Video: Assembling small concrete blocks to form a tunnel

In the video below you will see the scene of people building a tunnel in a very simple way, without using any binder , just assembling the precast concrete pieces together already can form an extremely sturdy tunnel, enough for a whole car to run up there unharmed.

Just assemble the pieces of concrete together without adhesive.

As can be seen in the video, in a pre-excavated hole, a truck with a special back-loading bin will be put in, on a circular trunk there are many small wheels to support the tunnel blocks and shape it. Next, people will arrange small blocks of prefabricated concrete, gradually forming a tunnel wall and then filling up the truck body to create a tunnel ceiling. The soil will be continuously poured into 2 sides of the tunnel.

Finally, the car will run out, the excavator will run up on the roar to compress it all together and the tunnel section is complete. And from the beginning to the end we do n't see any kind of adhesive . Pretty simple. In the introduction of Youtube Lock Block, where this video is posted, this tunnel construction technique can be applied in the renovation of mines, construction of tunnels from above, .