15m of 45degree Precast concrete wall on rock slope
15m of 45degree Precast concrete wall on rock slope
(OP)
Hi,
I would like to seek advice or guideline on how to design a 15m wall (Precast concrete wall) at 45 degree angle. The rock surface is experiencing erosion problem, thus the wall is proposed as a surface protection method.
Appreciate if the members can share their experience on this matter.
TQ
I would like to seek advice or guideline on how to design a 15m wall (Precast concrete wall) at 45 degree angle. The rock surface is experiencing erosion problem, thus the wall is proposed as a surface protection method.
Appreciate if the members can share their experience on this matter.
TQ





RE: 15m of 45degree Precast concrete wall on rock slope
RE: 15m of 45degree Precast concrete wall on rock slope
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Another would be shotcrete, more expensive and not so visually pleasing. As far as precast panels are concerned, there would be no way of compacting the backfill, as they would be at an angle.
RE: 15m of 45degree Precast concrete wall on rock slope
After seeing the nuerous side hill slides in this mid-west area, I doubt that any soil type cover will stay on a rock surface in very wet weather.
I'd look at some form of paving using segmented blocks, rather than a solid inclinded concrete "wall". Of course it has to be anchored occasionaly since that whole thing may slide down also.
This is similar to what highway designers run into with the slopes of abutment area at highway overpasses. However, their slopes ar more like 2:1 or 1.5 : 1.
In any case look at what they do in your area.
RE: 15m of 45degree Precast concrete wall on rock slope
I intent to use the precast concrete block with soil infill as the surface cover. My problem when doing the design is that, I am not sure what forces to be considered when calculating the safety factor, Sliding & Overturning.
There are:
W = mg acting downwards.
mg Sin 45 acting parallel to the surface,movement direction.
mg Cos 45 acting perpendicular to the surface, into the slope.
Then there is this reacting Normal Force with value mg Cos 45 but with direction perpendicular outwards from the slope. Then Friction. or internal friction?
Hope you can shade some light here. TQ.
RE: 15m of 45degree Precast concrete wall on rock slope
RE: 15m of 45degree Precast concrete wall on rock slope
I'd neglect any friction benefit and depend only on spaced anchors into the rock.
Is there any chance you can extoll the benefit of an exposed rock surface for appearance sake and forget the wall? Use the money elsewhere for some better benefit?