The Parsik Tunnel Rehabilitation, a landmark railway tunnel restored with precision to combat severe water ingress and ensure uninterrupted operations on one of India’s busiest rail corridors.
The 1.3km long Parsik railway tunnel is one of the Oldest & busiest railway tunnels in India. After the completion of the tunnel, it became the third-largest tunnel in Asia & first railway tunnel in India in 1916. It also became a landmark project for the Indian Railways by being the 1st tunnel of about a mile in length constructed by Indian Railways, during the British period in India.
Water ingress into the tunnel
There was often heavy water seepage inside the tunnel. A section of approximately 75m inside the tunnel experienced severe seepage during the monsoon season. The water ingress continued till the months of December/January and then reducedto dripping at multiple places. The deterioration was age-related as well as due to heavy encroachment upon the hill where the tunnel has been dug. Due to continuous seepage the strength of the arc above the railway lines was deteriorating. Rust had begun to afflict the railway lines. The seepage would have led to a major disaster in the coming years.
The traffic of the trains cannot be stopped because it is one of the main lines. The work needed to be done despite the traffic.
Other highly challenging constraints were:
Working space constraint
Limited working hours
Consistent water ingress
Poor geology
High-voltage electric line going along
No ventilation duct available
Advanced waterproofing and structural rehabilitation techniques were deployed to address persistent water ingress and age-related deterioration in the 1.3 km Parsik Tunnel. Despite operational constraints such as continuous train traffic, limited working space, and poor geology, the project successfully reinforced the tunnel’s structural integrity. This meticulous approach not only safeguarded a century-old engineering marvel but also ensured the continuity of a critical railway link for millions of commuters.
Geotechnical Works
Ground Stabilization & Grouting is a critical geotechnical service aimed at improving soil and rock conditions to ensure safe, stable, and durable structures. This process involves injecting specialized grouts into the ground to fill voids, seal cracks, and increase load-bearing capacity. It is widely used in infrastructure, tunneling, foundations, and repair works where weak or unstable ground poses structural risks.
Read moreTunneling Support
Our tunnel retrofitting and rehabilitation solutions are not quick fixes; they are complete engineering overhauls designed to restore and future-proof aging infrastructure. We diagnose structural deficiencies and water ingress points with surgical precision, then deploy custom-formulated grouts and structural linings to permanently strengthen, waterproof, and extend the service life of your tunnel. This is about more than repair, it's about re-engineering for a new era of safety and performance.
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.
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