There are many MSE walls in service that have negative batter. The situation probably arose due to the difficulty of working in the confined spaces between the piles and the wall face. Depending on the fill used, the contractor may have found it difficult to get adequate compaction in these...
Problem with the soil nail launcher will be the depth of nail. For a 20m wall you'd need at least a 12m nail and the launcher only really goes to about 6m. So your looking at drilled nails or tie backs.
There is no reason to shotcrete the facing unless you have corrosion issues on the facing...
For many typical retaining walls, you'd ignore passive (unless its on the shear key) and even then you need to be careful because the retaining wall may not be able to tolerate the movement necessary to generate full passive resistance.
KaBone,
This shouldn't be a big deal unless you are dealing with very poor native soils. Put it out to bid on a design/build basis and save your fees to develop a performance spec and evaluate the alternates that come in. Make sure the contractors have the appropriate levels of E&O, and...
Actually the barrier isn't such a big deal if it's designed correctly. There are a few things that matter a lot. If the barrier is placed on top of the wall facing before the anchor slab is cast then it will rotate about the support point at the top of the facing. On the other hand if the...
C'mon guys - back to basics:
It doesn't matter in which face the wall is reinforced, that could not explain a lean in the wall, maybe cracking, but not a lean. The wall is rotating, apparently about the toe, so it is a global failure rather than (or additionally to)a structural one. My first...
MSE walls are often used in river wall applications - BUT: You need to carefully evaluate the potential for scour and provide appropriate scour protection if this is appropriate. In addition you need to assess how the qualities of the in-situ soils will change when wet.
Im hoping that the...
We've done a few of them using MSE walls with precast concrete panel facings. These systems are usually built with vertical facings (highway retaining walls and bridge abutments).
See:
www.earthteccorp.com
www.recousa.com
www.tricon.com
You will want to use high quality (i.e. frictional...
I agree with miecz, when your talking roads your into AASHTO design. AASHTO specifies 250 psf. To think that the only vehicle to ever traffic over the wall would be an empty logging truck is a bit aggressive - what about when the fire truck arrives?
Woven geotextiles usually have an order of magnitude or so less strength than geogrids (per unit width) but have small aperatures, and are thereofre more suitable for separation applications. If you are going over peat, you may need to use both, a geotextile to separate the road base from the...
snsl23,
Glad to hear its worked out, more or less okay. But the point is that you still have, in effect, granted a permanent easement onto your property without getting compensated for it. And you have no idea what the extent of the encroachment onto your property actually is.
You need to...
It would be almost criminal to ignore the load for overall stability considerations. Your wall is a very small part of an overall embankment condition and the Cooper E80 loading needs to be part of the analysis of that overall condition. I agree with others that for internal stress (sigma v)...
Why don't you excavate out the existing fill and build a MSE wall 12" behind the existing wall?
Use wire mesh facings and wrapped geogrids or geoynthetic sheets. While some codes require 8' minimum geogrid lengths, you can get it to work with 6' lengths. It's pretty easy to design and will...
