Assume 2V:1H dispersion for settlement of pile groups.
Fig.5.5 Settlement of pile groups
CODAL PROVISION
SAFE LOAD ON PILES/PILE GROUPS ( Ref. IS: 2911 Part IV 1979 )
Single pile:
1.
Safe load = Least of the following loads obtained from routine tests on piles :
2/3 of the final load at which total settlement is 12mm.
50% of the final load at which settlement is 10% of the pile dia.( for uniform dia. piles) and 7.5% of bulb dia. (for Underreamed piles)
2/3 of the final load at which net settlement is 6mm.
Consider pile as column and find the total compressive load depending on the grade of concrete and dimensions. Eg. Consider a 300mm dia pile made of M20 concrete. .
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