ABSTRACT
Suitable valuesfor J.,l may be assumed in the above equation depending on the type of soil. For saturated clay soils J.,l is taken as equal to 0.5 and for freely draining soils, the value is less. Since G
(shear modulus) is not very much affected by a small variation in J.,l, Menard proposed a constant value of 0.33 for J.,l. As such the resulting deformation modulus is called Menard's Modulus Em' The equation for Em reduces to
The following empirical relationship has been established from the results obtained from pressuremeter tests. Undrained shear strength C
u as a function of the limit pressure pz may be
expressed as
Pi c =-
u 9 where Pi = Pi - Poh and Poh = total horizontal earth pressure for the at rest condition.
