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

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Bina Nusantara CONTENT SLOPE FAILURE AND SLOPE STABILITY (SESSION 25- 26 : F2F) BISHOP METHOD (SESSION 25-26 : F2F)

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Bina Nusantara 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

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Bina Nusantara SLOPE FAILURE

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Bina Nusantara FAILURE TYPE ROTATIONAL

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Bina Nusantara FAILURE TYPE TRANSLATIONAL

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Bina Nusantara FAILURE TYPE FALLING

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Bina Nusantara FAILURE TYPE BLOCK SLIDE

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Bina Nusantara FAILURE TYPE TOPPLE

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Bina Nusantara FAILURE TYPE FLOW

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Bina Nusantara SLOPE FAILURE

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Bina Nusantara SLOPE FAILURE

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Bina Nusantara SLOPE FAILURE

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Bina Nusantara SLOPE FAILURE

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Bina Nusantara SLOPE FAILURE

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Bina Nusantara 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

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Bina Nusantara PARAMETER AND ANALYSIS PARAMETER –TOTAL ( , c, ) –EFFECTIVE ( ’, c’, ’) ANALISIS –LIMIT EQUILIBRIUM THEORY (MOHR COULOMB FAILURE CRITERIA) FORCE EQUILIBRIUM FORCE AND MOMENT EQUILIBRIUM

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Bina Nusantara 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

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Bina Nusantara TRANSLATIONAL LANDSLIDE INFINITE SLOPE –COHESIVE SOIL –COHESIONLESS SOIL FINITE SLOPE –PLANE FAILURE SURFACE –BLOCK SLIDE ANALYSIS

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Bina Nusantara 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

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Bina Nusantara ROTATIONAL LANDSLIDE METHOD OF SLICES

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Bina Nusantara ROTATIONAL LANDSLIDE ORDINARY METHOD OF SLICES (OMS)

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Bina Nusantara ROTATIONAL LANDSLIDE SIMPLIFIED BISHOP METHOD

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Bina Nusantara 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 (35,1;55) (20;20) 38,1 m = 16 kN/m 3 = 20 o c = 20 kN/m 2 Determine the safety factor of slope base on : -Ordinary Method of Slices -Bishop’s Method

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Bina Nusantara ROTATIONAL LANDSLIDE

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Bina Nusantara ROTATIONAL LANDSLIDE

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Bina Nusantara ROTATIONAL LANDSLIDE

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Bina Nusantara SOLUTION GRAVITY WALL

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Bina Nusantara SOLUTION SOIL NAILING (TIE BACK)

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Bina Nusantara SOLUTION SHEET PILE, PILE

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Bina Nusantara SOLUTION REINFORCEMENT (STEEL, GEOSYNTHETIC)

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