAC DM 7.1, 7.2 for determining passive pressure on slopes. You might also want to try increasing the width (B) of the wall footing. And be careful in just multing the vertical load (dead load only), by tan(phi). That tan(phi) is an estimate of the coefficient of friction. Similar to basic physics- friction force is equal to normal force(reaction force) x coefficient of friction. However, it also depends of the type of soil. NAVFAC DM also have a table showing the coefficient between different soils and concrete. A shear key is also a good idea, maybe as a redundancy if you are not feeling to comfortable. (By the way, you can download the NAVFAC online). But again I advise you to consuld a geotechnical engineer