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Analysis of Slope Stability & Design of Retaining Structure & Foundation for Multi-story Building

Analysis of Slope Stability & Design of Retaining Structure & Foundation for Multi-story Building. Graduation Project Seminar. 2011-2012. Analysis of Slope Stability Design of Retaining Structure Design of Foundation for Multi-Story Building. Overview. AL-Iskan road at AL-Junaid district.

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Analysis of Slope Stability & Design of Retaining Structure & Foundation for Multi-story Building

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  1. Analysis of Slope Stability & Design of Retaining Structure & Foundation for Multi-story Building Graduation Project Seminar 2011-2012

  2. Analysis of Slope Stability • Design of Retaining Structure • Design of Foundation for Multi-Story Building Overview

  3. AL-Iskan road at AL-Junaid district. Study Area

  4. Surveying Plan

  5. Longitudinal Cross Section for the site

  6. Slope stability is the slope of the soil that make it stable. Slope Stability

  7. There are several method to analysis slope stability: • Infinite Slope. • Logarithmic Spiral. • Spencer. • Morgenstern & Price. Method of Analysis

  8. The project is dealing with slope of the soil by using GeoStudio software. • This software is based on Morgenstern & Price method. • It gives you a simple analysis for slope stability and critical slip for the soil. GeoStudio Software

  9. Model: Mohr-Coulomb Unit Weight: 20 kN/m³ Cohesion: zero kPa Phi: 20 ° Bedrock Slope Profile

  10. Results

  11. Critical slip at radius = .782 Results

  12. Grouting and Injection. • Injection of pile. • Cement grout. • Vegetation. • Retaining Structure. • These methods increase the resistance and shear strength of the soil. Improvement Stability of Slope

  13. Retaining Wall. • Boulders Wall. • Retaining structure are designed using prokon and Geo5 software. Retaining Structure

  14. Soil properties • Bearing capacity = 250 KN/m² • Ø=20ᵒ, f’c=28 MPa, Fy=420 MPa, gsoil =20 KN/m2 • Surcharge = 15 KN/m2 Retaining Wall

  15. Wall Layout

  16. Safety factor against overall sliding = Fr/Fh = 1.519 • Safety factor against overturning = Mr/Mo = 5.072 • Over turning(manually)= 3 • Safety factor against sliding = 1.5 • Safety factor against overturning = 2.5 • (Seismic Design ) Verifications

  17. Base bending moment

  18. Wall bending moment

  19. Reinforcement

  20. Properties of boulders • Unit weight=25KN/m² • Angle of internal friction=30° • Cohesion=0 Boulders wall

  21. Boulders Dimensions

  22. Building’s Columns

  23. Using AllPile software to design pile foundation. • design for two diameter (60, 80) cm and 3lengths (10, 12, 15) m. • Soil properties: • C=40KN/m² , Phi=15° , Unit weight=18KN/m³ Pile Foundation

  24. Selected Piles

  25. Selected Piles

  26. Group of piles

  27. Design pile footing for column (20*80 cm). • Diameter= 80 cm f’c=400 kg/cm² =32 MPa L=12 m #of piles = 4 piles • Allowable capacity=2940 KN • pult. =2836 KN • pserv. =2157 KN Pile Cap Fu=2836/4=709 KN

  28. Plane for pile cap

  29. H=600mm Depth of pile Cap

  30. THANK YOU

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