Time rate of consolidation example: average degree of consolidation and settlement.
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- Опубликовано: 6 сен 2024
- Example that involves use of the relationship between the average degree of consolidation and the time factor for calculation of settlement at a given time and the time required for the layer to settle a given amount.
Video #14.
Fantastic. I love it, well explained.
Hello man when do you use this long formula for settlement and when to use the same formula but without cr parameter?
Say, there are four layers below a square footing. Up to the depth of footing the soil is clay.
First layer: clay soil, thickness H1, coefficient of consolidation: Cv1
Second layer: clay soil, thickness H2, coefficient of consolidation: Cv2
Third layer: sandy soil
Fourth layer: clay soil, thickness H4, coefficient of consolidation: Cv4
The fourth layer is followed by impermeable rock.
How would you apply Terzaghi's classical formula , t = Tv/Cv*hd^2 to this problem? (hd = drainage path)
To be more specific, how can we calculate time required for 50%
consolidation of entire soil system? What will be the values of Cv and
hd for the first layer?
A half-closed layer (free-draining top boundary) is 10 m thick with cv = 7.9 m2
/yr. Pore pressure measurements were
made as follows:
Depth/ m 0 2 4 6 8 10
u/ kPa 60 54 41 29 19 15
Obtain a numerical estimate of the excess pore water pressure after 1 year’s consolidation has occurred.
Can you please explain the steps for this if possible. Thanks