The time factor corresponding to average degree of consolidation of 90%, assuming constant increase in excess pore water pressure with depth at the time of loading is
- A0.848Correct
- B0.197
- C0.286
- DNone of these
Solution
Concept
Tv at U = 90%
Formula
Tv = 1.781 − 0.933 log(100 − U)
Step-by-step solution
1. At U = 90%, Tv = 0.848.
Explanation
Standard value from the Tv–U relation.
Why the other options are wrong
0.197 is for 50%.
Shortcut
T90 = 0.848; T50 = 0.197.
Correct answer: A) 0.848