Geotechnical monitoring is an issue of significant importance in any major geotechnical project. Information coming from geotechnical monitoring often plays an important role not only in every stage of the construction s but also at the service stage.
Objectives of monitoring
In general, the main objectives of geotechnical monitoring can be summarized as follows:
- To increase safety
- To confirm the design condition and improve it by back-analysis
- To reduce cost by taking appropriate corrective measures
- To manage legal concerns
- To follow the long-term behavior
Geotechnical monitoring systems
Depending on the application and objectives, different monitoring systems can be used in geotechnical problems. The table below provides a general guide for monitoring needs and corresponding monitoring devices.
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Main parameter
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Application
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Monitoring device
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Lateral deformation
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- Stability assessment of slopes and embankments
- Follow the deformation around the deep excavation and high slope excavation
- Identify the necessity of corrective measures
- Verify the safety of geostructures during construction and service time
- Back-analysis and determine the need for design improvement
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» Inclinometer
» Rod extensometer
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Vertical deformation
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- Evaluate the soil consolidation
- Follow the settelement around excavations
- Follow and adjust the final stage of embankment
- Identify the necessity of corrective measures
- Verify the safety of geostructures during construction and service time
- Back-analysis and determine the need for design improvement
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» Settlement cells
» Settlement points
» Rod Extensometer
» Horizontal inclinometer
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Pore water pressure
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- Slope stability evaluation
- Uplift and lateral water pressure evaluation
- Monitoring the efficiency of drainage system
- Determine the rate of embankment fill
- Seepage evaluation in dams and hydraulic structres
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» Standpipe Piezometer
» Pneumatic Piezometer
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