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                              a) PILE GROUP CONSIST OF  b) PILE GROUP CONSIST OF  c) SYMMETRICALLY ARRANGED
                               ONLY VERTICAL PILES   BOTH VERTICAL AND RAKING  VERTICAL AND RAKING PILES
                                                            PILES


                           Q = Vertically applied load
                           H = Horizontally applied
                           load
                                            Figure 2-2 Basic formation of pile groups





                      LOAD DISTRIBUTION



                      To a great extent the design and calculation (load analysis) of pile foundations is
                      carried out using computer software. For some special cases, calculations can
                      be carried out using the following methods…...For a simple understanding of the
                      method, let us assume that the following conditions are satisfied:

                      The pile is rigid

                      The pile is pinned at the top and at the bottom

                      Each pile receives the load only vertically (i.e. axially applied );

                      The force P acting on the pile is proportional to the displacement U due
                      to compression

                               ∴ P = k.U         ……………………………………………3.2

                      Since P = E.A
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