PILE DESIGN INTRODUCTION
Nos. of piles needed will depend upon the total vertical load from column / pile capacity Pile group of three,four ,five ,six or more can be adopted based on nos of piles required. Any moment acting from column is also accounted (as it will effect the exterior piles most) by addtional +ve reaction on one side and -ve reaction on other side piles due to moment Minimum c/c spacing between piles shall be: 2*D - - - for piles resting on rock 2.5*D - - - for piles deriving their strength predominantly from end bearing( predominantly sandy strata) 3*D - - - for piles deriving their strength predominantly from skin friction( predominantly clayey strata) (d= Pile shaft diameter) Pile cap can be designed by bending theory .Draw a line at mid depth of pile cap .The column load is taken to be dispersed at 45 degrees into pile cap upto its mid depth acting downwards.The reaction from piles shall also b...