Page 119 - Water Standards
P. 119
Fi g ureA.0.2 Dia g ramofthesin g le- p laneslidin g
Where:
K′=safet yfactorofstabilit ya g ainstslidin gcalculatedb y
shearfrictionformula;
f ′=frictioncoefficientoftheslidin gp laneforshearfric-
tionslidin g ;
c′= cohesion ofthe slidin g p lane for shear friction
,
slidin g kPa ;
∑W=sumofverticalforces , kN;
G=wei g htofrockmassabovetheslidin gp lane, kN;
∑P=sumofhorizontalforces , kN;
α=di pan g leoftheslidin gp lane,whichisp ositivewhen
theslidin gp laneisinclinedtodownstreamandne g a-
tivewhentheslidin gp laneisinclinedtou p stream;
U=u p liftactin gontheslidin gp lane, kN;
A=calculatedsectionalareaoftheslidin gp lane,m .
2
2 Theformulaforslidin g -friction.Thesafet yfactorofstabilit y
a g ainstslidin gma ybecalculatedwiththeFormula( A.0.2 2 ):
[(
K= f ∑W +G) cos α-∑Psin α-U]
∑W
( +G) sin α+∑Pcos α
( A.0.2 2)
1 1 1
