DMRC DC-09 refers to a major underground tunneling package for the Delhi Metro Phase 4’s Golden Line (Aerocity-Tughlakabad), with IGNOU being one of the key new stations in this package (DC-09), which also includes Chhattarpur, Chhattarpur Mandir, and Neb Sarai, connecting areas in South Delhi and featuring deep tunnels and advanced Tunnel Boring Machines (TBMs) reaching significant milestones in early 2025 for faster progress.
Larsen And Toubro
About Project
Project Cost - $3.3 Bn
Product - Re-injectable Grouting Tube
New Delhi
Challenges
The DMRC DC09 IGNOU underground metro tunnel in New Delhi, spanning 6.51 km, faced challenges of water ingress and seepage at tunnel and station joints under high groundwater conditions. Maintaining long-term tunnel integrity, ensuring leak-proof construction, and supporting the safe operation of the Golden Line required a flexible solution capable of addressing both immediate and future joint sealing needs.
Our Solutions
Re-injectable Grouting Tubes provided a reliable and adaptable solution for sealing joints, controlling seepage, and maintaining water-tight conditions throughout the tunnel and IGNOU station. The system allowed for post-construction grouting, ensuring continued performance under variable hydrostatic pressures. This enabled Larsen & Toubro to deliver a durable, safe, and low-maintenance underground metro tunnel for DMRC, supporting operational reliability and structural integrity along the 6.51 km stretch.