Overview
The 70mm diameter x 2m inclinometer tube is a standardized component in geotechnical instrumentation, engineered to facilitate precise measurement of horizontal ground displacement. It is typically installed vertically in boreholes to monitor slopes, embankments, and foundations for signs of instability. Constructed from robust materials like PVC or ABS, the tube features internal grooves that guide a inclinometer probe, ensuring consistent data collection. Its 70mm diameter strikes a balance between structural integrity and ease of installation, while the 2m length allows for modular assembly in deeper boreholes.
Structure and Working Principle
The tube consists of interlocking segments with precisely machined grooves running along the inner walls. These grooves align perfectly when segments are joined, creating a continuous pathway for the inclinometer probe. The probe measures tilt at incremental depths, detecting deviations from vertical alignment caused by ground movement. Each tube segment includes coupling mechanisms (e.g., threaded connections or snap-fit joints) to ensure stability during installation. The outer surface may have ribs or markings to improve bonding with grout or soil, preventing slippage that could compromise data accuracy.
Key Features
1. **Material Versatility**: PVC tubes dominate for most applications due to their resistance to chemical corrosion, while aluminum variants suit high-load environments. 2. **Dimensional Precision**: The 70mm internal diameter accommodates standard probes while maintaining rigidity. Groove angles are machined to ±0.5° tolerances to ensure probe alignment. 3. **Modular Design**: 2m segments allow customizable depths; coupling systems maintain axial alignment across joints. Some models include built-in filters to prevent debris ingress.
Application Areas
Primarily used in: - **Slope Stability Monitoring**: Early detection of landslides in highway cuts or open-pit mines. - **Retaining Wall Systems**: Verifying design assumptions and monitoring post-construction performance. Secondary applications include dam safety assessments and tunnel convergence studies. In urban areas, they help track excavation-induced movements near deep foundations. The tubes are often paired with automated data loggers for real-time monitoring in critical infrastructure projects.
Maintenance and Precautions
Regular verification scans (bi-monthly or after seismic events) are recommended to confirm tube integrity. Accumulated debris in grooves can distort readings—flushing with water may be necessary. During installation, ensure the tube is surrounded by uniform backfill (typically bentonite-cement grout) to minimize voids. Avoid sharp bends or impacts during handling, as deformation exceeding 1° per meter can render the tube unusable. Always cap exposed ends to prevent contamination.
B2B Procurement Guide
1. **Volume Discounts**: Suppliers often offer 10–15% price breaks for orders exceeding 500 meters. 2. **Certifications**: Request ISO 9001-compliant manufacturers; some projects require third-party test reports for groove tolerances. 3. **Lead Times**: Standard PVC tubes typically ship within 2 weeks, while custom aluminum variants may take 4–6 weeks. Confirm courier compatibility for international shipments—length may incur surcharges.
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