Soil Strain Type Direct Shear Instrument
This precision instrument is designed for determining the shear strength parameters of soil samples according to established geotechnical engineering standards.
Instrument Purpose
The Soil Strain Type Direct Shear Instrument measures the shear strength of soil by testing four samples under different vertical pressures. Each sample undergoes horizontal force application until shear failure occurs, enabling calculation of soil strength parameters—angle of internal friction and cohesion—based on Coulomb's law.
Compliant Standards: T0140-1993, T0141-1993, T0142-1993, T0143-1993, T0176-2007 of JTG E40-2007
Technical Specifications
- Sample area: 30 cm²
- Sample height: 20 mm
- Lever ratio: 1:20
- Maximum horizontal load: 1.2 kN
- Vertical graded loading: 50, 100, 200, 300, 400 kPa
Physical Dimensions & Weight
Portable Instrument: Net weight 40 kg (including weights), Dimensions 430 * 270 * 700 mm
Manual Instrument: Net weight 55 kg (including weights), Dimensions 630 * 350 * 1050 mm
Vertical Pressure Loading Sequence
| Number |
Load Weight (kg) |
Quantity (cumulative) |
Pressure Value (kPa) |
| 1 |
0.765 (Hanging plate) |
1 |
50 |
| 2 |
0.765 |
1 |
100 |
| 3 |
1.53 |
1 |
200 |
| 4 |
1.53 |
1 |
300 |
| 5 |
1.53 |
1 |
400 |
Product Images