Concrete pieces from Ari BTS station in Bangkok fall on road below

By The Thaiger

 

PHOTO: Isara Ariyachaipanich

 

Concrete panelling has fallen from the Ari skytrain station. Luckily there was no one injured.

 

Isara Ariyachaipanich posted photos on his Facebook page showing a huge slab of concrete laying on the road beneath the structure of the Ari BTS station. The concrete fell onto Phayon Yothin Road, near a local bus station.

 

“It was so good it didn’t hit anyone. Bus driver moved it to the side of the road. If it had hit a car or a motorcycle, there would be a dead person.”

 

Isara said he has messaged BTS officials through their Facebook page, but the operators have not responded or issued a statement about the incident. Isara posted the photos at about 7am Wednesday. The post has been shared more than 3,600 times and accumulated 2,100 comments.

 

Source: https://thethaiger.com/hot-news/transport/concrete-pieces-from-ari-bts-station-in-bangkok-fall-on-road-below

 

-- © Copyright The Thaiger 2019-07-10

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11 minutes ago, snoop1130 said:

If it had hit a car or a motorcycle, there would be a dead person

You can say that again .. Is this part of the air pollution issue or another haz' to add to the list .. 

Thais aren't great at maintenance from my experience - because it costs money with no appreciable benefit. Better to wait until it breaks and then fix it. 

1 hour ago, snoop1130 said:

Concrete panelling has fallen from the Ari skytrain station.

It´s called maintenance! Yes, right! The one thing you missed.

Concrete is a bit of a science, not just mix the parts and use it.

Some problems arise if beach sand is used ( salty ). Initially it helps to speed setting time a bit and strangely increase compressive strength but has an adverse effect on re-bar in the concrete. As the re-bar corrodes it expands and starts to crack the concrete around it sometimes causing bits of the concrete to fall off.

Not saying that's what happened here though. Could be many other reasons.

whenever I see a city in a film with a dystopian future I always think of Bangkok.

   

15 minutes ago, NCC1701A said:

whenever I see a city in a film with a dystopian future I always think of Bangkok.

   

The drinking water is laced with 'soma' maybe?

Not to worry, the honour is saved....as the defective structure was surely built by some awful farang firm....

What happened to the traditional explanation blaming someone or something else?

Here's a hint: It's caused by rain, sun, wind, humidity, or moonshine. In short, why not blame mother nature in general?

53 minutes ago, Lupatria said:

What happened to the traditional explanation blaming someone or something else?

Here's a hint: It's caused by rain, sun, wind, humidity, or moonshine. In short, why not blame mother nature in general?

Good grief no!!!

You don't understand. It was ok yesterday so it will be all right tomorrow.

Must admit too much moonshine during the construction can have an effect.

Not the first time one of those panels have fallen down.

 

Always wondered about the design how they have secured those thin concrete panels with bolts on each corner of the thin panel to the metallic frame and with the degradation of the concrete over time.

 

These side panels are mostly over traffic lanes and pedestrians and it's only a matter of time until someone is seriously hurt.

14 hours ago, Justgrazing said:

Is this part of the air pollution issue

Particulate matter must have been too concentrated in this area and spontaneously crystallized into a heavy piece of concrete mid-air

15 hours ago, snoop1130 said:

Isara said he has messaged BTS officials through their Facebook page, but the operators have not responded

 

 

standard operating procedure even if message is written in thai

Just the usual build it and forget it mentality.. Thailand has a love affair with concrete which unfortunately has a shelf life. That's fine for homes, knock-em down & rebuild... 

Larger infrastructure is another issue, especially if it's overhead, such as roads, bridges or railways!

if it killed anyone, how much would they pay out ?   nothing ? 30k ?

14 hours ago, overherebc said:

Concrete is a bit of a science, not just mix the parts and use it.

Some problems arise if beach sand is used ( salty ). Initially it helps to speed setting time a bit and strangely increase compressive strength but has an adverse effect on re-bar in the concrete. As the re-bar corrodes it expands and starts to crack the concrete around it sometimes causing bits of the concrete to fall off.

Not saying that's what happened here though. Could be many other reasons

Yep especially if the concreted mix has inadequate additives which are added to stop reo corrosion as part of the suite of additives added for r other reasons e.g. curing speed.

The thickness of that flake looks way too thin to me and points to what your offering up.

If the reo is too close to the surface of the concrete it will corrode yes, expand and flake off.

If concrete is poured in a sequence and too slowly into the formwork layering can occur this too can lead to flaking, using another batch of concrete one on top of the other and it’s not consistent in mixes this too will cause layering and weakness and can flake.

in super hot conditions if the formwork gets really hot the first part of a pour into it will dry too rapidly this affects strength too.

bloody dangerous !

20 minutes ago, Tropposurfer said:

Yep especially if the concreted mix has inadequate additives which are added to stop reo corrosion as part of the suite of additives added for r other reasons e.g. curing speed.

The thickness of that flake looks way too thin to me and points to what your offering up.

If the reo is too close to the surface of the concrete it will corrode yes, expand and flake off.

If concrete is poured in a sequence and too slowly into the formwork layering can occur this too can lead to flaking, using another batch of concrete one on top of the other and it’s not consistent in mixes this too will cause layering and weakness and can flake.

in super hot conditions if the formwork gets really hot the first part of a pour into it will dry too rapidly this affects strength too.

bloody dangerous !

I've only just enlarged the photo and I'm not sure what the chunk is.

Could be one of the side panels similar to ones they use on overpass road sections etc or a kind of 'finishing panel that was stuck on the outside of a pillar ( unlikely I admit ).

Really need a photo of where it came from to be sure.

Re' salt I believe 'fly ash' in the correct % helps to fix the salt problem.

5 hours ago, Lupatria said:

What happened to the traditional explanation blaming someone or something else?

Here's a hint: It's caused by rain, sun, wind, humidity, or moonshine. In short, why not blame mother nature in general?

Or maybe the brakes failed?

6 hours ago, userabcd said:

Not the first time one of those panels have fallen down.

 

Always wondered about the design how they have secured those thin concrete panels with bolts on each corner of the thin panel to the metallic frame and with the degradation of the concrete over time.

 

These side panels are mostly over traffic lanes and pedestrians and it's only a matter of time until someone is seriously hurt.

Don't tell me there isn't any monitoring of the production of the concrete for these panels.?

I ( seriously ) used to get up at 5am to go to a plant where the sand, cement and aggregate quantities were measured, noted and signed off, by me, prior to mixing. Any additives as well. Post mix samples were formed in bolt together formers and sent to the lab for testing.

Hold on, just remembered it was in UK. ????????

Karma comes in many forms. Lucky some driver had the correct amulet this time.????

I wonder how many people are aware that on flyovers/overpasses those kind of 'stick them on the edge' panels are not designed as crash barriers but are merely noise reduction panels.

If all the concrete panels are attached with raw carbon steel bars like the below, surely more will come crashing down in the years to come.