How Road Tunnels Are Made

How Road Tunnels Are Made

Today Sochi is a place where a lot of construction projects are being realized before the winter Olympics in 2014. Here we are going to see how they are building road tunnels in the city applying new technologies.

How Road Tunnels Are Made

They use a drilling rig for horizontal drilling. Then they insert the fiberglass pipes into the drilled holes.

The new technology is used for the first time in Russia. It is already widely applied in Europe. Such method of construction allows to produce works in soft soil in a more effective way. They strengthen the soil with a shield made from the pipes which helps to minimize the risk of slide and makes the work in the tunnel safer.

How Road Tunnels Are Made

Then they are pumping cement into the pipes to form a special protective shield that will let making the tunnel heading at the full section.

How Road Tunnels Are Made

The loader is here to load the soil on the dumper that will take it away.

How Road Tunnels Are Made

They use a hydrohammer for the work.

How Road Tunnels Are Made

How Road Tunnels Are Made

Then they start mounting the rough lining. They mount a steel arch first that is grouted by the special machine.

How Road Tunnels Are Made

How Road Tunnels Are Made

Then they have to provide the tunnel waterproofing to mount such frames from both sides. Only then the tunnel is ready for concreting.

How Road Tunnels Are Made

The concreting is made with concrete pumps and the solution is delivered from plants.

How Road Tunnels Are Made

When the concrete is solid enough they start to remove the formwork. Then they lay rails for carriages.

How Road Tunnels Are Made

When the waterproof works are over they start mounting of the reinforcing cage. They keep working 24/7.

The rampant was specilly made for the trucks.

How Road Tunnels Are Made

Then they can start concreting.

How Road Tunnels Are Made

How Road Tunnels Are Made

The pump provides concrete supply.

When the concrete becomes solid the inventory formwork is dismantled and moves further to repeat the whole cycle again.

How Road Tunnels Are Made

Everything must be smooth. This is a tunnel which is located next to that one on the photos above.

How Road Tunnels Are Made

And these are some photos from the tunnels being built nearby. They are applying another technology there.

How Road Tunnels Are Made

They use special combined machines here. With such a technology they cannot develop the tunnel for the full section and the work is not so safe as it was described above.

The rough lining is made in several stages.

How Road Tunnels Are Made

They are concreting the space at the arch.

How Road Tunnels Are Made

Here’s a tunnel combined machine.

How Road Tunnels Are Made

This is how stross development looks like.

How Road Tunnels Are Made

How Road Tunnels Are Made

It’s the tunnel combined machine.

How Road Tunnels Are Made

How Road Tunnels Are Made

They use dumpers for removing the soil too.

How Road Tunnels Are Made

How Road Tunnels Are Made

How Road Tunnels Are Made

The machine needs to be fuelled.

How Road Tunnels Are Made

The work in the tunnels is in full swing.

How Road Tunnels Are Made

How Road Tunnels Are Made

This excavator does not look friendly. It resembles a huge foot of some dinosaur…

Location: Sochi

via fish-ka-spb

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