Rock Shear Box Apparatus
The Rock Shear Box Apparatus is designed for determining the shear strength characteristics of rock specimens, especially along discontinuities such as joints, bedding planes, and fault lines. It enables engineers to select samples from exposed rock faces or boreholes, analyze structural orientations, and simulate real shear conditions in a controlled environment.
The apparatus features a diagonally split shear box. The upper section applies vertical compressive load through a hydraulic ram, while the lower section applies reversible horizontal shear force via two hydraulic rams. All loads are applied using hand-operated hydraulic pumps, ensuring precise and stable control.
Application
This equipment is widely used in:
(1) Geotechnical engineering testing
(2) Rock mechanics research
(3) Slope stability analysis
(4) Mining engineering
(5) Civil engineering and foundation design
(6) Laboratory simulation of rock shear behavior
Standards
ISRM Suggested Methods for Rock Shear Testing
ASTM D5607 (Direct Shear Test on Rock Specimens)
ASTM D5731 (Indirect Tensile Strength – reference for rock preparation)
GB/T 50266 (Engineering Rock Mass Test Methods Standard)
Technical Parameters
| Item | Specification |
|---|---|
| Shear Box Dimensions | 160 × 150 × 200 mm (L × W × H) |
| Load Application | Hydraulic, via two single-speed hand pumps |
| Maximum Pressure | 40 MPa |
| Horizontal Displacement | Dial gauge, 10 mm travel × 0.01 mm accuracy |
| Package Dimensions | 480 × 730 × 250 mm (L × W × H) |
| Total Weight | 80 kg |
Features
(1) Diagonally split shear box for realistic shear testing
(2) Vertical and horizontal hydraulic loading system
(3) Reversible shear force application
(4) Accurate displacement measurement with dial gauge
(5) Manual hydraulic control for precise load adjustment
(6) Robust and durable structure for heavy-duty testing
(7) Suitable for discontinuity and fault analysis
Working Principle
The rock specimen is placed inside the shear box along the desired discontinuity plane. A vertical load is applied to simulate normal stress conditions, while horizontal shear force is applied to induce failure along the plane. Displacement and applied force are measured to determine shear strength parameters.
FAQ
1. What is this product?
It is a testing apparatus used to measure the shear strength of rock samples.
2. What is this product used for?
It is used for analyzing rock stability and structural behavior in engineering projects.
3. What is the working principle of this product?
It applies controlled vertical and horizontal loads to simulate shear failure along rock discontinuities.
4. Why is this product important?
It helps engineers assess rock stability and design safe structures.
5. What industries is this product suitable for?
It is suitable for geotechnical engineering, mining, and civil construction industries.
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