Deadman Design for sloped anchor
Deadman Design for sloped anchor
(OP)
This is a two part question:
Part 1 is generic - how would you design the attached deadman.
Part 2 should the passive resistance of a deadman anchor be only the hieght of the pressure diaphragm that is equal to the height of the anchor or should you use the entire height of the pressure diaphragm?
Background:
This is an anchor for an erosion control mat that utilizes tendons.
Thank you in advanced.
Part 1 is generic - how would you design the attached deadman.
Part 2 should the passive resistance of a deadman anchor be only the hieght of the pressure diaphragm that is equal to the height of the anchor or should you use the entire height of the pressure diaphragm?
Background:
This is an anchor for an erosion control mat that utilizes tendons.
Thank you in advanced.
EIT





RE: Deadman Design for sloped anchor
EIT
RE: Deadman Design for sloped anchor
For a deadman anchor, bowels appears to use the resistance of the full passive pressure:
F=0.5*Pp*g*d^2
shouldn't the resistance be:
F=Pp*g*d*h
Where d is the depth to the bottom of the anchor and h is the height of the anchor?
EIT
RE: Deadman Design for sloped anchor
F = 0.5*Pp*g*d^2 = 0.5 x d x (Pp x gamma x d) = the area of the net passive pressure triangular distribution = net passive pressure per LF of deadman width.
www.PeirceEngineering.com
RE: Deadman Design for sloped anchor
I think I may have confused some variables in my questions so I have attached a sketch to clarify.
I agree that there is passive and active however I have not shown the active. Also yes these equations are per linear foot. Can you look at the sketch and see if you think Eqn 1 or Eqn 2 is correct?
Also when you say you have never seen this used for design are you referring to the deadman equations? If so what design equations are typically used? This appears to be the equations given by Bowels who does say that there are some more complex equations given in the USS sheet piling design manual but that they may not be warranted as the precision is not that much better.
EIT
RE: Deadman Design for sloped anchor
www.PeirceEngineering.com
RE: Deadman Design for sloped anchor
Thanks again.
EIT
RE: Deadman Design for sloped anchor
www.PeirceEngineering.com
RE: Deadman Design for sloped anchor
Any thoughts on my original post regarding the deadman being pulled out at an angle toward the surface?
EIT
RE: Deadman Design for sloped anchor
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