2. Direct shear tests were performed on sandy clay samples. The specimen cross section was 60 mm x 60 mm and the proving ring constant is 11.1 N per division. Test

results are given in the following table. Determine graphically the shear strength parameters (ignore the effect of changing sheared areas during test). Would failure occur on a plane within this soil at a point where the normal stress is 300 kN/m² and the corresponding shear stress is 115 kN/m²? Test No. Normal Force Proving Ring Reading at failure (N) (N) 360 23.4 720 34.2 1080 46.8 1440 57.6 1234 4