I'm confused. What does Ch mean?
You can test a 90-degree sample, and you will probably find that it is substantially higher than Cv of a normal sample, but how do you use that? For typical consolidation analyses, we pretend that perfect drainage (zero excess PWP boundary condition) is provided by more pervious layers above and/or below the soft clay. What is the analogous boundary condition for horizontal consolidation?
Or, is the OP referring to vertical consolidation with radial drainage to sand drains or wick drains?