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TOPIC 7 SLOPE STABILITY

TOPIC 7 SLOPE STABILITY. Course : S0705 – Soil Mechanic Year : 2008. CONTENT. SLOPE FAILURE AND SLOPE STABILITY (SESSION 25-26 : F2F) BISHOP METHOD (SESSION 25-26 : F2F). SLOPE FAILURE. CAUSAL FACTOR OF FAILURE THE SLOPE IS TOO STEEP UNSUITABLE OF SOIL PROPERTIES LESS COMPACTION

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TOPIC 7 SLOPE STABILITY

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  1. TOPIC 7 SLOPE STABILITY Course : S0705 – Soil Mechanic Year : 2008

  2. CONTENT • SLOPE FAILURE AND SLOPE STABILITY (SESSION 25-26 : F2F) • BISHOP METHOD (SESSION 25-26 : F2F)

  3. SLOPE FAILURE • CAUSAL FACTOR OF FAILURE • THE SLOPE IS TOO STEEP • UNSUITABLE OF SOIL PROPERTIES • LESS COMPACTION • INFLUENCE OF PORE WATER AND OR RAIN • EARTHQUAKE • LIQUIFACTION • HUMAN MANNER

  4. SLOPE FAILURE

  5. FAILURE TYPE • ROTATIONAL

  6. FAILURE TYPE • TRANSLATIONAL

  7. FAILURE TYPE • FALLING

  8. FAILURE TYPE • BLOCK SLIDE

  9. FAILURE TYPE • TOPPLE

  10. FAILURE TYPE • FLOW

  11. SLOPE FAILURE

  12. SLOPE FAILURE

  13. SLOPE FAILURE

  14. SLOPE FAILURE

  15. SLOPE FAILURE

  16. SLOPE STABILITY • PURPOSE • SLOPE STABILITY ANALYSIS AGAINST LANDSLIDE • SELECTION OF THE SUITABLE SOIL PARAMETER • THE USE OF APPROPRIATE CALCULATION METHOD INCLUDE USING COMPUTER SOFTWARE • EFFICIENCY AND EFFECTIVENESS SOLUTION METHODS

  17. PARAMETER AND ANALYSIS • PARAMETER • TOTAL (, c, ) • EFFECTIVE (’, c’, ’) • ANALISIS • LIMIT EQUILIBRIUM THEORY (MOHR COULOMB FAILURE CRITERIA) • FORCE EQUILIBRIUM • FORCE AND MOMENT EQUILIBRIUM

  18. CALCULATION METHOD • FORCE EQUILIBRIUM • ORDINARY METHOD OF SLICES (OMS) • SIMPLIFIED BISHOP • SIMPLIFIED JANBU • CORPS OF ENGINEER • LOWE AND KARAFIATH • GENERALIZED JANBU • FORCE AND MOMENT EQUILIBRIUM • BISHOP’S RIGOROUS • SPENCER • SARMA • MORGENSTERN-PRICE

  19. TRANSLATIONAL LANDSLIDE • INFINITE SLOPE • COHESIVE SOIL • COHESIONLESS SOIL • FINITE SLOPE • PLANE FAILURE SURFACE • BLOCK SLIDE ANALYSIS

  20. ROTATIONAL LANDSLIDE • CIRCULAR SURFACE ANALYSIS • CIRCULAR ARC (U = 0) METHOD • FRICTION CIRCLE METHOD • METHOD OF SLICE • ORDINARY METHOD OF SLICES (OMS) • JANBU’S SIMPLIFIED METHOD • BISHOP’S SIMPLIFIED METHOD • MORGENSTERN – PRICE METHOD • ETC

  21. ROTATIONAL LANDSLIDE • METHOD OF SLICES

  22. ROTATIONAL LANDSLIDE • ORDINARY METHOD OF SLICES (OMS)

  23. ROTATIONAL LANDSLIDE • SIMPLIFIED BISHOP METHOD

  24. (35,1;55) 38,1 m •  = 16 kN/m3 • = 20 o c = 20 kN/m2 (20;20) ROTATIONAL LANDSLIDE • A Slope of 20 m height and angle 2H:1V had been landslide as shown in following figure. The center of failure circle is at (35.1;55) and the failure circle radius is 38.1 m • Determine the safety factor of slope base on : • Ordinary Method of Slices • Bishop’s Method

  25. ROTATIONAL LANDSLIDE

  26. ROTATIONAL LANDSLIDE

  27. ROTATIONAL LANDSLIDE

  28. SOLUTION • GRAVITY WALL

  29. SOLUTION • SOIL NAILING (TIE BACK)

  30. SOLUTION • SHEET PILE, PILE

  31. SOLUTION • REINFORCEMENT (STEEL, GEOSYNTHETIC)

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