| Structure and scale |
Tunnel: Main tunnel: L = 2,280m; working tunnel: L = 185.5m; representative excavation cross-sectional area: A = 54.7m2, lining, inverted arch: L = 828.5m, auxiliary construction methods: AGF method, pipe roof method, face bolt method, drainage boring; injection type FP/embankment/bank protection: series of river earthworks, series of ground improvement works, series of connecting basin construction works, series of flow channel construction works, series of vent construction works, series of bank protection works
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