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. jQ>~
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coarse grained soils 300-400% -|F(qf
silty sands 100-400% @8\7H'K"\
building rubble 200%-400% fcaUj9qN
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the upper bound test value (SPT) for landfill is 20-40 blow/300mm *CtWDUxSdW
different original relative density , overburden pressure, will cause different qc. 'M20v-[
another important point is the treatment depth related to the tamping energy. `Vph=`0
generally, 6m spacing is used for site tamping. Tvp ~~Dk
low-energy, high energy can be alternate for 4-5 passes and every pass is about 4-6 blows. CMu/n]?c
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it is better of some experienced experts can provide some practical information.
