Module 2 : Theory of Earth Pressure and Bearing Capacity
Lecture 6 : Introduction[ Section 6.2 Displacement Related Earth Pressure]
2.
Proposed method:
In the proposed semi-empirical approach, the assumptions made are:
For translation mode, when full active pressure gets mobilized at all depths. So is assumed to be constant throughout the depth.
For rotation about top (RT) mode, is a linear function of depth z. At the bottom when , the mobilized friction angle will be zero at the top and full value of at the bottom. For < at the bottom and = 0at the top.
For rotation about bottom mode, is also a linear function of depth Z. At top when the mobilized friction angle will be zero at bottom and full value of at the top. For < at the top and = 0 at the bottom.
The mobilized wall friction angle increases with the increase in mobilized friction angle resulting in a constant value of /
full active pressure gets mobilized at all depths. So 
is assumed to be constant throughout the depth. 
is a linear function of depth z. At the bottom when 
, the mobilized friction angle 
will be zero at the top and full value of 
at the bottom. For 
is also a linear function of depth Z. At top when 
the mobilized friction angle 
increases with the increase in mobilized friction angle resulting in a constant value of 
/ 
