03- jenis pondasi · - pondasi sumuran (well foundation) - pondasi kaison (caisson foundation)
TRANSCRIPT
Jenis Pondasi
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Pondasi?
Jenis Pondasi
1. PONDASI DANGKAL (SHALLOW FOUNDATION)- pondasi telapak (spread footing)
a. isolated footing (bujur sangkar, lingkaran, empat persegi)
b. combined footingc. continous footing (pondasi menerus)
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c. continous footing (pondasi menerus)
- pondasi rakit (raft / mat foundation) 2. PONDASI DALAM (DEEP FOUNDATION)
- pondasi tiang (pile foundation)- pondasi sumuran (well foundation)- pondasi kaison (caisson foundation)
• Shallow Foundations versus Deep Foundations
Klasifikasi Pondasi
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Shallow FootingsShallow Footings
By definitionBy definitionD/B < 4D/B < 4
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DD
BB
LowLow
Large DistributedLarge DistributedWeightWeight
Very Large ConcentratedVery Large ConcentratedWeightWeight
ApplicationsApplications
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LowLowWeightWeight
WeakWeakSoilSoil
Weak Rock orWeak Rock ordistributed overdistributed overcompetent Soilcompetent Soil
Strong RockStrong Rock
Jenis Pondasi
Wall
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Property line
FOOT_02
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Isolated spread footing Wall footing
FOOT_03
Combined Footings
A B
Rectangular, PA = PB
A B
Rectangular, PA < PB
Property line
Property line
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A B
Rectangular, PA < PB
Property line
A B
Strap or Cantilever
Property line
FOOT_04
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Pile cap
PilesWeak soil
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Mat Footing
Weak soil
Bearing stratum
FOOT_05
Pondasi Cakar Ayam
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Pondasi Cakar Ayam
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Perhitungan Tegangan
� Bearing Pressure (tegangan yg terjadi)� Tegangan yang terjadi ( σ)σ)σ)σ)� Tegangan netto (σ(σ(σ(σ´))))
Bearing Capacity (daya dukung)
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� Bearing Capacity (daya dukung)� Daya dukung batas (q ult )� Daya dukung ijin (q a)
Belajar
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Exams
My mama always said, “Exam is like a box of chocolates; you never know what you
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of chocolates; you never know what you are gonna get”
