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[narrator] As the top half is dug out, the exposed rock is covered
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Engineering Catastrophes

As the top half is dug out, the exposed rock is covered with a thin layer of high...

[narrator] As the top half is dug out, the exposed rock is covered with a thin layer of high performance concrete, shot from a hose at high velocity, aptly named shotcrete. The thin layer of shotcrete quickly compacts, and holds the earth in plac as it settles. With this technique, engineers
expect the ground to settle,
or deform a little

Full Transcript

00:00:01.000 --> 00:00:04.998
[narrator] As the top half is dug out, the exposed rock is covered
00:00:05.000 --> 00:00:07.718
with a thin layer of high performance concrete,
00:00:07.072 --> 00:00:13.518
shot from a hose at high velocity, aptly named shotcrete.
00:00:13.056 --> 00:00:16.999
The thin layer of shotcrete quickly compacts,
00:00:16.998 --> 00:00:18.998
and holds the earth in plac as it settles.
00:00:20.048 --> 00:00:24.118
With this technique, engineers expect the ground to settle, or deform a little.
Duration
25 seconds
Views
13
Timestamp in Movie
00:25:39
Uploaded
Oct 28, 2025
Season
6
Episode
3
Genres
documentary
Production
Moviecoop

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Movie Summary

With access to all phases of design and a large cast of experts, some of the great failures of engineering history are uncovered.
S06 • E07 And today, like in many countries, - Engineering Catastrophes 00:09
And today, like in many countries,
S06 • E08 Like this disaster in Canada - Engineering Catastrophes 00:12
Like this disaster in Canada
S06 • E10 You can have lots of things in New York - Engineering Catastrophes 00:07
You can have lots of things in New York
S06 • E07 {\an8}Timber is one of the oldest construction materials, - Engineering Catastrophes 00:08
{\an8}Timber is one of the oldest construction materials,
S06 • E04 Monday morning, August 5, 1974, - Engineering Catastrophes 00:17
Monday morning, August 5, 1974,
S06 • E05 And with tower cranes that means being firmly fixed to the ground. - Engineering Catastrophes 00:06
And with tower cranes that means being firmly fixed to the g...
S06 • E09 This dam was vital for the future, - Engineering Catastrophes 00:11
This dam was vital for the future,
S06 • E01 [narrator] This masterpiece of modern architecture - Engineering Catastrophes 00:27
[narrator] This masterpiece of modern architecture
S06 • E08 [narrator] A hidden weakness that gave workers a sinking feeling. - Engineering Catastrophes 00:13
[narrator] A hidden weakness that gave workers a sinking fee...
S06 • E05 And sometimes, to the building they're working on too. - Engineering Catastrophes 00:10
And sometimes, to the building they're working on too.
S06 • E07 When treated, it can be stronger than steel. - Engineering Catastrophes 00:06
When treated, it can be stronger than steel.
S06 • E02 [narrator] By the 20th century, - Engineering Catastrophes 00:15
[narrator] By the 20th century,
S06 • E07 NARRATOR: But it's more than just strength -- in a shaky, - Engineering Catastrophes 00:12
NARRATOR: But it's more than just strength -- in a shak...
S06 • E10 [narrator] And the better the view, the higher the price tag. - Engineering Catastrophes 00:12
[narrator] And the better the view, the higher the price tag...
S06 • E03 And when it stops, the tunnel is stable, - Engineering Catastrophes 00:07
And when it stops, the tunnel is stable,
S06 • E09 NARRATOR: The vast earthworks took just a year to complete, - Engineering Catastrophes 00:12
NARRATOR: The vast earthworks took just a year to complete,
S06 • E04 The agents were on the west side of the building, - Engineering Catastrophes 00:07
The agents were on the west side of the building,
S06 • E08 [narrator] Leaving engineers fighting against Mother Nature. - Engineering Catastrophes 00:08
[narrator] Leaving engineers fighting against Mother Nature.
S06 • E05 At the city center, a new development was underway. - Engineering Catastrophes 00:15
At the city center, a new development was underway.
S06 • E07 Here, this success means wood isn't just used for houses. - Engineering Catastrophes 00:06
Here, this success means wood isn't just used for house...