How Could This Train Tunnel Take 23 Years To Finnish? The Hallandsås Tunnel, Sweden
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Hallandsås Rail Tunnel
In 1975, the West Coast line in Sweden was having a lot of problems due to increasing traffic. Work began on expanding the rail system so that more train cars could travel safely along it.
The Hallandsås railway upgrade is one of the most important parts of this project. It, along with the new Halmstad- linking road are supposed to make life easier for commuters travelling between Gothenburg & Copenhagen. the coming of trains that could cross the strait with both directions helped initiate the construction of Hallandsås Tunnel in 1992 with plans to open 3 years later. However, problems started almost immediately.
Groundwater started seeping from the rock as soon as construction began, and in greater volumes than expected. The rock was too soft to allow for drilling equipment or even the first drill they tried to use. However, the original drillers led to more water leaks. These issues bankrupted the company and caused them to hand the project off. It has been reported that poisonous sealing compound was used during construction without any safety precautions taken. This led to livestock and fish in the area dying, as well as workers on the project getting sick.
The company faced criminal charges for these issues and construction was halted again in 1997. Up to that point, only about 3km of the 8km tunnel had been drilled. Eight years later, construction began once more.
The construction of Hallandsås Tunnel was completed in 2015 - 23 years after the project was initiated. New drilling practices and machines meant this part of the work went faster than before, but bedrock quality slowed things down in certain areas. The Swedish government predicted that the project would cost about $1 billion, yet by the time it was finished, the total cost was far from what was originally projected - it ended up being closer to $10.5 billion. Which is ten times the budget.
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Credit:
TimelyTrains:
https://www.youtube.com/watch?v=vIhay4jk3F0&ab_channel=TimelyTrains
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#Construction #Megaproject #Engineering
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