Dehiwela Flyover Vibration

[Az]

Today, when I was driving along the Dehiwela flyover, a large bus was travelling on the opposite direction despite the sign which prohibits heavy vehicles from driving on the flyover. The flyover started vibrating, and it was a bit of a scary experience. Has anybody else experienced this? Is this normal? Is the construction of this flyover of poor quality? Could this collapse in the future?

[AbeysinghE]

  On 4/24/2011 at 8:51 AM, Az said:

Today, when I was driving along the Dehiwela flyover, a large bus was travelling on the opposite direction despite the sign which prohibits heavy vehicles from driving on the flyover. The flyover started vibrating, and it was a bit of a scary experience. Has anybody else experienced this? Is this normal? Is the construction of this flyover of poor quality? Could this collapse in the future?

The quality of those flyovers in SL is debatable.What i know is, there will be a degree of vibration in those bridges.But i'm 100% sure it's something which not felt by the drivers.If you felt it to the vehicle i'm sure there will be something. Dehiwala flyover completed way to early than it's normally expected,Those "Kadinam viyapruthi" quality is always a big ?????????????

[VVTi]

You guys have obviously not driven over some of the other bridges in Sri Lanka...

[AbeysinghE]

  On 4/24/2011 at 9:21 AM, VVTi said:

You guys have obviously not driven over some of the other bridges in Sri Lanka...

Mate.I think now most of the bridges are like "Sangili Paalama"

[luckey007]

If you ride a motor cycle over these bridges you will find how difficult it is as the road is not smooth and like "patched". Dematagoda flyover and ragama and gampaha ones are only in good shape for riders.

[MasterDon]

Thats normal I guess.Them Bridges stand on shock-absobers anyway...

You guys should feel the Kelaniya bridge(the one over the river,not the flyover) bouncing when the tyres sit on one of those pier beams underneath.Feels like a freakin' earthquake.

Edited April 24, 2011 by MasterDon

[SeanD]

I know the structure of the Nugegoda flyover was not approved by the local engineering teams from the Moratuwa campus. No idea about Dehiwala but I'm assuming it is not of hte highest standards. There is a difference between vibration of poor quality bridges in other parts of the country and a flyover where the top is over 50 feet up in the air. I'm sure they don't allow heavy vehicles on it for more than just blocking traffic. As with many other farcial "time savers" it could just be a matter of time before it all comes crashing down. Wouldn't want to be up there when it does.

[rover]

All these flyovers which were built recently are with steel structures. They are suppose to be flexible and thats why you feel a vibration when travelling over it, no need to be alarmed.

[rover]

  On 4/24/2011 at 8:51 AM, Az said:

Today, when I was driving along the Dehiwela flyover, a large bus was travelling on the opposite direction despite the sign which prohibits heavy vehicles from driving on the flyover. The flyover started vibrating, and it was a bit of a scary experience. Has anybody else experienced this? Is this normal? Is the construction of this flyover of poor quality? Could this collapse in the future?

No need to be alarmed. these are built with steel structures and suppose to be flexible,same like a structure of a ship, thats why you feel if as the bridge is shaking when you travel on it, and it's normal.

[The Stig]

  On 4/24/2011 at 9:21 AM, VVTi said:

You guys have obviously not driven over some of the other bridges in Sri Lanka...

Or parked under one (Damn that was stupid of me )

[CyRaX]

As far as i know the vibration is common im all the flyovers.there are shock absorbers underneath and over it is kind of a hard rubber layer.anywayz we all know about constructions in Sri lanka..

[ash]

First time I noticed that on the Dehiwala flyover when I had to stop on top of the bridge for a traffic. I actually was not sure whether there was something wrong with my car or an earthquake. It's really scary. I don't think the vibration of that bridge is normal at all.

[Mean Green z28]

Vibration is okay, just hope it doesn't reach it's resonant frequency while you're up there lol

[dreezone]

What fool on earth build a steel fly over meters next to the sea and salt water

[jdnet]

  On 4/27/2011 at 7:40 AM, dreezone said:

What fool on earth build a steel fly over meters next to the sea and salt water

You do know the hull of a ship is made out of steel right?

[Muditha420]

Nugegoda and dehiwala both same, both vibrates when vehicles go past...i dont find anythin to be not worried about damn thing feels like it will fall down soon....its just a freaking bridge that starts near a bus halt and ends near the next halt so yeah traffic flow is awsome

i like to see an ambulance go past on those rush our times when its full of cars

btw why do people call it rush hour when nothings moving

Edited April 27, 2011 by Muditha420

[X Terra]

  On 4/27/2011 at 7:40 AM, dreezone said:

What fool on earth build a steel fly over meters next to the sea and salt water

Then what happen to this bridge! Will it fall tomorrow?

My link

It’s not true that steel bridges are week and its outdated technology! (Look at the 2009 US steel bridge competition report through below link). If you design and built correctly, it will stand as long as concrete bridges, but need constant care and maintenance which is much expensive compare to concrete ones.

However, I personally don’t trust Access Engineering as they haven't got proven records in quality constructions and no need to comment on those government bodies who were the consultants/ designers on those projects.

My link

[Ayad Zubair]

"Sangili Paalama" is the correct word cos it was mentioned by one of the political person on a sinhala radio station recently so guys will call it "Sangili Paalama" not flyovers or bridges

[The Stig]

  On 4/27/2011 at 7:40 AM, dreezone said:

What fool on earth build a steel fly over meters next to the sea and salt water

Ever heard of Anodic/cathodic Protection ?

http://en.wikipedia.org/wiki/Cathodic_protection

Edited April 27, 2011 by The Stig