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- W636707214 abstract "This article examines the construction techniques used in building a new line for the Beijing Metro. The Beijing Construction Centre of the Chinese Ministry of Railways' Tunnel Engineering Bureau has been building the line since 27 December 1993, as funds became available. Lack of funds halted progress in March 1996, leaving Tiananmen Square East Station partly finished, leaving platforms, stairways, tracklaying, etc still incomplete. The running tunnel to Tiananmen Square West Station was finished, but work had stopped on the drives eastwards under Eastern Tiananmen Street. In this part of Beijing, there is a surface infill layer of about 3m, below which there are layers of 5.3m of sandy clay, 3.1m of gravel and sand holding ground water, and 3m of clay above a similar layer. The cavern at Tiananmen Square East Station is 218.3m long by 24.2m wide by 15.25m deep. Its cast reinforced concrete deck at street level rests on rows of cylindrical concreted pillars, founded in the clay. As the concrete deck was progressively finished at street level, excavation started from the top downwards. The twin bore running tunnels are covered by about 9m of overburden, with centres 16.8m apart and 6.1m high by 5.9m wide cross-section. Tunnelling is by 'shallow depth mining', which relies on extensive ground support in soft ground." @default.
- W636707214 created "2016-06-24" @default.
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- W636707214 date "1997-06-01" @default.
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- W636707214 title "TIANANMEN SQUARE: CONSTRUCTING A NEW METRO" @default.
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