After assembly of a heavy structure is estimated that the stress state in the rock foundation will be essentially two-dimensional such as shown in Fig. If the rock is stratified so that the layers form an angle of 30 ? to the vertical, is it permissible to advance state of stress? Assume that the static friction coefficient of rock on rock is 0.50 and along bedding planes cohesion is 85 kN / m2.

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Estrato rocoso 30° 100 psi -20 psi Estrato rocoso 30° 100 psi -20 psi