We are planning to build two gabion walls on a slope, the image shows the intended design.
How is the earth pressure calculated when the earth inside the wall remains a slope?
What dimensions of gabions are required, A and B in the image, respectively?
The angle of repose is always measured at 45 degrees from the base, I think you might need to excavate a bit to get it as drawn in your section. Even though the gabions weigh tons, they need a good foundation. Excavate and backfill with a sub-base layer that you compact in stages to prevent settlements or outward tilting, at least for the lower one.
Thank you. Yes, I forgot to draw that into the picture. I'm thinking 20-30cm of macadam. Also, place geotextile at the back of the gabions, as well as a drainage pipe.
The question remains whether A should be 0.5m or 1m?
I've read that to be sure, a 1m x 1m gabion can handle an earth pressure of 1m.
you can reinforce the ground behind the gabion so it doesn't have as much ground pressure, I don't know the name in Swedish but in English it's geogrid. I have placed some where there are complex ground conditions and little space for a slope at 45 degrees. You lay it on the excavation and horizontally into the slope with a height spacing of about 1 m, I believe the price is around 60 kr / m2. so it does cost a bit.
unfortunately, I can't answer which gabion can withstand the ground pressure you have. I can't find anything to calculate gabions with ground pressure and since you can have different amounts of stone and types of stone, the suppliers of the cages don't seem to want to explain.
Is it the same as geogrid?
I have been thinking about it. It would involve a lot of digging to put it in place.
The easiest would be to size the wall correctly. Then I would avoid all the digging and I can also see an advantage in letting the masses stay there as they have for 6 years. I assume the slope, the soil has settled then.
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