Saturday, January 26, 2013

Respect the manholes.


At least while crossing the streets of Rio de Janiero. Diss them and they will blow up on you.
Since 2010, manhole explosions here have shattered windows, flattened cars and injured passers-by. An explosion in 2012 killed a worker at Rio’s port. While the rate of explosions has slowed, the city was rattled yet again in December after a manhole erupted behind the Copacabana Palace, the neo-Classical-style gem that is arguably Rio’s most luxurious hotel. A motorcyclist narrowly escaped the recent blast, filming with his cellphone his motorcycle going up in flames.

Such explosions are not unique to Rio. Indeed, engineering experts say few large cities are immune. Gas from any number of sources can collect underground. Electrical cables, often running in the same pipes, can fray with age, producing a spark that can set off an explosion, shooting up fire and flinging hundred-pound cast-iron manhole covers high into the air.

But Moacyr Duarte, a senior researcher on the city’s infrastructure at the Federal University of Rio de Janeiro, said dozens of explosions here, which often occurred in densely-populated areas, had “clearly gone beyond what it is statistically reasonable,” before recently declining.

The explosions have set Cariocas, as the residents of this traditionally relaxed city are known, on edge, and the blasts point to the broader problem of dilapidated infrastructure even as Rio emerges from a long economic decline.
Nobody pays attention to what is underground until, C.H.U.D.-like. it comes to the surface.

Comments:
New Orleans had a big problem with this when the Formosan termites came in and started munching in the insulation of the underground wires, which on the oldest wires was made of paper. This was one of the few things Katrina did for New Orleans -- the vast majority of the termites drowned (!).
 

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