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d/2 d d/2 1:1 1:1 d
Critical Sec. Critical Sec.
for Moment for Shear
The concrete section and area steel are determined 53
from the max. moment, then check of shear and
punching is performed.
17 August 2021
Negative Skin Friction
Downdrag force occurs when the Original Q
soil surrounding the pile settles Ground
Surface
more than the pile itself. Granular Fill
Occurred in the following Fg L1
conditions: L2
1- Recent fill over very soft soil. Soft Clay
2- Soils undergoing consolidations.
3- Lowering of ground water table Fc
may cause subsidence and
consequently –ve skin friction.
Rock
27
