The T-12 Adit Tunnel, a critical railway infrastructure project executed under extreme geological and hydrological challenges to ensure safe connectivity in the Northeast.
The adit tunnel having total Length of 1400 meters with excavated diameter of 8.5 meter constructed at Imphal.
The adit tunnel was constructed in the challenging geology with saturated media. The presence of water media can cause problems in the excavation.
The stability of the tunnel is affected by several types of discontinuities (joints, faults, and shear zones).
The heavy water ingress was mainly observed from Chainage 1080 to 1440m. Similarly, water ingress towards the upstream portion of the Main Railway Tunnel for a considerable 100 meter stretch from the tunnel adit T junction due to weathered strata also observed.
The geological research available on the site revealed few faults and discontinuities existing in the area.
The water ingress is visible at the crown part of the tunnel through the tunnel linings. The continuous and massive water inflow causes high risk for the tunnel lining.
Challenging geology having discontinuities and fault.
Continuous water inflow ready to flood the tunnel.
Grouting execution under heavy water inflow.
The 1.4 km T-12 adit tunnel in Imphal faced severe water ingress and structural risks due to saturated media, faults, and discontinuities in the rock mass. Continuous inflow from multiple zones, including the crown, posed a high risk to tunnel lining integrity. Advanced grouting techniques, water control measures, and precision engineering were deployed under constrained conditions to stabilize the tunnel and ensure safe progress in one of India’s most challenging terrains.
Tunneling Support
Our tunnel grouting is not just a fix for leaks; it's a complete engineering solution for structural integrity. We use high-precision injection techniques and custom-formulated grouts to fill voids, stabilize ground, and create a permanent, watertight seal around your tunnel. This is about more than simple repair, it's about ensuring the long-term safety, durability, and performance of your critical underground infrastructure.
Read moreTunneling Support
Water is the number one enemy of infrastructure. Our water ingress control solutions are not temporary patches; they are permanent engineering fixes. We diagnose the source of water intrusion with surgical precision, then deploy custom-formulated grouts and resins to create a final, impenetrable barrier. This is about more than just stopping a leak, it’s about ensuring the long-term integrity, safety, and longevity of your structure.
Read moreLet’s create something meaningful together.