For heavy tamping, there is no accurate correlation between the tamping energy and shear strength, as I have known. there is some estimation of relative improvement. {x {H$ f
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coarse grained soils 300-400% aGK@)&h$
silty sands 100-400% ?:igumeYX
building rubble 200%-400% &R O7{,`
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the upper bound test value (SPT) for landfill is 20-40 blow/300mm ' # D8*OP^
different original relative density , overburden pressure, will cause different qc. oa`#RC8N
another important point is the treatment depth related to the tamping energy. Y: psZ
generally, 6m spacing is used for site tamping. pOA !#Aj)
low-energy, high energy can be alternate for 4-5 passes and every pass is about 4-6 blows. dZ]Rqr
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it is better of some experienced experts can provide some practical information.
