Jan 21, 2021 11:53 pm
I was wondering if anyone had any suggestions on how we can add to the height of our concrete poured retaining wall. The wall is currently 600mm high and 18m long. We are needing it to be up 400mm higher in the lowest part so we can level out our block properly for turf. I was unsure as to whether we should get another smaller wall poured behind it closer to our house or whether we can put blocks on top of the pre-existing wall.
Hopefully I am able to get some suggestions.
Re: Adding to concrete retaining wall2
Jan 22, 2021 10:34 am
Here's some tips you might find useful in moving forward with your project
Retaining walls require
1.Council consideration in the way, setbacks, height,etc,etc requiring planning DA and Building BA approvals...check with your Council
2.Footings, structural elements basically you'll need a Structural Engineer along with certification
3.I don't recommend you build a retaining wall on top of what appears to be a curb?
You might want to add a cross section detail
The better the information you put up the better the reply.. plus it helps other
OT the funny thing about Insta, photo/advice sharing, marketing on other sites is you rarely see compliance, costs and technical data together...I'll give that the thumbs down. here 600mm Twinside Post and Rail retaining $80/m DIY
Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs
Re: Adding to concrete retaining wall3
Jan 23, 2021 1:51 am
Hmmm I don't think so.
Either blocking or pouring, youd need to dowel into the wall say every 300mm c/c or so with N16s. I think the issue would be that there wouldn't be enough shear capacity in the wall b/w dowel and wall edge to resist the OVT moments of the fill, so, I don't think extending strictly up could be engineered.
However, we could get creative here.
I think, it could be designed so that a new "wall" is built in front and slightly below the existing with a leg, and zagged over the existing wall. This way; fill, the existing wall and gravity are all working to resist the overturning moments.
Id advise against fill though. It was probably filled the way it is for various reasons.
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