Module 6 : Design of Retaining Structures
Lecture 26 : Introduction [ Section 26.3 : Design Requirement for Gravity walls ]
   
  For a safe design, the following requirement must be satisfied.
No Sliding
 

Horizontal forces tend to slide the wall away from the fill. This tendency is resisted by friction at the base.

= Coefficient of friction between the base of the wall and soil (= tan ).

= Sum of the all vertical forces i.e. vertical component of inclined active force.

A minimum factor of safety of 1.5 against sliding is recommended.

No Overturning
 

The wall must be safe against overturning about toe.

   
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