橋梁設(shè)計(jì)外文翻譯資料--超輕大跨度橋-橋梁設(shè)計(jì)-展示頁
2025-05-26 13:35本頁面
【正文】 ped. ****大學(xué)畢業(yè)設(shè)計(jì)（論文） 2 In order to address this, the contractor adopted a similar solution to that used on Raftsundet Bridge ?importing Stalite aggregate from South Carolina in the USA. Stalite is produced through thermal expansion of high quality slate, and results in a lightweight aggregate that gives concrete of very high strength at low unit weights. Its low absorption of approximately 6% and high particle strength are two of the factors that allow Stalite to achieve high strength concrete in excess of , the manufacturer says. The bondand patibility of the aggregate with cement paste reduce microcracking and enhance durability, and its low absorption makes it easy to mix and pump. According to AF Sundoybrua quality manager JanEirik Nilsskog, this material has given a very good result. It produces concrete that is easy to pour into the formwork and it gives a good surface finish, he says. It is being pumped some 120m along the bridge deck to the concreting position. Concrete is produced by a transportable mobile plant located only 1km from the bridge site. Constant monitoring of the concrete weight is necessary to ensure that the cantilevers are properly balanced. This is tested for each pour. The project began in January 2020 at Aker Verdal with the production of caissons for the pier bases. In May 2020 the two caissons were towed 500km north to the bridge site. The bridge is being poured in situ using special mobile construction equipment developed by NRS. The cycle for construction of each 5m wide bridge segment is a week, and two mobile units are being used on the Sundoya Bridge. These particular units were built for AS Anlegg to use on the Varodden Bridge in Kristiansand in Norway, and they have also been used by the same contractor on the Rafsundet Bridge. The design of the central part of the main span of the bridge is based on the use of lightweight concrete LC60 while other parts of the structure use the more standard type C65. Because of the aggressive marine environment, the quality of the concrete must be part
畢業(yè)設(shè)計(jì)相關(guān)推薦
鄂ICP備17016276號-1