This looks likes a fairly boring story in more ways than one:
Two of the world’s largest tunnel slurry borers are starting to drive 9-kilometer-long tunnels under China’s Yangtze River, in Shanghai. They are a key element of the $1.6-billion, 25.5-km Shanghai-Chongming Expressway. The link between Shanghai, Changxing Island and Chongming Island is to be completed in time for the 2010 Shanghai Universal Exposition.
At the Yangtze’s estuary in Shanghai, one record-breaking, 15.43-meter-dia tunnel-boring machine set off from a shaft at Pudong late last year. The second, close on its heels, is also expected to drive 400 m a month through clay, silt and sand.
Yeah, yeah, record-breaking, I thought. But then I took a closer look at the picture there and saw the little tiny blokes at the bottom. This really is a big borer.