Segmental Retaining Wall at a Pond, Design Method?
Segmental Retaining Wall at a Pond, Design Method?
(OP)
I am designing segmental retaining walls on a project. One portion of one wall skirts a retention pond. The NCMA design manual throws up a lot of red flags regarding "Submerged SRW Design" in section 8. Other designers feel that if backfilled with free draining granular material the water will flow out as quickly as the water recedes eliminating any additional pressure. Any help would be appreciated. Ken





RE: Segmental Retaining Wall at a Pond, Design Method?
You might have to live with the wall being constructed a short distance away from the pond to allow an impervious membrane to be installed between the wall and the pond. Membrane can be EPDM, Bentafix, or even a layer of impervious clay...
Just some suggestions.
Dik
RE: Segmental Retaining Wall at a Pond, Design Method?
RE: Segmental Retaining Wall at a Pond, Design Method?
RE: Segmental Retaining Wall at a Pond, Design Method?
I have designed several MSE walls in water front cases. Main concern is rapid drawdown as Boonie mentioned. Using 3/4" clean stone as reinforced backfill wraped behind with filter cloth have proved good enough in my experience in channel applications as well.
NCMA has a good resource if you want to consider the hidrostatic pressures. Click on the following link to get it:
http
Quite long link, but dont know how to make it shorter. Hope it works.
Good luck!
JL
RE: Segmental Retaining Wall at a Pond, Design Method?
RE: Segmental Retaining Wall at a Pond, Design Method?
Have you checked the Australian standard AS4678? The main thing to confirm here is the type of segmental material used at this end of the project. Llso, design for effect of static & transient pore water pressures.
Special considerations shall be given to:
- drawdoen effects,tidal lag, residual WT
- pipping & material loss from the structure
- scour or erosion infront of structure
- wave action?
- loss of backfill
-durability of materials