Stochastic analysis of geotextile reinforced retaining wall by limit equilibrium method

Geosynthetic reinforced retaining walls are widely used in engineering projects due to their advantages of simple construction, low environmental impact, and aesthetics. Geosynthetic reinforced walls are the least expensive of all wall categories and at all wall heights. This study investigates the stochastic application of the limit equilibrium method in the internal and external stability of the geotextile reinforced retaining walls. The selected stochastic parameters are the internal friction angle of the backfill and the foundation soil, the specific gravity of the backfill and the foundation soil, and the cohesion of the foundation soil, which are modeled using the normal distribution. Geometry parameters are considered deterministic parameters. Stochastic analysis was performed using Monte Carlo Simulation (MCS). For this purpose, a coded program in MATLAB has been developed. Safety factors related to internal stability, including rupture and pullout of geotextile, and safety factors related to external stability, including sliding, overturning, and bearing capacity of the foundation, have been calculated, the reliability indices of all safety coefficients have been calculated. The internal and external stability reliability indices indicate that the lowest value is related to the sliding safety factor, and the greater value is related to the overturning safety factor. It can be concluded that considering the uncertainty of soil parameters, sliding control of a wall reinforced with geotextiles should be more attended.

Keywords:

Geotextile , Limit equilibrium method , Stochastic analysis , Retaining wall