Rock Combined Triaxial and Direct Shear Apparatus
The combined modular rock direct shear and triaxial test system is designed to determine the shear strength of intact, joint rock or concrete samples.The frame is a high stiff frame which consists of 4 stiff columns and two actuators for vertical force and shear force, combined in a special configuration to avoid friction and torque to determine the shear strength and creep properties of rock samples, concrete, as well as any solid material.
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.
- Features
- Specifications
- Software
- Standards
- Applications
- 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 |
Or customized on request
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
- ASTM D-5607
- ASTM D-7012-14
- ASTM D-7070-08
- JGS 2521-2009
- JGS 2531-2009
- JGS 2532-2009
- JGS 2533-2009
- JGS 2534-2009
- JGS 2541-2008
Standard Test Method for Performing Laboratory Direct Shear Strength Tests of Rock Specimens Under Constant Normal Force
Standard Test Methods for Compressive Strength and Elastic Moduli of Intact Rock Core Specimens under Varying States of Stress and Temperatures
Standard Test Methods for Creep of Rock Core Under Constant Stress and Temperature
Method for Unconfined Compression Test on Rocks
Method for Unconsolidated-Undrained Triaxial Compression Test on Rocks
Method for Consolidated-Undrained Triaxial Compression Test on Soft Rocks
Method for Consolidated-Undrained Triaxial Compression Test on Soft Rocks with Pore Water Pressure Measurements
Method for Consolidated-Drained Triaxial Compression Test on Rocks
Method for direct Shear Test on a Rock Discontinuity
- Land sliding
- Slope stability
- Deep excavations
- Buried structures
- Seismic investigations
- Embankment, dams and other earth structures
- Deep foundation on offshore and onshore
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