A pressuremeter test was carried out at a site at a depth of 7 m below the ground surface. The water table level was at a depth of 1.5 m. The average unit weight of saturated soil is 17.3 kN/m3. The corrected pressuremeter curve is given in Fig. Ex. 9.11 and the depleted volume of the probe is Vc=535cm3. Determine the following
(a) The coefficient of earth pressure for the at-rest condition
(b) The Menard pressuremeter modulus Em
(c) The undrained shear strength cu. Assume that poh =pom in this case