Soil Mechanics - Exam 1 with Complete Solutions

Soil Mechanics - Exam 1 with Complete
Solutions

Continuous flight boring Correct Ans-destructive method of sub surface exploration

-solid stem (have to keep removing it from hole, time consuming)

-hollow stem (auger acts as casing to equalize pressure)

-hand auger (cheap, limited depth)

-water borings (pressurized water down drill shaft)




What are three methods of retrieving a soil sample Correct Ans-shelby tube

split spoon

block




Sizes for coarse and fine grain? Correct Ans-coarse >.075mm

fine <.075mm




size for coarse and fine gravel Correct Ans-coarse = 19-75mm

fine=4.75-19mm




Non-clay physical characteristics Correct Ans-particle size, particle distribution, particle
shape, surface texture

, Is surface force more important for coarse grain or fine grain material? Correct Ans-fine




what is a typical specific gravity? Correct Ans-2.6-2.8




1m^3=?L Correct Ans-1000L




Unit Weight= Correct Ans-Unit Weight=W/V




Dry Unit Weight= Correct Ans-Dry Unit Weight=W(solids)/V(total)




Water Unit Weight= Correct Ans-Water Unit Weight=9.81=W(water)/V(water)




Saturated Unit Weight= Correct Ans-W(solids)+W(water)/V(total)




where V(water)=V(voids)




Gravemetric Water Content= Correct Ans-Water Content=W(water)/W(solids)




Volumetric Water Content= Correct Ans-Volumetric Water Content=V(water)/V(total)




Typical Gs Correct Ans-2.7