Unsaturated Residual Ring Shear Equipment
Systems
SRS-150 Residual Ring Shear Testing System for Soils


The GCTS SRS-150 Residual Ring Shear Testing System is excellent for determining the drained residual strength of continually sheared soils. This ring shear device was developed to provide extremely accurate results with ease.

 

  • Harmonic Drive™ motor technology for zero-backlash computer controlled continuous rotational speed range from 0.001 to 360 degrees per minute (°/min)
  • 300 N-m continuous torque capacity
  • 10 kN normal load capacity
  • 1000 kPa maximum normal stress
  • 1300 kPa maximum shear stress
  • Compact design, loading frame and motor fit inside the rolling cart for easier specimen preparation
  • Accepts 6 in (150mm) OD 4 in (100mm) ID annular specimens (98 cm2 effective sample area)

The GCTS Residual Ring Shear (SRS-150) is a fully automatic electro-pneumatic and servo-controlled testing system used for determination of drained residual strength of continually sheared soils. The SRS-150 ring shear device was developed using the Harmonic Drive™ motor technology for true continuous shearing rate without inherent backlash found in gear assemblies of other ring shear apparatus. The Harmonic Drive™ shearing actuator allows for large range of shearing rates at very high resolutions with large torque capacity. The SRS-150 is capable of applying shearing rates ranging from 0.001 to 360 degrees per minute continuously with zero-backlash for replication of true in-situ strain rates during failure.

 

The SRS-150 is capable of performing “multi-stage” tests where a sample is consolidated at a given pressure, sheared to its residual strength, consolidated to a new pressure and sheared again. This procedure allows for determination of the failure envelope using a single specimen. The device accepts 150 mm OD 100 mm ID samples for testing granular materials. The system components are conveniently placed inside the rolling cart for convenience, mobility and ease of specimen preparation.

 

OPTIONS

The SRS-150 can be upgraded for unsaturated soil testing.
This upgrade includes a SWC pressure panel (pictured above) and platens with High Air Entry Value (HAEV) stones which are easily replaceable and interchangeable with different air entry value rated stones.

The system can also be upgraded with optional bender element transducers.

  • 10 kN axial load capacity
  • 300 N-m continuous torque capacity
  • 150 mm maximum outside diameter
  • 1500 kPa confining pressure capacity

 

Please contact GCTS for full specifications.