Design of cantilever retaining walls involves stability checks for overturning, sliding
and bearing. First of all a trial section is assumed and calculations are made for the
stability checks. The important parameters involved are unit weight of backfill soil,
soil-concrete friction factor and bearing capacity of soil. The base length and it
components namely toe land heel lengths, and base thickness are highly dependant
upon these factors and vary sharply with stem height and surcharge. To reach a
suitable trial section is sometimes a tedious job. A window based computer program
has been developed for designing such walls. The program performs checks for
stability on trial sections and then designs the suitable section for strength. This
paper presents proportioning charts prepared with the help of this computer program.
The trial section geometry for a given wall height, soil data and strength of concrete
can be read from these charts and final section profile may be decided within a
minimum time. The charts have been prepared for a wide range of values of soil unit
weight, soil bearing capacity, concrete strength and soil-concrete friction factor. The
computer program can be downloaded from www.uet.edu.pk.