matakuliah: s2094 / rekayasa pondasi tahun: 2005 versi: 1.1 pertemuan 07 daya dukung pondasi dangkal
TRANSCRIPT
![Page 1: Matakuliah: S2094 / Rekayasa Pondasi Tahun: 2005 Versi: 1.1 Pertemuan 07 Daya Dukung Pondasi Dangkal](https://reader030.vdocument.in/reader030/viewer/2022013105/56649c885503460f9494069d/html5/thumbnails/1.jpg)
MatakuliahMatakuliah : S2094 / Rekayasa Pondasi: S2094 / Rekayasa Pondasi
TahunTahun : 2005: 2005
VersiVersi : 1.1: 1.1
Pertemuan 07Pertemuan 07Daya Dukung Pondasi DangkalDaya Dukung Pondasi Dangkal
![Page 2: Matakuliah: S2094 / Rekayasa Pondasi Tahun: 2005 Versi: 1.1 Pertemuan 07 Daya Dukung Pondasi Dangkal](https://reader030.vdocument.in/reader030/viewer/2022013105/56649c885503460f9494069d/html5/thumbnails/2.jpg)
Shallow FoundationsShallow Foundations
• Shallow Foundations versus Deep Shallow Foundations versus Deep FoundationsFoundations
![Page 3: Matakuliah: S2094 / Rekayasa Pondasi Tahun: 2005 Versi: 1.1 Pertemuan 07 Daya Dukung Pondasi Dangkal](https://reader030.vdocument.in/reader030/viewer/2022013105/56649c885503460f9494069d/html5/thumbnails/3.jpg)
Shallow FoundationsShallow Foundations
• Usually the more economical optionUsually the more economical option• As a general rule, consider deep As a general rule, consider deep
foundations only when shallow foundations only when shallow foundations do not give satisfactory foundations do not give satisfactory designdesign
• Types of Shallow foundationsTypes of Shallow foundations• Spread footings (square, circular, Spread footings (square, circular,
rectangular)rectangular)• Combined FootingsCombined Footings• Continuous Footings Continuous Footings • Mat or Raft Foundations Mat or Raft Foundations
![Page 4: Matakuliah: S2094 / Rekayasa Pondasi Tahun: 2005 Versi: 1.1 Pertemuan 07 Daya Dukung Pondasi Dangkal](https://reader030.vdocument.in/reader030/viewer/2022013105/56649c885503460f9494069d/html5/thumbnails/4.jpg)
![Page 5: Matakuliah: S2094 / Rekayasa Pondasi Tahun: 2005 Versi: 1.1 Pertemuan 07 Daya Dukung Pondasi Dangkal](https://reader030.vdocument.in/reader030/viewer/2022013105/56649c885503460f9494069d/html5/thumbnails/5.jpg)
![Page 6: Matakuliah: S2094 / Rekayasa Pondasi Tahun: 2005 Versi: 1.1 Pertemuan 07 Daya Dukung Pondasi Dangkal](https://reader030.vdocument.in/reader030/viewer/2022013105/56649c885503460f9494069d/html5/thumbnails/6.jpg)
Combined/Strap FootingCombined/Strap Footing
![Page 7: Matakuliah: S2094 / Rekayasa Pondasi Tahun: 2005 Versi: 1.1 Pertemuan 07 Daya Dukung Pondasi Dangkal](https://reader030.vdocument.in/reader030/viewer/2022013105/56649c885503460f9494069d/html5/thumbnails/7.jpg)
Construction MethodsConstruction Methods
• Excavation; Backhoe followed by Excavation; Backhoe followed by handworkhandworko Neat footing-no formwork usedNeat footing-no formwork usedo Formed footingFormed footing
![Page 8: Matakuliah: S2094 / Rekayasa Pondasi Tahun: 2005 Versi: 1.1 Pertemuan 07 Daya Dukung Pondasi Dangkal](https://reader030.vdocument.in/reader030/viewer/2022013105/56649c885503460f9494069d/html5/thumbnails/8.jpg)
Mat (or Raft) FoundationMat (or Raft) Foundation
![Page 9: Matakuliah: S2094 / Rekayasa Pondasi Tahun: 2005 Versi: 1.1 Pertemuan 07 Daya Dukung Pondasi Dangkal](https://reader030.vdocument.in/reader030/viewer/2022013105/56649c885503460f9494069d/html5/thumbnails/9.jpg)
