Retaining wall design
Retaining wall design
(OP)
I'm currently trying to design a retaining wall/retaining wall system the total height of the drop I'm looking at is 15'. The back side is to be backfilled and the front side will be mostly exposed. The front side of the retaining wall will be exposed to a pond, though normally just above water height. the soil is sand, don't ask me the properties has this is just a preliminary design. the idea is either 1 tall retaining wall or 2 retaining walls with the lower one being 10' and the upper one being 5' (exposed). The owner demanding the lowest possible cost. With that being said heavy equipment cannot make it to the site, and concrete if trucked in will have to be wheel barreled to the site since low cover prevents a boom pump from being used. What is everyone’s suggestion on material, and approximate cost the wall will be about, 25' long. I was thinking about using CMU's with a poured footing using 1 wall.





RE: Retaining wall design
Why can't equipment be mobilized to the site?
Building the wall by hand (manual labor) will not likely be cost-competitive, either...
More information would help us help you.
Jeff
Jeffrey T. Donville, PE
TTL Associates, Inc.
www.ttlassoc.com
The views or opinions expressed by me are my own and do not necessarily reflect the views or opinions of my employer.
RE: Retaining wall design
RE: Retaining wall design
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Note that these plans limit height to just over 7.5 feet (2.4 meters), so two walls of this height would be required. Also they would need significant horizontal separation since the posts cannot be installed very deep.
With a pond at the site and sandy soil, it may be possible to install the posts by jetting with a centrifugal pump (I have done this, personally - years ago).
I'm not suggesting that you follow these plans, perhaps going over them with the Owner may give him some idea of just how much work (manual labor) this would be.
www.SlideRuleEra.net
RE: Retaining wall design
RE: Retaining wall design
Many a Cottager has memories of the summer that the Family built the retaining wall.
RE: Retaining wall design
1) if I want to terrace this how far apart do the walls have to be
2) is there anyway to reduce the size of the base, it looks like for a 15' wall i need a 9' width, and a 10' high wall will require a 7.5' base
RE: Retaining wall design
RE: Retaining wall design
RE: Retaining wall design
RE: Retaining wall design
Cheers
RE: Retaining wall design
RE: Retaining wall design
RE: Retaining wall design
RE: Retaining wall design
Dik
RE: Retaining wall design
RE: Retaining wall design
RE: Retaining wall design
RE: Retaining wall design
All of the technical issues you have with the gabion wall can be readily addressed by contacting Maccaferri directly.
Design assistance and site visits are provided, typically free of charge. The more detailed the information about the site, the more accurate the design. If you have specific site restrictions, they can be addressed.
Your concerns about the frost are also addressed with the gabions. Unlike most other materials used for retaining wall construction, the gabions are naturally flexible, so as the ground moves, so moves the structure.
RE: Retaining wall design
See the other thread on this subject for what works here in cold climate also.
If folks want to do manual work them selves, the crib type thing with RR ties also is in the picture. In that case, terraces are pretty much needed, probably three. Manual excavation also is less than for gabions, being limited to the tie backs.
By the way, creosoted ties, even if old, last very long.