Motor-Driven Dynamic Triaxial System HC-MDT

System Description

The Dynamic Triaxial Test System is a cutting-edge geotechnical testing instrument integrating multi-stress path loading and high-frequency vibration, specially developed to reveal the hydro-mechanical multi-field coupling mechanism of soils under complex conditions.

Breaking through the limitations of conventional triaxial testing technology, the system integrates three core technologies: dynamic servo loading (up to 5 Hz high-frequency vibration) and coordinated control of multi-phase pressures (confining pressure / back pressure / pore water pressure), enabling full-process simulation for advanced research such as dynamic modulus and damping ratio characterization of soils and dynamic liquefaction analysis.

The system is equipped with an advanced full-surface deformation digital image measurement system. Adopting non-contact measurement technology, it can accurately capture the full-field strain and the evolution of crack development of unsaturated soil specimens during testing.

Technical Specifications

• Specimen Size: φ39.1 / 50 / 61.8 mm

• Axial Static Loading: 10 / 20 / 30 / 40 / 50 kN, accuracy: 0.1% F.S.

• Axial Dynamic Loading: 0.1~5 Hz, waveforms: sine / square / triangle / user-defined

• Confining Pressure / Back Pressure / Pore Water Pressure: 1 / 2 / 3 / 4 / 6 MPa, accuracy: 0.25% F.S.

• The system integrates an advanced full-surface deformation digital image measurement system.

• Adopting non-contact measurement technology, it accurately captures full-field strain and crack development of unsaturated soil specimens during testing.

• Specimen Deformation Measurement: Full-surface 360° circumferential strain data of the specimen

• Image Accuracy: 10⁻⁴ ~ 10⁻⁵ × specimen height

• Axial Loading Rate: 0.001~50 mm/min, stepless speed regulation

• Confining Pressure / Back Pressure Loading Rate: 0.005~25 mm/min, stepless speed regulation

• Confining Pressure / Back Pressure Volume: ≥ 250 ml

• Maximum Flow Rate: ≥ 1000 mm³/s, accuracy: 0.25% F.S.

• Resolution: 0.1 ml

Note: All above parameters can be customized.

Product Functions

• Confining Pressure Dynamic Compensation: Automatically eliminates confining pressure fluctuations caused by axial vibration.

• Pressure Chamber: 304 stainless steel with internal lighting; observation window diameter ≥ 125 mm; automatic remote cloud data post-processing.

• Control Functions: Automatic control of loading ram displacement, loading rate, confining pressure, and chamber water filling/draining.

• Standard Saturated Soil Triaxial Tests: UU, CU and CD triaxial tests.

• Saturated Soil Stress Path Tests: Standard S-T, P-Q stress paths and user-defined stress paths.

• Saturated Soil K₀ Consolidation.

• Advanced Loading: Load control and low-frequency cyclic loading.

• Soil Dynamics Tests: Dynamic modulus & damping ratio measurement, dynamic liquefaction potential analysis, low-to-medium frequency cyclic load response tests, and custom dynamic stress path simulation.

• Post-Processing Software: Data import, validity check, error correction, outlier detection, deformation calculation, strain calculation, data export and curve plotting.

• Test Result Output: Full strain data output during testing; supports time-history curves, full-field spatial analysis and specimen morphology matching.

• Main Unit Power: Single-phase AC 220 V, peak power from 2 kW (depending on configuration).

• Main Unit Dimensions: 1200 × 600 × 1500 mm.

• Standard Accessories: Computer, monitor, keyboard, mouse and test tools

 Note: All functions can be customized.