Question

PART IV SHEAR STRENGTH OF SOILS 38 pts PROBLEM 4.1 a) A triaxial consolidated drained test is performed on a NC clay with ?.-700 kPa and uo-200. The additional axial stress applied through the piston during the shear phase is 1130 kPa. What is the angle of internal friction of the clay (assume c'-0)? Draw total and effective stress Mohr circles for pre-shear and failure conditions. Indicate position of failure plane b) A duplicate specimen is tested undrained following identical consolidation procedure (i.e. at the end of consolidation ?.-700 kPa and u.-200) Shear is performed increasing the axial stress while ?3-Og is kept fixed. At failure the pore pressure u=355 kPa. What is value of (?1-Og)/2 at failure? Draw total and effective stress Mohr circles for pre-shear and failure conditions. Indicate position of failure plane NOTE: do not go crazy with geometry Read problem carefully, understand what is happening to various stresses, make use of basic effective stress principle and of expressions linking ?', ?' and ?,

Answer 1

Answer4.2-

1. True

2.true

3.True
forsh 260

okea OD 2あ 17

4.True

5.True

6.True