Yangtze tunnel cross passages excavated

摘要

All eight cross passages have been excavated on China's major Pudong-Changxing Island tunnel project below the Yangtze river in Shanghai.rnLast month, excavation of the eighth cross passage was completed between the 7.5km long main tunnels that run below the Yangtze. The 15m long link tunnels are spaced are intervals of approximately 800m, had excavated widths of almost 4m using ground freezing and the finished openings are 2.74m wide.rnThe tunnelling works are being done by Shanghai Tunnel Engineering Corp (STEC) in JV with Bouygues, and breakthrough of the second 15.43m diameter Herrenknecht Mixshield (S-318)rnbrought the landmark main bores to completion in September last year.