Manager / Engineer - Instrumentation (Tunnel)

Larsen & Toubro; Tamil Nadu; On-site; INR 600,000 - 1,200,000; Part time

Job summary

Larsen & Toubro in Chennai invites a specialist to lead instrumentation planning, installation, calibration and data acquisition for TBM/NATM tunneling projects.

You will coordinate with design and geotechnical teams, prepare method statements, supervise instrument installation, validate data, and deliver regular monitoring reports, ensuring safety in urban tunneling.

Qualifications

• Experience with TBM, NATM, or cut-and-cover tunneling monitoring.
• Prepare installation procedures and QA/QC documentation.
• Calibrate and commission sensors and data loggers.
• Daily/weekly/monthly monitoring as per instrument type.
• Ensure safety compliance in urban tunneling.
• Interpret data and alert when thresholds exceeded.

Responsibilities

• Plan instrumentation and coordinate with design team.
• Review specs and monitoring plans.
• Determine instrument type, location, quantity.
• Coordinate with design and geotechnical teams to finalize monitoring layouts.
• Prepare method statements and quality checklists.
• Supervise installation of geotechnical instruments.
• Calibrate and commission sensors and data loggers.
• Manage data acquisition systems.
• Generate daily/weekly/monthly reports.
• Support ground control decisions and TBM adjustments.
• Ensure safety requirements compliance.
• Participate in risk assessments.

Skills

Instrumentation planning

Monitoring design

Data analysis

QA/QC standards

Data logging systems

Field supervision

Risk assessment

Communication

Tools

ADS/DAS

Data loggers

Calibration equipment

Geotechnical instruments

Job description

2. Installation, Calibration & Commissioning

3. Monitoring & Data Acquisition

4. Data Analysis & Reporting

5. Safety & Risk Management

• 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.
• 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.
• 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.
• 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.
• Ensure instrumentation systems comply with safety requirements, especially in urban tunneling.
• Participate in risk assessments and identify early warning indicators of potential ground failure.