Cantilever sheetpile wall with sloped fill both sides
Cantilever sheetpile wall with sloped fill both sides
(OP)
I am designing a cantilever sheetpile wall with sloped fill on both sides. There is sloped backfill of 20 degrees up away from the wall and in front down away from the wall at 39 degrees. The wall is only "retaining" 7', but the front slope does not seem stable. How can I take this into account in my analysis? How does this affect the design? The passive pressure?
thanks
thanks





RE: Cantilever sheetpile wall with sloped fill both sides
Upward sloping fill behind the wall must be accounted for with a Ka formula including this angle.
The sloping fill in front of the wall cannot be utilized as the slope has no resistance. The deeper your sheetpile gets the less significant this slope issue becomes.
HTH
VOD
RE: Cantilever sheetpile wall with sloped fill both sides
Sometimes, in a case such as yours, I will ignore much of the upper portion of the sloped dirt in front of the wall and then design the wall for a greater height. This essentially assumes that the wall is higher and the slope in front is flatter.
RE: Cantilever sheetpile wall with sloped fill both sides
Having said that, and theory asside, using a friction angle of 39 degrees will yield weaker springs at the pile's dredge line which will force eventually to design for a deeper cut anyway.
Good luck.
RE: Cantilever sheetpile wall with sloped fill both sides
RE: Cantilever sheetpile wall with sloped fill both sides
f-d
¡papá gordo ain’t no madre flaca!
RE: Cantilever sheetpile wall with sloped fill both sides
RE: Cantilever sheetpile wall with sloped fill both sides
Ka = Sin^2 (?+?)/(sin^2? sin(?+?) [1+[(sin(?+?) sin(?-?)/ (sin(?-?) sin (?+?))]^0.5]^2)
Where:
?: face inclination from horizontal = 90 for vertical
?: Surcharge slope angle.
FT = 1/2 Ka *? *h^2
FV = FT sin? and FH = FT cos?
Skyline Steel have a free prosheet design softwear that u could check your calculations.
Good luck.