The triaxial shear test is considered a comprehensive method for determining the shear strength of soil. Compared to the direct shear test, the triaxial shear test offers the following advantages: 1. It allows control over the drainage conditions of the specimen during the test; 2. It enables measurement of pore water stress during the consolidation and drainage processes of the specimen; 3. The stress distribution within the specimen is uniform.

Xi'an LETRY specializes in manufacturing the 1500kN large-scale standard static triaxial electro-hydraulic servo testing machine. This machine features vertical loading capacity and can perform static tests on cylindrical specimens made of soil, sand, and gravel according to specifications using a triaxial pressure chamber to study their static mechanical properties.

I. Main Specifications and Parameters:

1. Specimen Dimensions (Outer Diameter × Height): ?300 × 600mm;

2. Maximum Axial Static Output: 1500kN;

3. Maximum Lateral Pressure: 4MPa;

4. Maximum Axial Stroke: 200mm;

5. Maximum Back Pressure: 1MPa;

6. Maximum Confining Pressure and Pore Pressure: 4MPa;

7. Volume Change Range: 0–5000mL, Resolution 10mL;

8. Measurement Accuracy: Both force and displacement are 0.5%, Resolution 0.1%;

9. Automatic Pressure Application and Release, Automatic Collection of Test Parameters: Axial Force, Axial Displacement, Deformation (Strain), Confining Pressure, Pore Pressure, Volume Change, etc.;

10. Software Description: Refer to the Software Manual;

11. Hydraulic Power Source: Flow Rate 15L/min, Pressure 21MPa, Power 7.5kW.

II. Installation and Maintenance

This machine operates normally under the following conditions:

a. Within an ambient temperature range of 0°C to 35°C;

b. Indoor relative humidity not exceeding 85% RH;

c. The main unit is installed on a foundation (refer to the foundation diagram), with the testing machine base tray level at 0.1/1000, and the vertical column and axial hydraulic cylinder verticality at 0.1/1000;

d. Power supply voltage fluctuation not exceeding ±10% of the rated voltage;

e. In an environment free from vibrations, strong electromagnetic fields, and away from noise.