Analisa Stabilitas Embung Geo Studio SlopeW 2007
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1. Parameter Material Embung Brami Analisa Stabilitas Berbagai Kondisi Menggunakan Geo Studio Slope/W 2007 Tabel 1.1 Faktor aman minimum untuk bendungan urugan (Lambe dan Itman.1969 dan Sherad et al., 1963) Faktor Am an M inimum 1 A khirpelaksanaan 1,3* Lereng hulu dan hilir 2 Penurunan aircepat(sudden drow dow n) 1,0* H anya lereng hulu darikondisiairpenuh 3 Penurunan aircepat(sudden drow dow n) 1,2** H anya lereng hulu daripuncak bendungan elak (spillw ay) 4 M uka airparsialsaatrem besan tetap 1,5 H anya lereng hulu (steady seepage) 5 Rem besan tetap dengan m uka air 1,5 Lereng hilir m aksim um 6 G em pa bum i(kasus1,4,5 dengan 1,0 Lereng hulu dan hilir beban gem pa) * U ntuk tinggitim bunan 15 m atau pondasirelatiflunak gunakan fakto am an F = 1,4. ** Faktoram an m inim um harus1,5 jika dalam hitungan stabilitaslereng kecepatan turunnya airdan tekanan airporiditentukan darijaring arus (flow net) K eterangan K ondisiPerancangan (Sumber: Cristady Hardiyatmo, Hary, 2007: 371) Material Unit Weight Cohession Phi (kN/m³) (kPa) (⁰) Timbunan Inti 18.67 0.71 26.28 Timbunan Random 17.64 0.72 25.11 Filter 17.24 0.52 32.00 Rip-rap 22.00 0.00 32.00 Breksi/ Pondasi 25.50 0.00 25.60
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Transcript of Analisa Stabilitas Embung Geo Studio SlopeW 2007
1. Parameter Material Embung Brami
Analisa Stabilitas Berbagai Kondisi Menggunakan Geo Studio Slope/W 2007
Tabel 1.1 Faktor aman minimum untuk bendungan urugan (Lambe dan Itman.1969 dan Sherad et al., 1963)
Faktor Aman
Minimum1 Akhir pelaksanaan 1,3* Lereng hulu dan hilir2 Penurunan air cepat (sudden drowdown) 1,0* Hanya lereng hulu
dari kondisi air penuh3 Penurunan air cepat (sudden drowdown) 1,2** Hanya lereng hulu
dari puncak bendungan elak (spill way)
4 Muka air parsial saat rembesan tetap 1,5 Hanya lereng hulu(steady seepage)
5 Rembesan tetap dengan muka air 1,5 Lereng hilirmaksimum
6 Gempa bumi (kasus 1,4,5 dengan 1,0 Lereng hulu dan hilirbeban gempa)
* Untuk tinggi timbunan 15 m atau pondasi relatif lunak gunakan fakto aman F = 1,4.** Faktor aman minimum harus 1,5 jika dalam hitungan stabilitas lereng kecepatan turunnya
air dan tekanan air pori ditentukan dari jaring arus (flow net)
KeteranganKondisi Perancangan
(Sumber: Cristady Hardiyatmo, Hary, 2007: 371)
A. Tanpa Gempa
MaterialUnit Weight Cohession Phi
(kN/m³) (kPa) (⁰)
Timbunan Inti 18.67 0.71 26.28
Timbunan Random 17.64 0.72 25.11
Filter 17.24 0.52 32.00
Rip-rap 22.00 0.00 32.00
Breksi/Pondasi 25.50 0.00 25.60
1. Kondisi Kosong Sesaat Setelah Kontruksi
1.504
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Ele
vasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Bishop 1.504
1.503
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Ele
vasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Janbu 1.503
1.500
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Ele
vasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Ordinary 1.500
1.500
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Ele
vasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Morgensertn-Price 1.500
1.578
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Elevasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
u/s Bishop 1.578
1.500
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Elevasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
u/s Janbu 1.500
1.512
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Elevasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
u/s Ordinary 1.512
1.577
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Elevasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
u/s Morgenstern-Price 1.577
2. Kondisi TMA +40 m
1.502
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Ele
vasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Bishop 1.502
1.528
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Ele
vasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Janbu 1.528
1.506
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Ele
vasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Ordinary 1.506
1.503
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Ele
vasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Morgensertn-Price 1.503
3. Kondisi TMA +34 m
1.712
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Elevasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Bishop 1.712
