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Soil investigation,Roorkee by sand replacement method weight excavated soil=761.25gm weight of sand+cylinder=10500 weight of sand+cylinder after pouring 9450g,calculate the insitu unit weight of soil
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Weight of sand filling the=(w1w2)

excavated hole and wne=(10500-9450)= 1050g

Weight of sand filling cone only=(w2w2)=(94509005) =445g

ii) Borrow pit:- γd=γ1+w=171+0.15=14.78kN/m3

e=(Gγwγd1)=0.778

n=e1+e=0.438

s=w.ge=0.15×2.680.778=0.516 or 51.6%

ac=n(1s)=0.438(10.516)=0.211

The degree of saturaton is 51.6% and air content is 0.211

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