The soil dynamic triaxial test system is primarily used for strength testing of axial pressure and lateral pressure in fine-grained soils, rocks, sand, and magma, as well as for soil dynamics testing. It can also be employed to measure the total shear strength parameters, effective shear strength parameters, and damping of fine-grained soils and sand.

By using 3 to 4 cylindrical specimens under different confining pressures (i.e., minor principal stress σ?), dynamic axial pressure (i.e., principal stress difference (σ? - σ?)) is applied to shear the specimens until failure, determining the soil's shear strength. Subsequently, based on the Mohr-Coulomb theory, the shear strength parameters—both total and effective—for fine-grained soils and sand are obtained.

Main Technical Specifications:

1. Maximum Axial Excitation Load:

(1) Axial Excitation Dynamic Load: ±20kN

(2) Axial Excitation Static Load: 0–20kN

(3) Static Load Relative Error: Better than ±0.5%

(4) Dynamic Load Indication Fluctuation:

a. Average Load Fluctuation: Better than ±0.5%

Load Amplitude Fluctuation: Better than ±2%

2. Axial Static Deformation Control: 0.01mm/min–5mm/min

(1) Deformation Relative Error: Better than ±0.5%

(2) Deformation Range: ±20mm

(3) Strain Measurement Capability: Up to 10??

3. Axial Exciter Stroke: ±50mm

4. Displacement Relative Error: Better than ±1% at 50mm

5. Triaxial Pressure Chamber Pressure: 0–1MPa

6. Specimen Dimensions: φ39.1×80mm, φ50×100mm