FINALLY, LIGHT AT THE END OF TUNNEL LEAKAGE WOES

By: cjprincemedia

Suggestions for a report from the Central Mining Research Institute (MRC), an independent advisory body designated by the central railway, if executed could possibly end the longstanding problem of leakage in the tunnel Parsik Thane. RMC recommends chemical jointoisage as a solution to stop leakage in one of Asia’s oldest tunnels.

The report, a copy with Mumbai Mirror, also highlighted two additional measures like cleaning surface drainage solution and removing all structures above the tunnel.

Built in 1873 and inaugurated in 1916, the 1.3 km tunnel which is on the main line of Mumbai-Kalyan between Kalwa and Mumbra Station faced groundwater infiltration. For hundreds of thousands of passengers traveling on the central suburban railway line in Mumbai every year during the monsoon, from the tunnel, they had to go through a waterfall.

Travelers traveling in this fast line are accustomed to seeing hills sprout water and on the roofs of the trains. During rainfall, the Parsik hill water flows down and enters the tunnel. This also causes flooding in both channels, resulting not only in late train services but also damage to the railroad signaling system, according to the report.

The report suggests to address the problem of infiltration through both surface and grout measurements in the tunnel.

According to the central lane, there are 109 unauthorized cabins in the tunnel and 575 cabins in the rest of the area which represent a danger to the tunnel structure. Sewage ponds flow into the runways or seep into the tunnel.

In June last year, part of a 34-meter containment wall built by railroads to prevent slums from invading the runways had collapsed to disrupt rail services. After the landslide, the TMC issued eviction notices in shanty towns. People had approached the HC who held the eviction order and asked the civic body Thane to first develop a rehabilitation program for the inhabitants of the huts.

Failing to develop a rehabilitation plan for slums or solving the problem of escape, CR RMC appointed in April, and who submitted their report last week. In its JIRC report he suggested, “Smooth the chemically infiltrating area inside the tunnel and using non-toxic peaks that do not enter the tunnel.”

Since the 100 year structure is a major tunnel for rail traffic on local and long-distance trains, the report recommends the use of a limited time period of 3 hours per day for treatment. In addition, the tunnel is old and lined with bricks, geophysical tests and water pressure must be performed prior to commencing drilling operations for grouting to determine areas of holes in the structure, according to the respect.

The test should also be carried out at the end of the grouting operation to check whether the procedure works or not. The brick tunnel lining should also be monitored during the grouting operation to detect signs of suffering, the report reads.

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