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Where
q = Qg / (Lg Bg) kN / m2
Similarly, the group pile settlement is related to
the cone penetration resistance by the formula
qc = average cone penetration resistance within the seat of settlement.
CONSOLIDATION SETTLEMENT
UNDER A PILE GROUP
Sometimes, a pile group may be embedded
above a soft clay layer and transfer sufficient
load to it to cause consolidation settlement. To
estimate the consolidation settlement, the full
design load is assumed to act at a depth of
(2 / 3) L and is then distributed in the ratio of 2:1
(vertical : horizontal). The increase in vertical
stress at a depth z in the soft clay layer.
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