Retaining Wall/Contiguous Pile Wall+Liner Wall Detail Question?

[gmannix1000]

Hi All,

Have a situation where I have a basement foundation wall meeting a contiguous pile +liner wall (due to site conditions/restraints etc.) The retaining wall and the capping beam take high laods as the ground floor slab is a thick transfer slab (850mm deep).

I've designed the retaining wall portion for these loads and no problem. The liner wall just retains hydrostatic pressure (contiguous piles retain the soil) and is supported by the basement slab which is connected by dowels into the contiguous piles for a purely shear connection. It doesn't take any axial load and stops short at the underside of the ground floor slab.

The thing is if I connect the liner wall and the retaining wall, some load in the retaining wall will shed into the liner wall, which I don't want, as the basement slab will need to support it and transfer it through the dowels into the contiguous piles then. Ideally would like the liner wall and retaining wall to be 'connected' but not 'load-sharing', if you know what I mean.

Has anybody encountered a situation like this before or know what would the best way to deal with this is? Any option will need to have waterproofing provided also.

See attached also for plan and section if it helps clarify!

Any advice is greatly appreciated!

 

[PEinc]

I would have an expansion joint at the interface between the two wall types because they will most likely deflect differently. I would also install some type of waterstop in the joint and possibly some drainage board at the joint, behind the concrete facing. The drainage board would need an outlet to a collector pipe.

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