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Old June 5th, 2011, 02:43 PM   #1781
Surel
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Again a road collapse under possibly overweight truck. I wonder are there statistics on such things? E.g. comparison, EU, USA, China, etc...

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http://dyxwsyb.blog.163.com/blog/sta...1143184249906/



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Old June 5th, 2011, 02:58 PM   #1782
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Google translate says the weight limit for this particular bridges was 15 tonnes. That seems extremely low for a multi-lane highway, but it looks like the truck was loaded with steel, hence the total weight was likely above 40 tonnes.
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Old June 5th, 2011, 06:06 PM   #1783
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Quote:
Originally Posted by ChrisZwolle View Post
Google translate says the weight limit for this particular bridges was 15 tonnes. That seems extremely low for a multi-lane highway, but it looks like the truck was loaded with steel, hence the total weight was likely above 40 tonnes.
There's not a lot of rebar in that concrete, either.



And I don't know when the last 'under traffic' bridge collapse was in the USA, likely when the I-35W Mississippi River bridge in Minneapolis failed a few years ago. Weak bridges are usually closed by authorities before that happens.

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Old June 5th, 2011, 06:18 PM   #1784
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not just 40 tons. total weight of the truck is 88.92 tons. It carried 73 tons of steel. In such cases, bridge/road quality and design are meaningless.

overloading is a cancer. remember the collapse of the ramp in February? We'll be seeing such collapses if overloading is not stopped, no matter how they improve the road quality.
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Old June 5th, 2011, 06:20 PM   #1785
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How old was that bridge? 15 tonnes doesn't sound like anything that would be built these days.
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Old June 5th, 2011, 06:20 PM   #1786
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Quote:
Originally Posted by oliver999 View Post
amazing highquality viedo ! crazy driver show you around shanghai at midnight:
http://v.youku.com/v_show/id_XMjM1NjM0MzEy.html
http://v.youku.com/v_show/id_XMjM2MTM1ODY4.html
this is badass. the view is great.
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Old June 5th, 2011, 06:22 PM   #1787
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How old was that bridge? 15 tonnes doesn't sound like anything that would be built these days.
built in 1989, and expanded in 1995. design limit is 20 tons and 15 ton is the actual limit.
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Old June 5th, 2011, 06:41 PM   #1788
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built in 1989, and expanded in 1995. design limit is 20 tons and 15 ton is the actual limit.
That may explain why the limit was so low. I guess things back then were very different from now.
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Old June 5th, 2011, 09:26 PM   #1789
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Quote:
Originally Posted by fragel View Post
not just 40 tons. total weight of the truck is 88.92 tons. It carried 73 tons of steel. In such cases, bridge/road quality and design are meaningless.

overloading is a cancer. remember the collapse of the ramp in February? We'll be seeing such collapses if overloading is not stopped, no matter how they improve the road quality.
There was no rebar on that bridge either , it seems China's shortcuts are catching up with it....
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Old June 6th, 2011, 12:04 PM   #1790
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There was no rebar on that bridge either , it seems China's shortcuts are catching up with it....
I'm fairly certain construction methods and materials have improved since 1989

However you are right, many earlier infrastructure projects like this one will probably need rebuilt in the next 20 years.
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Old June 7th, 2011, 11:41 AM   #1791
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I'm fairly certain construction methods and materials have improved since 1989

However you are right, many earlier infrastructure projects like this one will probably need rebuilt in the next 20 years.
Things have changed a lot in the 22 years since 1989.

Back then, China literally literally didn't have any trucks over 20tonnes, and no private cars either.
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Old June 7th, 2011, 08:15 PM   #1792
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Quote:
Originally Posted by mgk920 View Post
There's not a lot of rebar in that concrete, either.



And I don't know when the last 'under traffic' bridge collapse was in the USA, likely when the I-35W Mississippi River bridge in Minneapolis failed a few years ago. Weak bridges are usually closed by authorities before that happens.

Mike
There aren't a lot of rebar probably because it's only designed to hold 15t of load. Also the fact that it was built in 1989 so bridge construction technology was not as advanced. However I don't believe people were as greedy and corrupt back then so shady constrcution practice was actually not as common as today. In this case, the bridge actually held for 22 years, and god knows how many overloaded trucks have passed over it, so it probably has exceeded its designed lifespan long time ago. Compare to some construction today I'd say it did surprisingly well.

