Geotechnical Engineering Laboratory

1. Unsaturated Soil Tests

1.1 Triaxial stress path apparatus for unsaturated soils

- Stress path triaxial tests for saturated soils

- Stress path triaxial tests for unsaturated soils

- K₀ consolidation tests

- Creep tests

 

GDS model

Specimen dimensions: φ = 38 mm / h = 76 mm

Maximum axial load: 7 kN

Maximum cell pressure: 1.7 MPa

 

VJ model (double cell)

Specimen dimensions: φ = 50 mm / h = 100 mm

Maximum axial load: 5 kN

Maximum cell pressure: 1.7 MPa

Functions:

- Consolidation tests for unsaturated soils

- Soil water characteristic curve for unsaturated soils

 

Specimen dimensions: φ= 61.8 mm h = 20 mm

Maximum axial pressure: 2 MPa

Maximum suction: 500 kPa

 

2. Rockfill material tests

2.1 Large scale triaxial test apparatus

Functions:

- Triaxial tests

- Stress path tests
- Creep tests

Specimen dimensions: φ= 300 mm

h = 600mm

Maximum axial load: 1200 kN
Maximum cell pressure: 3 MPa

Maximum back pressure: 1 MPa

 

Creep test apparatus

 

Model YS-30

3. Dynamic and cyclic tests

3.1 Multi-purpose triaxial test apparatus

Functions:

- Stress path triaxial tests

- Dynamic triaxial tests

- Static and dynamic torsional tests

- Simulation of seismic waves

- Vertical and torsional coupled vibration tests

 

Solid cylinder:φ= 61.8 mm / h = 150 mm ,φ= 100 mm / h = 200 mm

Hollow cylinder: φ_int = 60 mm, φ_ext = 100 mm / h = 150 mm

Maximum axial load: 30 kN

Maximum torque: 50 N-m

Frequency of axial load: 0.01 – 5 Hz

Functions:

- Determination of shear modulus and damping ratio

 

Solid cylinder: φ = 50 mm / h = 100 mm, φ = 70 mm / h = 140 mm

Hollow cylinder φ_int = 30 mm, φ_ext = 70 mm / h=140 mm

Maximum axial load: 5 kN

Maximum cell pressure: 1000 kPa

Functions:

- Determination of dynamic strength, dynamic modulus and damping ratio

- Identification of soil liquefaction

Specimen dimensions: φ = 39.1 mm / h = 80 mm

Maximum axial force: 1 kN

Maximum cell pressure: 400 kPa

Frequency of axial load: 0.01 – 10 Hz