How do you build a major bridge for a new HSR over an existing HSR

[cirr]

How do you build a major bridge for a new HSR over an existing HSR

without affecting the smooth operation of the latter?

You build the 15000 ton and 200m long bridge by and parallel to the existing tracks。When completed，you then rotate the monster bridge some degrees（21 in this case） to make seamless connection with the rest of the viaducts：

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This was an enginnering feast served early this morning over a section of the 2264km Shanghai-Kunming HSR that intersects the Beijing—Guangzhou HSR。

Way to go。

 

[cirr]

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[shuttler]

The 14.500 tons bridge section swung 27 degrees counterclockwise to align and splice perfectly with the other open ends. It took only 1/2 hour to complete

Amazing engineering achievement on precision, smart planning, efficiency and perfect execution.

Here watch video (CCYV 13) showing the turntable that the bridge sat on and made its turn.

http://www.guancha.cn

 

[Anonymous_CryptoSpy]

congratulations! do these construction works have private ventures?

 

[nufix]

Maybe this is "Sosrobahu construction tech", invented by an Indonesian Mr. Tjokorda, firstly implemented in 1980's. Sosrobahu is a technique to turn around a constructed object on top of a bridge pylon.

Sosrobahu is a road construction technique which allows long stretches of flyovers to be constructed above existing main roads with a minimum of disruption to the traffic. The technique was designed by Tjokorda Raka Sukawati and involves the construction of the horizontal supports for the highway beside the existing road, which is then lifted and turned 90 degrees angle before being placed on the top of the vertical supports to form the flyover pylons. This technique is of considerable value in increasing road mileage in large cities where there is a restricted space for new roads and where the closure of existing roads for the length of time to build a flyover using normal construction techniques would impose significant economic costs.

In November 1989, President Soeharto of Indonesia gave the name Sosrobahu to the new technology. The name was taken from a character in the Mahabharata, and derives from Old Javanese for thousand (sosro) shoulders (bahu).
Tjokorda's invention was used by US engineers in the construction of a bridge in Seattle. They placed the oil under a pressure of 78 kg/cm² (7.6 MPa) as per Tjokorda's original theories. Tjokorda himself wanted to investigate further the limits of his invention and built himself a laboratory where he successfully tested the LPBH to a limit of 78.05 kgf/cm² (7.654 MPa).
Patents have been granted for the invention from Indonesia, Japan, Malaysia, and the Philippines, and has been applied for in South Korea. The Indonesian patent was granted in 1995, while the Japanese patient was granted in 1992. The technology has been exported to the Philippines, Malaysia, Thailand and Singapore. The longest stretch of overpass built using this technique is in Metro Manila, Philippines at the Villamor/Bicutan link located at the southern part of the metropolis. In the Philippines, 298 supports have been erected, while in Kuala Lumpur, the figure is 135. When the technology was introduced to the Philippines, the President of the Philippines, Fidel Ramos commented: "This is an Indonesian invention, but is also an ASEAN invention".
A second version of the technology has been developed. Whereas the first version used a steel anchor inserted in a concrete base, the second version uses a single plate with a hole in the middle which is not only simpler, but also significantly speeds up the time it takes to erect a pylon from 2 days to 45 minutes. It is expected that the lifespan of flyovers constructed using the Sosrobahu method will be approximately 100 years.

According to Dr. Drajat Hoedajanto, an expert from the Bandung Institute of Technology, Sosrobahu is a very simple solution to the problem of erecting flyover pylons and is suitable for use in the construction of elevated toll roads which have traffic running underneath them. Sosrobahu is clearly a useful and versatile technology.

Sosrobahu - Wikipedia, the free encyclopedia

 

[shuttler]

Maybe this is "Sosrobahu construction tech", invented by an Indonesian Mr. Tjokorda, firstly implemented in 1980's. Sosrobahu is a technique to turn around a constructed object on top of a bridge pylon.

Probably not the same though the Sosrobahu is a great invention

The above technique undertaken involved the turning 90 degrees of the pier cap (480 tons each), not a main section of the overpass which weighs 14,500 tons

The Colorado River Bridge at Hoover Dam?Design Aspects with HPC

 

[StarCraft_ZT]

congratulations! do these construction works have private ventures?

Industry and Information Technology ministry of China has opened the access to railway, medical, telecom, energy, finance and municipal constructions for private sector. China should depend on a market-driven economy rather than government-authorization economy.

 

[Aegis DDG]

Industry and Information Technology ministry of China has opened the access to railway, medical, telecom, energy, finance and municipal constructions for private sector. China should depend on a market-driven economy rather than government-authorization economy.

No surprise there as you support Friedrich von Hayek radical free market economy . Nevertheless, In my opinion, when developing countries are industrializing, the government should set up specialized agencies and ministries that would help the construction of Highways, Expressways, Railway gauge tracks, local airports and national ports. Only when an economy matures should the private sectors take control of the infrastructure of the nation (under government standards)

 

[StarCraft_ZT]

No surprise there as you support Friedrich von Hayek radical free market economy . Nevertheless, In my opinion, when developing countries are industrializing, the government should set up specialized agencies and ministries that would help the construction of Highways, Expressways, Railway gauge tracks, local airports and national ports. Only when an economy matures should the private sectors take control of the infrastructure of the nation (under government standards)

Yes, in China, National Development and Reform Commission, a powerful department under State Council is responsible for approving and authorizing almost all kinds of projects including highway, HSR, natural gas, coal mines, airport, education.... We call it "small State Council"

Well ever since 1997, China has kept approving huge infrastructure projects. In my province, there are 100 counties, 100 million population, every county is connected by highway. Even the road connected with each valliage is well built under national standard. Very impressive indeed.

This is a pic of village road in a poor area of China.

Well no doubt that investment in infrastructure construction has driven our GDP growth, but it won't last long. Many of the roads or real estate are never used by people. Cost is huge, and little return are expected. I hope private sector could step in, because they care more about economic feasibility, so no money and resources will be wasted.