the one in level 9 is reasonable. when there is tendency to slip in slope, the retaining wall will be activated. that means there is small displacement occurred on the slip wedge, as will cause active pressure on the wall, but in analysis the friction force and normal resistance on the slip plane should be considered together at this time.ka=(1-sin(phi))/(1+sinphi) ,>
(bt%b
at-rest pressure is larger than active one, for ko=1-sinphi.but when analyzed with at-rest coefficient, the force on the slip plane will not be accounted for. OVUs]uK
generally, active pressure should be utilized to analyze the stability of slope.
