tugas ke iv mekanika tanah i, redha arima rm
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Tugas Mekanika Tanah I REDHA ARIMA RM
Tugas Ke IV 1310015211116
=TUGAS =
SOAL 1
No
Diameter Massa Tanah % Tanah
% Tanah Lolos
Ayakan Tertahan Tertahan
Pada Tiap
USA ayakan Pada Tiap Ayakan Ayakan Pada Tiap Ayakan
(mm) (gr) (gr) (gr)
.(1) .(2) .(3) .(4) .(5)
4 4.75 0 0 100
10 2 21.6 4.8 95.2
20 0.85 49.5 11 84.2
40 0.425 102.6 22.8 61.4
60 0.25 89.1 19.8 41.6
100 0.15 95.6 21.24 20.36
200 0.075 60.4 13.42 6.93
pan 31.2 6.93 0
Total 450
DISTRIBUSI BUTIRAN
100
90
80
70
Lo
los D
60 60
50
%
40
D
30 30
20
D
10 10
0.09
0.19 0.4
0
0.01 0.1 1 10
Diameter Butiran (mm)
Dia (mm) Cu Cc
D10 0.09 4.4 1.00 D30 0.19
D60 0.4
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SOAL 2
Diketahui : D10 = 0.1 mm
D30 = 0.41 mm
D60 = 0.62 mm
Ditanya : Koefisien Keseragaman (CU) dan Koefisien Gradasi (CC)
Jawab:
C = D
60 = 0.62 = 6.2
U D
10 0.1
CC =
(D )2
=
(0.41) 2
= 2.711
30
D60
xD10 0.62x0.1
SOAL 3
Diketahui : D10 = 0.082 mm
D30 = 0.29 mm D60 = 0.51 mm
Ditanya : Koefisien Keseragaman (CU) dan Koefisien Gradasi (CC) Jawab:
CU = D60 =
0.51 = 6.222
D10 0.082
CC = (D )2 (0.29) 2
= 2.011 30 =
0.51x0.82
D
60
xD10
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SOAL 4
No
Diameter Massa Tanah % Tanah
% Tanah Lolos
Ayakan Tertahan Tertahan
Pada Tiap
USA ayakan Pada Tiap Ayakan Ayakan Pada Tiap Ayakan
(mm) (gr) (gr) (gr)
.(1) .(2) .(3) .(4) .(5)
4 4.75 0 0 100
6 3.35 30 6 94
10 2 48.7 9.74 84.26
20 0.85 127.3 25.46 58.8
40 0.425 96.8 19.36 39.44
60 0.25 76.6 15.32 24.12
100 0.15 55.2 11.04 13.08
200 0.075 43.4 8.68 4.40
pan 22 4.40 0.00
Total 500
DISTRIBUSI BUTIRAN
100
90
80
70
Lo
los D
60 60
50
%
40
D
30 30
20
D
10 10
0.01 0.1 0.125 0.31 0 0.95
10
1
Diameter Butiran (mm)
Dia
Cu
Cc
(mm)
D10 0.125 7.6 0.81
D30 0.31
D60 0.95
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SOAL 5
No
Diameter Massa Tanah % Tanah
% Tanah Lolos
Ayakan Tertahan Tertahan
Pada Tiap
USA ayakan Pada Tiap Ayakan Ayakan Pada Tiap Ayakan
(mm) (gr) (gr) (gr)
.(1) .(2) .(3) .(4) .(5)
4 4.75 0 0 100
6 3.35 0 0 100
10 2 0 0 100
20 0.85 9.1 1.82 98.18
40 0.425 249.4 49.88 48.3
60 0.25 179.8 35.96 12.34
100 0.15 22.7 4.54 7.80
200 0.075 15.5 3.10 4.70
pan 23.5 4.70 0.00
Total 500
DISTRIBUSI BUTIRAN
100
90
80
70
Lo
los D
60 60
50
%
40
D
30 30
20
D
10 10
0.01
0.185 0.325 0.5 0 10
0.1 1
Diameter Butiran (mm)
Dia
Cu
Cc
(mm)
D10 0.185 2.7 1.14
D30 0.325
D60 0.5
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SOAL 6
No
Ayakan Diameter % Tanah Lolos USA ayakan Pada Tiap Ayakan
(mm) (gr) .(1) .(2) .(3) 20 0.85 100 40 0.425 92.1 60 0.25 85.8
0.15 77.3 200 0.075 62
0.04 50.80 0.02 41.00 0.01 34.30 0.006 29.00 0.002 23.00
DISTRIBUSI UKURAN BUTIRAN SISTEM MIT
100 0.002 0.06 2
90
80
Lo
los 70
60
50 58%
%
40
30
20 23%
10
0 Ukuran Butiran (mm)
0.001 0.01 0.1 1
10
Clay Lanau (Silt ) Pasir (Sand ) Kerikil(Gravel )
Persentase Butiran Menurut Sistem MIT
Jenis Tanah % Gravel 0 Sand 42 Silt 35 Clay 23
Total 100
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SOAL 7
