Praktikum : Uji Geser Langsung (Direct Shear) Tanggal :

Lokasi : Laboratorium Mekanika Tanah Praktikan :

Disusun Oleh : Asisten Praktikum :

Jenis Sampel : Pasir Asisten Laporan : Khairul Umam

Diameter = 6.35 cm Loading = 1 mm/min = 0.01

Tinggi = 2 cm 0.01 mm/div = 0.656

Luas = 31.67 cm2 Volume = 63.338 cm3

Beban = 3.167 kg Beban = 6.334 kg = 12.668 kg

0.10 kg/cm2 0.20 kg/cm2 = 0.40 kg/cm2

Dial

Horizontal

Displacement

Horizontal DH

(mm)

Dial

Proving

Ring

Gaya

Geser

(kg)

Tegangan

Geser

(kg/cm2)

Dial

Horizontal

Displacement

Horizontal DH

(mm)

Dial

Proving

Ring

Gaya

Geser

(kg)

Tegangan

Geser

(kg/cm2)

Dial

Horizontal

Displacement

Horizontal DH

(mm)

Dial

Proving

Ring

Gaya

Geser

(kg)

Tegangan

Geser

(kg/cm2)

0 0.00 0.00 0.00 0.000 0 0.00 0.00 0.00 0.00 0 0.00 0.00 0.00 0.00

110 1.1 3.30 2.16 0.068 85 0.85 2.40 1.57 0.05 150 1.5 7.00 4.59 0.14

176 1.76 3.50 2.30 0.072 270 2.7 3.10 2.03 0.06 277 2.77 8.00 5.25 0.17

251 2.51 4.00 2.62 0.083 320 3.2 4.10 2.69 0.08 408 4.08 9.00 5.90 0.19

320 3.2 4.10 2.69 0.085 455 4.55 5.00 3.28 0.10 534 5.34 9.50 6.23 0.20

390 3.9 4.10 2.69 0.085 595 5.95 5.00 3.28 0.10 657 6.57 9.00 5.90 0.19

470 4.7 4.20 2.76 0.087 730 7.3 5.00 3.28 0.10 772 7.72 8.10 5.31 0.17

532 5.32 4.20 2.76 0.087 765 7.65 5.80 3.80 0.12

604 6.04 4.10 2.69 0.085 920 9.2 5.00 3.28 0.10

685 6.85 4.00 2.62 0.083 1057 10.57 4.20 2.76 0.09

760 7.6 3.90 2.56 0.081

Normal Geser Max

0 0

0.10 0.087

0.20 0.12

0.40 0.2

Shear Strength Result

Sudut Geser Dalam = 25.36 o

Kohesi = 0.0188 kg/cm2

Tegangan (kg/cm2)

Beban

Normal Stress

DIRECT SHEAR (ASTM D 3080)

Kalibrasi Dial Horizontal

Horizontal Ring = Kalibrasi Proving Ring

Normal Stress = Normal Stress =

0.000

0.020

0.040

0.060

0.080

0.100

0.120

0.140

0.160

0.180

0.200

0.220

0 2 4 6 8 10 12

Tega

nga

n G

ese

r (

kg/c

m2)

Displacement (mm)

Grafik

Tegangan Geser Vs Displacement

Series1

Series2

Series3

y = 0.474x + 0.0188

0

0.05

0.1

0.15

0.2

0.25

0 0.1 0.2 0.3 0.4 0.5

Tega

nga

n G

ese

r M

ax (

kg/c

m2)

Tegangan Geser Normal (kg/cm2)

Grafik

Tegangan Geser Max Vs Tegangan Geser Normal