What Earthquake Intensity Is the Eurasia Tunnel Resistant to?

“Okay, but how?” Many studies lie behind the answer to the question. long-term research All kinds of dangers were taken into consideration during the studies, designs and construction phase. Of course, this includes earthquakes.

on the world A pinnacle in tunneling what is seen Eurasia Tunnel, How is it protected against earthquakes? Let’s look at some technical details.

Eurasia Tunnel is located 16 km away from the Northern Anatolian fault line.

The high seismic activity of the North Anatolian fault line brings all possibilities to mind. The route of the tunnel While it is chosen to not be exposed to earthquake risk, of course, this is not the only thing.

As there are many authorized units during the design phase, Kandilli Observatory and Earthquake Research Institute It is also available. In the studies carried out together, the fault system can produce biggest earthquake Designs are made based on

There are seismic bracelets in the world’s 6th largest tunnel.

at your deepest point 106.4 meters below sea level minimizing displacements in the Eurasia Tunnel to increase earthquake resistance. 2 seismic bracelets was placed.

The position of these bracelets, which can also be called gaskets, was chosen carefully. In the tunnel, the ground passes from soft to hard and from hard to soft. If the bracelets transition to soft layered ground such as sand located at points. In this way, the bracelets can move independently of each other and stress concentrations are not experienced without breaking.

The bracelets were produced after going through all the tests and proving their success. The displacement limits of these bracelets are ±50 mm for offset, ±75 mm for extension/shortening was determined as .

Their lifespan is determined by analysis and simulations made by the international certification body. at least 127 years The bracelets reported to be TBM (tunnel boring machine) considering the level of seismic activity and their size “first” in the tunneling industry It is accepted as.

Eurasia Tunnel is resistant to 7.25 moment earthquake.

In the design, which continued without compromising service and safety conditions, verification was also made with the “cutter head rotation torque” value. The tunnel is also constantly monitored with 12 accelerometers, 21 displacement sensors that monitor in three dimensions, and 3 accelerometers in the operating buildings. Observations against possible earthquakes Eurasia Tunnel is one of the safest structures in the world It is accepted as.

Eurasia Tunnel, which runs parallel to the fault line, will only feel the shaking of the earthquake. I wish we could use technologies such as the Eurasia Tunnel, which is stated to move with the ground and not shake on its own like buildings, above the ground, right?

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