Simulation of Retaining Wall in GeoStudio for Slope Stabilization

Introduction

• Objective: Simulate retaining wall in GeoStudio for slope stabilization.

Geometry Setup

• Coordinates: Provided for geometry generation in GeoStudio.
• Software Version: GeoStudio 2021.
• Type of Analysis: Slope W analysis.
• Settings:
  • Title: (to be defined by user)
  • Isometric line with Ru coefficient for slip surface.
  • Failure surface direction: Right to left.
  • Gradient radius selected.

Axis Configuration

• X-axis:
  • Minimum value: 30 m
  • Auto increment size: 0.2 m
• Y-axis:
  • Minimum value: 20 m
  • Auto increment size: 0.2 m

Drawing Geometry

• Copy and paste provided coordinates to define points.
• Regions to Draw:
  • Four regions corresponding to the retaining wall geometry.

Material Definition

• Define Material:
  1. Backfill:
     • Unit weight: 18 kN/m³
     • Cohesion: 2 kPa
     • Angle of internal friction: 25°
  2. Layer 1:
     • Unit weight: 16.5 kN/m³
     • Cohesion: 15 kPa
     • Angle of internal friction: 10°
  3. Layer 2:
     • Unit weight: 18.5 kN/m³
     • Cohesion: 15 kPa
     • Angle of internal friction: 30°
  4. Cantilever Retaining Wall:
     • Unit weight: 24.5 kN/m³
     • Cohesion: 7.25 kPa
     • Angle of internal friction: 89° (GeoStudio does not accept 90°)

Assigning Materials to Geometry

• Materials assigned based on defined layers and retaining wall.

Piezometric Line

• Draw piezometric line representing groundwater table for each layer.

Grid and Radius Definition

• Slip Surface Grids:
  • Radius defined for analysis.

Running the Analysis

• Save Analysis: Title as "Concrete Retaining Wall".
• Results:
  • Factor of Safety: 2.59 with provided properties.

Conclusion

• Review of slip surface passing through toe of the retaining wall.
• Encouraged to explore more features in GeoStudio.
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