As noted in Fig. 7.16, the state of stress shifts from plane stress to plane strain as the ratio of length-of-bend to sheet thickness increases. Explain why. This situation….
how many layers of geogrid are required to raise the factor of safety to 1.4?
An existing roadside embankment needs to be reinforced using
geogrid sheets. The embankment is 15-m high and the slope angle
is 40°. The in situ soil will be used as the reinforced backfill. The
soil strength parameters are f = 220 and c = 15 kN∕m² in both the
embankment and foundation sections. The unit weight is 17.3 kN∕m³.
The critical failure surface is assumed to be a toe circle, and the center
is located at (+3 m, +18 m) with respect to the toe at (0,0). Assume
the groundwater table is far below the foundation. The ultimate
tensile strength of the geogrid is 75 kN∕m. The vertical spacing is
chosen to be 40 cm. For the critical failure circle, how many layers of
geogrid are required to raise the factor of safety to 1.4?