New Chinese bridge lets motorists drive down middle of river

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Key words span of bridge reinforced concrete cracks repairing safety requirement

Key words

span of bridge
reinforced concrete
cracks
repairing
safety requirement
it collapsed
external aggressive environment
dismantling
to

pour sth
to accumulate=to build up=to pile up
quipment
anchor rods
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Purpose of building a bridge solution to the problem of running

Purpose of building a bridge
solution to the problem of running a

road through mountainous terrain.
to link the town of Gufuzhen in Xingshan county to the main highway running between Shanghai and Chengdu in south-western China.
to cut the journey to 20 minutes (the extension of bridge is 10,5 km)
to avoid the need to build tunnels along the route, to minimise the environmental impact of the road.
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The supposed problems Experts believe that the bridge can repeat the

The supposed problems

Experts believe that the bridge can repeat the experience

of the Bridge between San Francisco and Auckland, as it is in the water environment.
In 2007, during the reconstruction of the Bay Bridge connecting San Francisco and Auckland, cracks were found in the protective metal frame of the eastern span of the reinforced concrete sarcophagus.
Caltrans approved the contractor's plan to pour the crevices with industrial glue. But in 2014 it was discovered that the water continued to flow into the interior, causing corrosion and provoking the appearance of microcracks in the anchor rods. US FTA recommended installing equipment that will detect corrosion processes.
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Features of this problem and solution Typical damages can accumulate for

Features of this problem and solution

Typical damages can accumulate for several

years, but fatal destruction can happen instantly, which will lead to catastrophic consequences
The reinforced concrete sarcophagus with a wall thickness of 50 cm should ensure the stability of the structure in the event of an earthquake
This design solution was to protect the metallic elements from the action of salty sea water, which causes corrosion