Question: With reference to the generic wedge shown in the sketch and the data in Table 2.9, the water table is below the toe, vertical distance

With reference to the generic wedge shown in the sketch and the data in Table 2.9, the water table is below the toe, vertical distance between A and O is 85 ft (25.9 m), point T is 40 ft from point A, rock specific weight is 158pcf (25.0kN/m3), and active wedge volume is 3,850 yd3 (2,944 m3).

(a) Find the dip direction (azimuth) and dip of the line of intersection of joint planes A and B.

(b) Find the range of intersection line azimuths that preclude sliding down the line of intersection.

Area fi? Friction angle Direction angles Dip dir. Parameter Dip Cohesion psf

Area fi? Friction angle Direction angles Dip dir. Parameter Dip Cohesion psf (kPa) (m) () () plane of normals a, B.y () Joint A Joint B Face 2,800 (134) 5.280 (253) 30 60 26 120 60 32 75 85 Upland Tension crack 65 55 75 39 Tension crack 8. iw Top of B. 6. slope face H=vertical distance Toe of slope

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