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Geotechnical Monitoring

Geotechnical monitoring is designed to measure soil behavior, manage subsurface risk, and deliver data-driven insight for every phase of construction project planning and execution.

Advanced Geotechnical Sensors

Ground movements caused by earthworks, deep foundations, tunneling, and other subsurface activities pose direct risks to public safety and asset structural performance. Geotechnical sensors installed across the site capture the precise, continuous data that project teams rely on to interpret soil behavior under changing site conditions, quantify geotechnical risks, and refine the design of underground structures throughout every construction phase.

When geotechnical sensors remain in place from the construction stage through long-term operation, engineers gain a continuous record of how embankments,excavations, retaining structures, and other critical assets respond to evolving site conditions. This continuous information is central to diagnosing soil failures, settlement, heave, or landslides, and to developing targeted remediation strategies that prevent further movement.

Deployed at the surface or below ground, these instruments provide the accurate, continuous measurements that support safe, efficient, and data-driven decision-making from initial excavation through the full operational life of a project.

What Geotechnical Sensors Measure

Geotechnical sensors record the soil and structural parameters that engineers need for accurate infrastructure performance analysis and informed decision-making:

  • Groundwater levels
  • Pore water pressure
  • Ground deformation (settlement, heave, lateral movement, slip)
  • Stress states within soil and foundations elements

This information allows project teams to:

  • Verify actual deformations against design assumptions
  • Optimize the sizing of underground structures
  • Manage geotechnical risks such as landslides or excessive settlement
  • Monitor long-term changes in soil behavior to support ongoing asset management and prioritize maintenance operations

Geotechnical Sensor Types for Deformation and Strain Instrumentation Projects

Borehole Extensometers

Borehole extensometers measure relative displacement between fixed anchor points with millimetric precision. Often deployed vertically, horizontally, or at an incline, they capture deformation data across a wide range of monitoring scenarios.

Borehole Settlement Gauges

A cost-effective instrument used to monitor and record larger-scale settlement patterns across embankments and fills.

Inclinometers

Inclinometers capture lateral ground deformation with millimetric precision along the full depth of a borehole. In vertical installations they track horizontal movement; in horizontal installations they record settlement profiles. Engineers use inclinometers embedded in soil or cast into structural elements such as diaphragm walls and piles.

Embankment Settlement Meters

Embankment settlement meters are purpose-built instruments that record vertical displacement across embankments and large earth structures.

Earth Pressure Cells

Earth pressure cells quantify stress and strain states in soil, delivering the load transfer and soil-structure interaction data

Water Level and Pore Water Pressure Monitoring

  • Piezometers

Piezometers are straightforward, cost-effective geotechnical sensors that measure groundwater levels and pore water pressure changes. Manual readings or automated dataloggers provide continuous monitoring data under varying site conditions.

Advanced Geotechnical Sensors from Sixense: Cyclops™ – Automated 3D Topographic Monitoring

The Cyclops automated measurement system delivers:

  • Real-time 3D movement monitoring for geotechnical projects.
  • Sub-millimetric accuracy
  • The ability to group theodolites in large unstable areas, improving stability and repeatability across complex work sites.

Find out more about Cyclops solution

4DBloc – GNSS‑Based Deformation Sensor

The 4DBloc sensor uses high-precision GNSS technology to deliver real-time monitoring of ground and structural movement across large project areas.

  • Accurate, continuous deformation tracking
  • Aggregated measurements that improve data resolution and reliability

Find out more about 4DBloc sensor

4DSkin – Synthetic Aperture Radar (SAR)

The 4DSkin synthetic aperture radar is a non-contact geotechnical sensor that monitors large areas – up to several kilometers – with sub-millimeter accuracy.

  • High-frequency measurements, typically every 2 minutes
  • Precision on the order of 0.2 mm
  • Suited to slopes, embankments, and large infrastructure assets

Find out more about 4DSkin sensor

4DShape – 3D Continuous Linear Inclinometer

The 4DShape system links a flexible chain of 3D inclinometers to measure deformation continuously along vertical, horizontal, or converging profiles.

  • Continuous 3D deformation data in real time
  • Applicable to both soil and structural monitoring

Find our more about 4DShape solution

Why Choose Sixense for Geotechnical Sensors and Monitoring

Proven Monitoring Expertise

Close to thirty years of in-house research, development, and real-time geotechnical monitoring innovation backed by hands-on data analysis from thousands of project sites worldwide.

Dedicated Local Teams

Field teams of technicians, engineers, project managers, and data specialists work on-site to deliver rapid deployment, expert guidance, and responsive support throughout each project phase.

Turnkey Service

From preliminary technical planning to long-term data management, our monitoring solutions address every project need across the full construction and operational lifecycle.

Culture of Innovation

Continuously developing geotechnical sensors and monitoring systems that make geotechnical risk assessment more accessible and address the practical challenges engineers face on complex projects.

Proactive Maintenance

Scheduled system inspections and rigorous data quality control deliver accurate, reliable, and uninterrupted monitoring over the full life of each installation.