Question

settlement calculation

confused as how the settlement per soil layer was obtained in mm, not getting the unit conversion right. For example, when I apply for formula s for first layer I obtain s=97.6 but the answer is 9.76

mv= 0.8 m^2/MN

ness Terzaghi's method S- depth below L'/z foundation 9.8 61 0.24 5 6.6 4.2 2 41 0.16 0.101 1.67 0.67 2 26 18 0.4 5 2.9 2 0.29 0.22 0.069 0.71 0.56 1.9 12 0.045 25.4 It is necessary to apply correction factors to take into account of the geological history of the clay (normally consolidated or over consolidated) . correction for clay type = 0.8 DİLBW = 0.16 -o. ーラcorrection for depth = 0.96 19,5 min settlement = 0.3 x 0.96 x 25.4 Stress distribution-Fadum's chartsh In many methods for clays it is necessary to determine the distribution of stress Fadum s charts can be used for rectangular areas . Distribution of stress is also used to determine the zone of influence (do,'

Answer 1

Ok so you are confused with unit conversion.

1000kpa=1Mn/m2

It is given in the question about distribution of stress<= 0.1 * vertical stress

Hence;

You need to take the q_n =0.1*vertical effective stress

Hence q_n =6.1 kpa in first reading.

Thus for the first reading

S=4*0.24*0.0061*0.8*2*1000=9.8 mm