No
Ayakan Diameter % Tanah Lolos USA ayakan Pada Tiap Ayakan
(mm) (gr) .(1) .(2) .(3) 20 0.85 100 40 0.425 92.1 60 0.25 85.8
0.15 77.3 200 0.075 62
0.04 50.80 0.02 41.00 0.01 34.30 0.006 29.00 0.002 23.00
DISTRIBUSI UKURAN BUTIRAN SISTEM USDA
100 0.00 0.05 2
90
80
Lo
los
70
60
50 55
%
40
30
20 23
10
0
1 Ukuran Butiran (mm) 10
0.001 0.01 0.1
Clay Lanau (Silt ) Pasir Kerikil(Gravel )
Persentase Butiran Menurut Sistem USDA
Jenis Tanah % Gravel 0 Sand 45 Silt 32 Clay 23
Total 100
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SOAL 8
No
Diameter
% Tanah Lolos
Ayakan
USA ayakan Pada Tiap Ayakan
(mm) (gr)
.(1) .(2) .(3)
20 0.85 100
40 0.425 92.1
60 0.25 85.8
0.15 77.3
200 0.075 62
0.04 50.80
0.02 41.00
0.01 34.30
0.006 29.00
0.002 23.00
DISTRIBUSI UKURAN BUTIRAN SISTEM AASTHO
100 0.00 0.07 2
90
80
Lo
los 70
60 62%
50
%
40
30
20
23%
10
0 Ukuran Butiran (mm)
0.001 0.01 0.1
1 10
Clay Lanau (Silt ) Pasir (Sand ) Kerikil(Gravel )
Persentase Butiran Menurut Sistem AASTHO
Jenis Tanah % Gravel 0 Sand 38 Silt 39 Clay 23
Total 100
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SOAL 9
No
Ayakan Diameter % Tanah Lolos USA ayakan Pada Tiap Ayakan
(mm) (gr) .(1) .(2) .(3) 20 0.85 100 40 0.425 100 60 0.25 94.1
0.15 79.3 200 0.075 34.1
0.04 28.00 0.02 25.20 0.01 21.80 0.006 18.90 0.002 14.00 DISTRIBUSI UKURAN BUTIRAN SISTEM MIT
100 0.002 0.06 2
90
80
Lo
los 70
60
50
%
40
30 32%
20
10 14%
0 Ukuran Butiran (mm)
0.001 0.01 0.1 1
10
Clay Lanau (Silt ) Pasir (Sand ) Kerikil(Gravel )
Persentase Butiran Menurut Sistem MIT
Jenis Tanah % Gravel 0 Sand 68 Silt 18 Clay 14
Total 100
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SOAL 10
No
Ayakan Diameter % Tanah Lolos USA ayakan Pada Tiap Ayakan
(mm) (gr) .(1) .(2) .(3) 20 0.85 100 40 0.425 100 60 0.25 94.1
0.15 79.3 200 0.075 34.1
0.04 28.00 0.02 25.20 0.01 21.80 0.006 18.90 0.002 14.00
0.002
DISTRIBUSI UKURAN BUTIRAN SISTEM USDA
100
0.05 2
90
80
Lo
los 70
60
50
%
40
30
20 29
10 14%
0
1 Ukuran Butiran (mm) 10
0.001 0.01 0.1
Clay Lanau (Silt ) Pasir Kerikil(Gravel )
Persentase Butiran Menurut Sistem USDA Jenis Tanah %
Gravel 0 Sand 71 Silt 15 Clay 14
Total 100
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SOAL 11
No
Ayakan Diameter % Tanah Lolos USA ayakan Pada Tiap Ayakan
(mm) (gr) .(1) .(2) .(3) 20 0.85 100 40 0.425 100 60 0.25 94.1
0.15 79.3 200 0.075 34.1
0.04 28.00 0.02 25.20 0.01 21.80 0.006 18.90 0.002 14.00
0.002
DISTRIBUSI UKURAN BUTIRAN SISTEM AASTHO
100
0.07 2
90
80
Lo
los 70
60
50
%
40
30 34.1
20
10 14%
0 Ukuran Butiran (mm)
0.001 0.01 0.1 1
10
Clay Lanau (Silt ) Pasir (Sand ) Kerikil(Gravel )
Persentase Butiran Menurut Sistem AASTHO
Jenis Tanah % Gravel 0 Sand 65.9 Silt 20.1 Clay 14
Total 100
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SOAL 12 Diket: Uji hydrometer
GS = 2.70 T = 22° C L = 11.9 cm t. = 30 menit
Ditanya : Diameter ukuran butir terkecil Jawab: Berdasarkan Tabel 1.7 (hal 20) didapat nilai K = 0.01199
D = K L = 0.01199 11.9 = 0.001887 mm
t 30
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