Chennai Metro Completes Tunnel From Light House To Thirumayilai

13 Feb 2026 CW Team

The tunnelling advance will permit the next stage of work to proceed, including track laying, electrical and signalling installations, and station finishing activities. Teams will prioritise installation of permanent linings, drainage arrangements and utility relocations to prepare the corridor for systems integration. Construction authorities will also coordinate with municipal agencies to manage surface restoration and ancillary works around station areas. Safety and quality assurance processes will remain in place as installers take over from excavation crews.

The completed link between Light House and Thirumayilai forms a contiguous stretch that enhances the continuity of the underground alignment in central Chennai. Planners expect the connection to facilitate smoother progression of the broader phase II programme and to reduce programme risks associated with separate isolated worksites. The tunnelling achievement contributes to the overall objective of expanding mass rapid transit capacity in the city.

CMRL noted that the milestone will be followed by rigorous technical inspections, systems commissioning and trial operations ahead of passenger services. Authorities will conduct integrated tests of signalling, communications and power systems and will engage independent auditors for safety certification. The agency indicated that continued liaison with civic stakeholders will be essential to ensure timely completion of remaining works and to minimise disruption during the final stages of delivery.

Chennai Metro Rail Limited (CMRL) has completed the tunnelling between Light House and Thirumayilai as part of the phase II project. The completion of this geological excavation marks a key civil engineering milestone for the expansion and signifies the end of the major underground construction activity on this segment. The work concluded after coordinated site operations, temporary support installations and planned desupporting. Project managers indicated that the structural integrity of the bore was confirmed through routine inspections and monitoring. The tunnelling advance will permit the next stage of work to proceed, including track laying, electrical and signalling installations, and station finishing activities. Teams will prioritise installation of permanent linings, drainage arrangements and utility relocations to prepare the corridor for systems integration. Construction authorities will also coordinate with municipal agencies to manage surface restoration and ancillary works around station areas. Safety and quality assurance processes will remain in place as installers take over from excavation crews. The completed link between Light House and Thirumayilai forms a contiguous stretch that enhances the continuity of the underground alignment in central Chennai. Planners expect the connection to facilitate smoother progression of the broader phase II programme and to reduce programme risks associated with separate isolated worksites. The tunnelling achievement contributes to the overall objective of expanding mass rapid transit capacity in the city. CMRL noted that the milestone will be followed by rigorous technical inspections, systems commissioning and trial operations ahead of passenger services. Authorities will conduct integrated tests of signalling, communications and power systems and will engage independent auditors for safety certification. The agency indicated that continued liaison with civic stakeholders will be essential to ensure timely completion of remaining works and to minimise disruption during the final stages of delivery.

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