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Kriteria Perencanaan

• Konsep Safety Factor– Limit Equilibrium Method

SF=Mresistance

Mdriving

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Kriteria Perencanaan

• Konsep Safety Factor– Safety Factor of Material’s Parameter 

ankeseimbang kondisimencapaiuntuk dibutuhkan yang 

tersedia yang maksimum

S 

S SF 

r r c

cSF 

  

  

tan

tan

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Kriteria Perencanaan

Temporary Permanent Temporary Permanent

No human building 1.3 1.5 1.25 1.3

Many human building 1.5 2 1.3 1.5

Environmentalcondition

Accuracy of soil parameters

Less accurate Accurate

Temporary Permanent Temporary Permanent

No human building 1.3 1.5 1.25 1.3

Many human building 1.5 2 1.3 1.5

Environmentalcondition

Accuracy of soil parameters

Less accurate Accurate

Small Large

Cost of repair comparable to cost ofconstruction. No danger to human life or

other property if slope fails

1.25 1.5

Cost of repair much greater than cost of

construction or danger to human life or

other valuable property if slope fails

1.5 2

Costs and consequences of slope

failure

Uncertainty of strength

Measurements

Small Large

Cost of repair comparable to cost ofconstruction. No danger to human life or

other property if slope fails

1.25 1.5

Cost of repair much greater than cost of

construction or danger to human life or

other valuable property if slope fails

1.5 2

Costs and consequences of slope

failure

Uncertainty of strength

Measurements

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TALUD MENERUS TANPAREMBESAN

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TALUD MENERUS DENGANREMBESAN

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Tegangan geser aksita

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Mencari sudut longsor

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MetodePotongan

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Metode

Irisan Bishop

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MEMPREDIKSI LINGKARANKRITIS

• Menghitung angka keamanan pada sejumlah lingkaran denganketentuan :

– Semua lingkaran menyinggung elevasi yang sama

– Semua lingkaran melalui kaki sloof

• Tulis angka keamanan di titik pusat lingkaran, dan buat kontur

angka keamaan. Jika kontur tidak memusat di minimum. Buatlagi lingkaran kritis

• Hitung angka keamanan terhadap lingkaran yang lain denganelevasi yang berbeda, dan ulangi langkah 2.

Ulangi proses ini sampai semua lingkaran kritis di coba didalamlereng. Prosedur yang baik adalah melokasikan lingkaran kritis padakaki lereng dulu, baru mencoba elevasi yang lebih tinggi atau rendahuntuk memastikan angka keamanan yang lebih rendah

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