Rock Direct Shear Apparatus

The electric stress-controlled direct shear apparatus for rock is developed according to the national industry standards (SL264-2001) "Testing Code for Rock in Water Conservancy and Hydroelectric Engineering" and (JTG E41-2005) "Testing Code for Rock in Highway Engineering." This apparatus uses the direct push method and is mainly suitable for direct shear tests on rock specimens, structural surfaces (such as joints, bedding planes, foliation planes, cleavage planes, etc.), and contact surfaces between concrete (or mortar) and rock (bonding surfaces), as well as shear strength tests on bonding surfaces between concrete and other materials. Its structural performance fully meets the requirements of the testing specifications.

2. Main Technical Parameters:

1. Normal load P: 0–500 kN

2. Normal working stroke S: 0~150mm

3. Lateral load Q: 0~500 kN

4. Horizontal working stroke S: 0~150mm

5. Normal space: ≤450mm (maximum sample height: 200mm)

6. Horizontal space: ≤400mm (maximum sample width that can be placed: 200mm)

7. The cutting cylinder and push rod are adjustable up and down (easy to adjust according to sample height, enabling quick testing)

8. Both the normal and tangential force sensors are high-precision spoke sensors. (Direct force measurement is more direct and accurate than using pressure sensors.)

9. Displacement sensors in both normal and tangential directions; one digital display directly shows two displacements, two deformations, two forces, and two loading speeds.

10. The digital display meter is highly integrated and equipped with a micro printer.

11. Shear load speed V: 0~30 kN/s (manually adjustable stepless speed control)

12. Load indication method: LCD digital display

13. Load indication accuracy: 0.1 kN

14. Displacement measurement: Direct reading by photoelectric encoder (0.01 mm).

15. Loading method: electro-hydraulic. The hydraulic pump is an imported ultra-low noise pump.

16. Load control method: Manual stepless speed regulation. Equipped with a special device for voltage stabilization.

17. Motor power: 0.75 kW

18. Operating voltage: 380V/220V

19. Machine weight: 1300 kg

20. Ball discharge type.

21. Dimensions: 1100x850x1980mm

3. Direct shear box dimensions:

Select any three sets according to user requirements

4. Configuration List:

1. Main unit 1 set

2. Photoelectric encoders 2 sets (integrated with main unit)

3. Direct shear box 3 sets

4. LCD digital display meter 1 set (mounted on the main unit)

5. 1 micro printer (integrated within the digital display instrument)