Computation of Bearing Computation of Bearing PressurePressure
Bearing PressureBearing Pressure– Gross Bearing Pressure (q)Gross Bearing Pressure (q)– Net Bearing Pressure(qNet Bearing Pressure(q´)´)
Bearing CapacityBearing Capacity– Ultimate Bearing Capacity (qUltimate Bearing Capacity (qultult))
– Allowable Bearing Capacity (qAllowable Bearing Capacity (qa)a)
![Page 10: Matakuliah: S2094 / Rekayasa Pondasi Tahun: 2005 Versi: 1.1 Pertemuan 07 Daya Dukung Pondasi Dangkal](https://reader030.vdocument.in/reader030/viewer/2022013105/56649c885503460f9494069d/html5/thumbnails/10.jpg)
![Page 11: Matakuliah: S2094 / Rekayasa Pondasi Tahun: 2005 Versi: 1.1 Pertemuan 07 Daya Dukung Pondasi Dangkal](https://reader030.vdocument.in/reader030/viewer/2022013105/56649c885503460f9494069d/html5/thumbnails/11.jpg)
Computation of Bearing Computation of Bearing PressurePressure
Column Load (Ex 5.1)Column Load (Ex 5.1)
Wall Load (Ex 5.2)Wall Load (Ex 5.2)D
f uA
WPq
D
f
uB
bW
bP
q
![Page 12: Matakuliah: S2094 / Rekayasa Pondasi Tahun: 2005 Versi: 1.1 Pertemuan 07 Daya Dukung Pondasi Dangkal](https://reader030.vdocument.in/reader030/viewer/2022013105/56649c885503460f9494069d/html5/thumbnails/12.jpg)
Net Bearing PressureNet Bearing PressureNet Bearing Pressure (qNet Bearing Pressure (q´) ´)
Floating FoundationFloating Foundation– When qWhen q´ = 0´ = 0– ExampleExample: Student Center Building at MIT: Student Center Building at MIT
Estimated without floatation settlement = 1.0ft Estimated without floatation settlement = 1.0ft and settlement with partial floatation was 2-3 and settlement with partial floatation was 2-3 inchesinches
zoqq
![Page 13: Matakuliah: S2094 / Rekayasa Pondasi Tahun: 2005 Versi: 1.1 Pertemuan 07 Daya Dukung Pondasi Dangkal](https://reader030.vdocument.in/reader030/viewer/2022013105/56649c885503460f9494069d/html5/thumbnails/13.jpg)
![Page 14: Matakuliah: S2094 / Rekayasa Pondasi Tahun: 2005 Versi: 1.1 Pertemuan 07 Daya Dukung Pondasi Dangkal](https://reader030.vdocument.in/reader030/viewer/2022013105/56649c885503460f9494069d/html5/thumbnails/14.jpg)
Eccentric Loads or MomentsEccentric Loads or Moments
![Page 15: Matakuliah: S2094 / Rekayasa Pondasi Tahun: 2005 Versi: 1.1 Pertemuan 07 Daya Dukung Pondasi Dangkal](https://reader030.vdocument.in/reader030/viewer/2022013105/56649c885503460f9494069d/html5/thumbnails/15.jpg)
Eccentric Loads or MomentsEccentric Loads or Moments
![Page 16: Matakuliah: S2094 / Rekayasa Pondasi Tahun: 2005 Versi: 1.1 Pertemuan 07 Daya Dukung Pondasi Dangkal](https://reader030.vdocument.in/reader030/viewer/2022013105/56649c885503460f9494069d/html5/thumbnails/16.jpg)
Eccentric Loads or MomentsEccentric Loads or Moments
B
eu
A
WPq D
f 61min
B
eu
A
WPq D
f 61max
![Page 17: Matakuliah: S2094 / Rekayasa Pondasi Tahun: 2005 Versi: 1.1 Pertemuan 07 Daya Dukung Pondasi Dangkal](https://reader030.vdocument.in/reader030/viewer/2022013105/56649c885503460f9494069d/html5/thumbnails/17.jpg)
Two-way Eccentric Loads or Two-way Eccentric Loads or MomentsMoments
![Page 18: Matakuliah: S2094 / Rekayasa Pondasi Tahun: 2005 Versi: 1.1 Pertemuan 07 Daya Dukung Pondasi Dangkal](https://reader030.vdocument.in/reader030/viewer/2022013105/56649c885503460f9494069d/html5/thumbnails/18.jpg)
Eccentric Loads or MomentsEccentric Loads or Moments
L
e
B
eu
A
WPq LB
Df 661
For contact pressure to remain (+) ve everywhere,
0.166
L
e
B
e LB