In order to create different Olympic Park Stadium, have participated in “ water cube ” construction of Zhejiang Southeast grid with 30,000 steel braided mega “ basket ”. It is understood that the steel strength than the engineering “ nest &rdquo, high, &ldquo of construction difficulty; water cube ”.
On April 28, Olympic Park Stadium steel structure part commenced. In extremely rare 350 tons of heavy crane in Daqing City, easily picked up more than 30 tons of steel frame, firmly placed on the provisional support for the more than 30 meters high.
400 construction team of people, from the national grid company of Southeast Zhejiang famous for. They have been involved in “ water cube ”, the CCTV building, construction of steel structure building of Beijing Capital International Airport.
Captain Xu Dongqing said: “ such a complex structure, coupled with the Daqing low winter temperatures, construction difficulty is greater than the water cube. &Amp;rdquo;
is the core of steel structure of the stadium is also the most difficult part. 30,000 root 7,000 tons, the ports vary steel, to be woven into “ basket ”, the error must be controlled within 3 mm.
in order to defend 3 mm cordon, workers in welding, not whatsoever, within the walls, that there was no wind interference. Furthermore, the method they use is “ gas shielded welding ”, thereby reducing errors, improving the accuracy of welding.
hundreds of pipe Group constitute a hoisting unit, a total of 168, each shape is different, weight ranged from more than 10 tonnes to 40 tonnes.
because is too heavy for mobile crane is required to complete at a time, after hanging up, the workers and welding at the altitude of about 50 meters, to control within the error of 3 mm, the difficulty!
in addition, using special steel for steel structure. This is because the ordinary steel expansion coefficient smaller, frost may be pulled. This steel, low temperature is not broken, suitable for use in severe cold area of Northeast China.
it is learned that this special steel is also used for the first time in the city, use very few in the Northeast. This steel is taller than General steel prices around $ 1000 per ton, strength is several levels higher, lingxia40sheshidu low-temperature resistance.
acting as “ nest ” g wide steel structure design consultants road, had to maintain a stadium design. He said that Daqing temperature lower than that of Beijing, so the use of steel, stronger than “ nest ” even higher, weaving the giant “ basket ” really very difficult.
Stadium chief engineer Wang Xingqian told reporters that the high altitude when assembling of steel structures, the following retention bracket needs to be done, wait for the entire steel structure construction is completed, to demolition. Also need to be calculated according to the mm the height of unloaded at a time.
Baiming on workers at the same time, also about 10 days to complete demolition.
