Levee Stability - Riverside or Landside Excavation
Levee Stability - Riverside or Landside Excavation
(OP)
Which would produce the least favorable conditions for slope stability and/or seepage
(see attached); assuming all reasonable loading considerations with the exception
of earthquakes and all other things considered equal?
- a riverside excavation OR a landside excavation near a levee toe
(see attached); assuming all reasonable loading considerations with the exception
of earthquakes and all other things considered equal?
- a riverside excavation OR a landside excavation near a levee toe
RE: Levee Stability - Riverside or Landside Excavation
the stability is related to the slope of the embankment and phreatic surfaces. you have not indicated what is happening with interior drainage but assuming it does not impact the land side of the embankment, than rapid drawdown would probably be the worst case on the river side.
Depending on the details, excavation 50 feet away is probably not a big deal. excavation on the river side is fairly commonly done as borrow for construction and to increase the channel capacity
RE: Levee Stability - Riverside or Landside Excavation
Slope stability affects are likely to be fairly limited.
Underseepage affects may be significant. How significant will depend on the specifics. For example, are there any penetrations of the clay between the levee and the river? Does the ground elevation change between the levee and the river? If the excavation is on the landside, will it be full of water during a flood event? What happens to the ground elevation as you get further from the levee? Is the sketch to scale?
Also, it appears that the ground surface is lower on the riverside of the levee. If this is the case it will affect which side is more critical.
If this is a homework problem, then say so and give us your opinion as to which will be more critical and then we can prod you along a little. If it isn't a homework problem, then answer the questions above.
Mike Lambert
RE: Levee Stability - Riverside or Landside Excavation
I'm just curious as to which side of a levee would be more favorable (in terms of stability/seepage concerns) for an excavation;
say for a large pit or quarry which is desired to be near a levee....water filled and otherwise.
RE: Levee Stability - Riverside or Landside Excavation
RE: Levee Stability - Riverside or Landside Excavation