Question

a normally consolidated clay settled 10mm when effective stress was increased from 100 kn/m2 to 200 kn/m2. if the effective stress is further increased from 200 kn/m 2 to 400 kn/m2 then the further settlement will be

Answer 1

We know that, Change in height ΔH is directly proportional to Log base 10 of (Increase in pressure/ initial pressure)

Given that, height of settlement = 10mm, when pressure increased from 100 to 200 kn/m^2

Let height of new settlement be 'x', when pressure increased from 200 to 400 kn/m^2

So, lets equate the ratio of heights and pressures.

10 / x = Log base 10 ( 200/100) / Log base 10 (400/200)

x = 10 / 1

x = 10 mm = 1 cm

Answer 2

Answer:

We know that, Change in height ΔH is directly proportional to Log base 10 of (Increase in pressure/ initial pressure)

Given that, height of settlement = 10mm, when pressure increased from 100 to 200 kn/m^2

Let height of new settlement be 'x', when pressure increased from 200 to 400 kn/m^2

So, lets equate the ratio of heights and pressures.

10 / x = Log base 10 ( 200/100) / Log base 10 (400/200)

x = 10 / 1

x = 10 mm = 1 cm