1. Instrumentation Planning & Design CoordinationReview 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.2. Installation, Calibration & CommissioningSupervise and ensure proper installation of geotechnical instruments such asInclinometersPiezometers (standpipe, VW, pneumatic)Settlement markersExtensometersConvergence monitoring targetsLoad cells & strain gaugesTilt meters & crack metersSeismic and vibration monitorsConduct calibration, testing, and commissioning of all sensors and data loggers.Ensure instruments are installed as per QA/QC standards and relevant project specifications.3.



Monitoring & Data AcquisitionManage 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.4. Data Analysis & ReportingAnalyze 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.5. Safety & Risk ManagementEnsure 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 - Geologist cum Instrumentation (Tunnel) (Chennai)
🏢 LT-Larsen & Toubro
📍 Chennai