我国桥梁建造企业攻克多项技术难关,在杭州湾跨海大桥工地制造出我国最大的预应力混凝土箱型简支梁,并达到在海洋氯离子侵蚀条件下使用100年的质量标准。杭州湾跨海大桥是我国继三峡大坝、青藏铁路、南水北调工程之后的第四大工程。它全长36公里,跨越世界第三大强潮区,是世界最长 China’s bridge construction enterprises have overcome a number of technical difficulties and created the largest prestressed concrete box-type simply supported beam in China’s Hangzhou Bay Cross-sea Bridge construction site and reached the quality standard of 100 years under the conditions of marine chloride ion erosion. Hangzhou Bay Bridge is our country after the Three Gorges Dam, Qinghai-Tibet Railway, South-North Water Diversion Project after the fourth largest project. It is 36 kilometers in length, spanning the third largest tidal range in the world and is the longest in the world