Also measuring bridge strength by looking for rebars along is inadquate, in a lot of Chinese constructions the problem the root cause is shady contractors stretch the rebar before use to get the extra length while weakening it. It's something that visual inspection cannot detect, only can be done by crack open the girder.
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Old June 7th, 2011, 08:48 PM   #1793
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Quote:
Originally Posted by oliver999 View Post
amazing highquality viedo ! crazy driver show you around shanghai at midnight:
http://v.youku.com/v_show/id_XMjM1NjM0MzEy.html
http://v.youku.com/v_show/id_XMjM2MTM1ODY4.html
Those videos are amazing, Thanks!
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Old June 25th, 2011, 10:53 AM   #1794
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Yeah I've seen videos of the driving done in China they may have really impressive roads, but no way would I dare driving in that country. People cross the center line at will, completely ignoring traffic light, etc
Many European countries, like Italy, the traffic is way more chaotic.
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Old June 25th, 2011, 11:05 AM   #1795
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Quote:
Originally Posted by maldini View Post
Many European countries, like Italy, the traffic is way more chaotic.
Italy is getting a little better now, as they combat speeding and dangerous driving. France used to be chaotic, but strict regulations enforcement turned France in to an old age pensioners paradise...
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Old June 25th, 2011, 06:55 PM   #1796
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Quote:
Originally Posted by hmmwv View Post
There aren't a lot of rebar probably because it's only designed to hold 15t of load. Also the fact that it was built in 1989 so bridge construction technology was not as advanced. However I don't believe people were as greedy and corrupt back then so shady constrcution practice was actually not as common as today. In this case, the bridge actually held for 22 years, and god knows how many overloaded trucks have passed over it, so it probably has exceeded its designed lifespan long time ago. Compare to some construction today I'd say it did surprisingly well.

Also measuring bridge strength by looking for rebars along is inadquate, in a lot of Chinese constructions the problem the root cause is shady contractors stretch the rebar before use to get the extra length while weakening it. It's something that visual inspection cannot detect, only can be done by crack open the girder.
I see the Chinese Govt. didn't waste any time removing the pics.

There's LOADS of short cutting that goes on in this country thanks to the endemic corruption at all levels. The sad fact is, is that there's no way to independently confirm what, if anything, is being done to combat it, given that there is only State Media, which is fully controlled by the Govt.

Rather than build a completely new structure between the two bridges (which was done in Burnaby and Vancouver, Canada during construction of the HOV lanes for example), then adding a deck to join the pre-existing bridges, they just did the deck part.
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Old June 30th, 2011, 03:45 PM   #1797
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The world's longest cross-sea bridge spanning Jiaozhou Bay of Qingdao City, Shandong Province, opened on Thursday.

The opening ceremony of the 36.48-km eight-lane Qingdao Jiaozhou Bay Bridge was held Thursday morning.

The bridge, connecting the urban district of the city to its Huangdao district, cost 14.8 billion yuan (2.3 billion U.S. dollars). Construction of the bridge began in May 2007.

The bridge will shorten the route between the two centers by 30 km, cutting travel time down from over 40 minutes to around 20 minutes, said Han Shouxin, deputy director of the city's traffic management committee.

Previously, the longest cross-sea bridge in the world was the 36-km-long Hangzhou Bay Cross-sea Bridge that connects the cities of Jiaxing and Ningbo in east China's Zhejiang Province.






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Old June 30th, 2011, 04:19 PM   #1798
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I see the Chinese Govt. didn't waste any time removing the pics.

there is only State Media, which is fully controlled by the Govt.
that's far far far way from truth.
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Old July 17th, 2011, 10:19 PM   #1799
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China Tibet's first expressway ready for use.

China Tibet's first express highway — the Lhasa-Gongga airport-exclusive expressway — will be officially open to traffic in the coming days.

The construction of the Lhasa-Gongga airport-exclusive highway was officially launched on April 2009. Investments in the highway totaled more than 1.5 billion yuan.

The highway will curtail the time spent from downtown Lhasa to the Gongga airport from one hour to half an hour. There would be no tolls on the highway.

By People's Daily Online

http://english.peopledaily.com.cn/90...2/7441838.html


Now if someone could find some pictures of the expressway and post it here, it would be greatly appreciated.
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Old July 17th, 2011, 10:31 PM   #1800
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From: http://en.tibet328.cn/01/05/201106/t945776.htm
Author of the photos unknown
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