Instrumentation Planning & Design Coordination
Review project specifications, geotechnical baseline reports, instrumentation drawings, and monitoring plans.
Identify the type, location, and quantity of instruments required for TBM, NATM, or cut?and?cover tunneling.
Coordinate with design and geotechnical teams to finalize monitoring layouts and trigger levels.
Prepare method statements, installation procedures, and quality control checklists.
Installation, Calibration & Commissioning
Supervise and ensure proper installation of geotechnical instruments such as
Inclinometers
Piezometers (standpipe, VW, pneumatic)
Settlement markers
Extensometers
Convergence monitoring targets
Load cells & strain gauges
Tilt meters & crack meters
Seismic and vibration monitors
Conduct calibration, testing, and commissioning of all sensors and data loggers.
Ensure instruments are installed as per QA/QC standards and relevant project specifications.
Monitoring & Data Acquisition
Manage automatic and manual data acquisition systems (ADS/DAS).




Perform daily/weekly/monthly monitoring as per the instrument type.
Ensure continuous data flow from remote monitoring systems and address communication failures.
Maintain logs of ground movements, settlement, vibration levels, groundwater fluctuations, and structural loads.
Validate and clean raw data before submission.
Data Analysis & Reporting
Analyze monitoring data to detect abnormal trends or threshold exceedance.
Inform project managers, geotechnical engineers, and construction teams when trigger limits are crossed.
Prepare daily, weekly, and monthly instrumentation monitoring reports.
Support decision-making in ground control, NATM support class modification, and TBM operational adjustments.
Safety & Risk Management
Ensure instrumentation systems comply with safety requirements, especially in urban tunneling.
Participate in risk assessments and identify early warning indicators of potential ground failure.

📌 Manager / Engineer Instrumentation Tunnel Tamil Nadu
🏢 LT-Larsen & Toubro
📍 Tamil Nadu