1.507
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Elevasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Janbu 1.507
1.503
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Elevasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Ordinary 1.503
1.714
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Ele
vasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Morgenstern-Price 1.714
4. Rapid Drawdown
1.510
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Elevasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Bishop RDD 1.510 (day 15)
1.568
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Elevasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Janbu RDD 1.568 (day 15)
1.501
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Ele
vasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Ordinary RDD 1.501 (day 15)
1.509
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Ele
vasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Morgenstern-Price RDD 1.509 (day 15)
B. Dengan Gempa (kh=0,12)
1. Kondisi Kosong Sesaat Setelah Kontruksi
1.202
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Ele
vasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Bishop gempa 1.202
1.234
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Ele
vasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Janbu gempa 1.234
1.250
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Ele
vasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Ordinary gempa 1.250
1.215
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Elevasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Morgenstern-Price gempa 1.215
1.204
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Ele
vasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
u/s Bishop gempa 1.204
1.202
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Ele
vasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
u/s Janbu gempa 1.202
1.207
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Ele
vasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
u/s Ordinary gempa 1.207
1.202
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Elevasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
u/s Morgenstern-price gempa 1.202
2. TMA + 40 m
1.206
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Elevasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Bishop gempa 1.206
1.204
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Elevasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Janbu gempa 1.204
1.205
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Elevasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Ordinary gempa 1.205
1.203
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Elevasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Morgenstern-Price gempa 1.203
3. TMA + 30 m1.301
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Elevasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Bishop gempa 1.301
1.211
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Elevasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Janbu gempa 1.211
1.200
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70
Elevasi (m
)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Ordinary gempa 1.200
1.315
AS DAM
M.A.N +40.00 m
M.A.M +34.00 m
Jarak (m)
0 1 2 3 4 5 6 7 8 910 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70E
levasi (m)
23
25
27
29
31
33
35
37
39
41
43
45
d/s Morgenstern-price gempa 1.315
C. Rekapitulasi Angka Keamanan Stabilitas Lereng Embung Brami
Dari Analisa Stabilitas lereng Embung Brami dengan Geo Studio 2007 (Slope/W Analysis
Metode Grid And Radius) dari semua kondisi yang telah dianalisa didapatkan hasil angka
keamanan konstruksi embung dalam kondisi AMAN (memenuhi syarat minimum yang
tertera pada Tabel 1.1) dimana hasil rekapitulasi angka keamanan sebagai berikut.
Tanpa Gempa u/s d/s u/s d/s u/s d/s u/s d/sKosong 1.578 1.504 1.514 1.503 1.512 1.500 1.577 1.500Isi TMA + 40 m - 1.502 - 1.528 - 1.506 - 1.503Isi TMA + 34 m - 1.712 - 1.507 - 1.503 - 1.714Rapid drawdown - 1.510 - 1.568 - 1.501 - 1.509Gempa ( k=0.12) u/s d/s u/s d/s u/s d/s u/s d/sKosong 1.204 1.202 1.202 1.234 1.207 1.250 1.202 1.215Isi TMA + 40 m - 1.206 - 1.204 - 1.205 - 1.203Isi TMA + 34 m - 1.301 - 1.211 - 1.200 - 1.315
Kondisi PembebananBishop Janbu Ordinary Morgenstern
Metode Analisis
