Wille Geotechnik - Rock Combined Triaxial & Direct Shear Apparatus

The device is suitable for cylindrical, prismatic or irregular shaped pieces of solid or discontinuous rock cores. The system uses two independent servo-hydraulic actuators to apply axial and shear load to samples with highest accuracy possible.This device allows for the testing of rock samples under both shear and triaxial loading conditions.

This combination lowers the total cost of the system compared to purchasing two separate devices—one for triaxial tests and the other for direct shear tests.There is no limit for modularity of this system.

• Highly stiff and robust loading frame with a large testing area
• Precise force transducers to measure and control shear and normal stress
• Hydraulic power packs with high-quality noise protection, as well as emergency functions
• The shear boxes consist of a tilting free lower and upper shear frame, which is guided by linear bearings, a fixed upper shear frame and a guided load piston
• The triaxial cell is designed for sample sizes up to 100mm in diameter with confining pressure range up to 200MPa and temperature control up to +200 c degree.
• High-speed, closed-loop control of load, displacement, position and volume or flow
• Possibility to apply different stress paths or strain rates load independent shear rates (shear stress optional) via a micro-processor controlled high-quality servo-valve
• Suitable for precise direct shear and triaxial tests on rocks, sliding surfaces and building materials

• Load type : servo-hydraulic
• Axial force : up to 5000 kN
• Shear force : Up to 500 kN
• Specimen Size : 
• up to 300×300×300 mm for shear tests
• Up to 100mm diameter for Triaxial tests
• Accuracy  : 0.1%
• Settlement, resolution : 50/0.001 mm
• Shear displacement : 50 mm/100 mm
• Cyclic Load : on request

The combined triaxial/direct shear device is a modular, user-friendly system that can be upgraded with additional hardware to perform a variety of tests, including:

• Triaxial Cell: For standard triaxial testing on rock samples.
• Permeability Tests: Conduct permeability testing on rock samples using single or double pressure intensifiers, up to 200 MPa, in both steady-state or unsteady-state conditions.
• Ultrasonic Velocity Measurement: To measure the velocity of ultrasonic waves through the rock sample.
• Acoustic Emission Test (3D): For monitoring and analyzing the acoustic emissions from the rock during testing.
• Hydraulic Fracturing Test: To perform hydraulic fracturing on intact specimens.
• Creep Test: For assessing the long-term parameters of rock samples under constant load, useful for analyzing the stability of structures such as underground constructions.

GEOsys Software for user defined free programmable test standard procedures and complex test sequences by structured Windows operation on a graphic user interface.

Through a series of menus, this provides quick access to all the controls needed for test set ups and follows standard test sequences.

The software is able to create an unlimited number of test stages with interactive and calculated parameters for closed-loop, real-time control. An unlimited number of control and measuring channels can be simultaneously controlled