Question

A 5 m high steep slope with a slope angle of 60 is to be built on a firm foundation. The fill has a unit weight of 19.5 kN/m3. effective cohesion of 0 kPa, and effective friction angle of 34. The surcharge on top of the slope is 12 kPa. Ten layers of geosynthetic reinforcement are uniformly distributed with the slope height. The required factor of safety is 1.5. Use the design charts by Schmertmann et al. (1987) to develop the cross section of the geosynthetic-reinforced slope.

Answer 1

To design the cross section of the geosynthetic-reinforced slope, we will use the design charts by Schmertmann et al. (1987).

Determine the required factor of safety (FS) for the slope stability: FS = 1.5

Determine the soil properties:

Unit weight of the fill (γ) = 19.5 kN/m3

Effective cohesion (c') = 0 kPa

Effective friction angle (φ') = 34 degrees

Determine the surcharge load (q) on top of the slope: q = 12 kPa

Step-by-step explanation: