Point loads of magnitude 100, 200, and 400 kN act at A, B, and C, respectively. the increase in vertical stress at a depth of 6 m below point D is nearly (kN/m2) B 3 m 3m C 1.5 m 1.5 0.9 1.3

Homeworks 3.2 Three point loads, 10 000 kN, 7500 kN and 9000 kN, act in line 5 m apart on the surface of a soil mass. Calculate the vertical stress at a depth of 4 m vertically below the center (7500 kN) load. 10000 kN 5 m 7500 kN 5 m 9000 kN X 4 m M

Note:hand written solution should be avoided.

Referring to Figure Q2 (a), the vertical stress increase at point A is 25 kN/m2due to application of line loads q1 and q2. Determine the magnitude of q2.

A level ground surface exists in an area where soil in the underlying stratum has a wet unit weight of 19 kN/m3. The vertical pressure at any depth represents the major principal stress. The vertical pressure (stress) is the product of the soil unit weight and depth. The lateral pressure at a corresponding depth is 0.45 times the vertical pressure and represents the minor principal stress. (a) Determine the principal stresses acting at a depth 4 m below the surface, and draw the Mohr’s circle for the condition. (b) What is the maximum shear stress acting at this depth?

2. Find the induced stress at point B at depth 20 ft below the surface. The bearing pressure on the area is 400 psf. 40 ft 35 ft 70 ft