Tunnel Quality Assurance and Quality Control Engineer

Tunnel Shift Engineer - QA/QC

. Quality Planning & Documentation

• Implement the Project Quality Plan, ITPs (Inspection & Test Plans), Method Statements, and Checklists specific to tunnel construction.
• Ensure all tunneling activities comply with project specifications, drawings, codes (IS, BS, ACI, EN), and client/consultant requirements.
• Maintain up-to-date revision control for all quality documents.

2. TBM Tunnel Construction Quality Control

(Applicable for shield/EPB/TBM tunneling projects)

• Inspect and verify:
  • TBM assembly & daily pre?launch checks
  • Cutterhead tools, disc cutters, scrapers, brushes
  • Main drive torque, pressure levels, and system parameters
  • Slurry/EPB conditioning materials and their dosing
  • TBM advance sequence, thrust forces, and ring build parameters
• Monitor segment installation, grout injection, and annular gap filling quality.
• Ensure correct segment type, orientation, gasket condition, and bolt torquing.
• Check for segment damage, joint opening, spalling, honeycombing, or misalignment.

3. Precast Segment Quality Control

• Inspect segment delivery, handling, and storage at the tunnel portal/launching shaft.
• Check segment dimensions, surface finish, gasket alignment, lifting points, and embedded items.
• Verify segment traceability (batch number, production date, ring ID).

(If you want, I can also share detailed segment?specific QC checklists.)

4. Material Testing & Verification

• Conduct/monitor routine testing:
  • Concrete slump & compressive strength
  • Shotcrete rebound, thickness, core tests
  • Grout pressure, density, viscosity
  • Rock bolt pull-out tests
• Ensure all materials have valid MTCs, approvals, and compliance certificates.

5. Tunnel Survey & Alignment Quality

• Verify excavation profiles using total station/laser scanning.
• Check TBM guidance system readings and ring alignment.
• Confirm tunnel geometry within tolerance (convergence, clearance, grade, alignment).

6. Non-Conformance & Corrective Actions (NCR/CAR)

• Identify, report, and record any Non-Conformance Reports (NCRs).
• Coordinate with construction teams to implement corrective actions.
• Verify rectification works and close NCRs with proper documentation.

7. Documentation & Reporting

• Prepare:
  • Daily QA/QC reports
  • Checklists and inspection reports
  • Test reports
  • Tunnel segment installation records
  • Grouting logs & as-built documentation
• Maintain systematic filing for audits and client verification.

8. Safety & Compliance

• Ensure compliance with tunnel safety standards (confined space, ventilation, gas detection).
• Verify certification of lifting equipment used for precast segments.
• Support HSE team in incident investigation involving quality issues.

9. Coordination & Communication

• Interface with:
  • Client/consultant QA/QC teams
  • TBM manufacturer representatives
  • Survey, material testing lab, and construction teams
• Attend quality meetings and represent QA/QC department.