On September 12th, a 6.35m diameter TBM passed its FAT at CRCHI’s second industrial park in Changsha and is now set to be shipped to Cluj-Napoca, Romania, where it will be used on the construction of the city’s metro system. This, says CRCHI marks the first time a Chinese-made TBM has been exported to Romania.
Two Chinese-made TBMs have been purchased for the Cluj-Napoca metro project, for use during the construction of the tunnel between St. Mary’s Station and United Europe Station. During the project, the first TBM is required to bore a single-tube tunnel of 5.6km, passing through complex geological conditions such as sand, gravel, salt mines, and five fault zones. The machine will also need to continuously excavation through sticky soil and turn through a small radius of 175m.
To address these challenges, including the risk of clay clogging the cutter head, CRCHI’s R&D team included a four-arm large-opening composite cutter head, multiple soil conditioning systems, advanced ground improvement through probe drilling and grouting, and an active articulation system.
Cluj-Napoca is Romania’s second-largest city, and the Cluj-Napoca metro tunnel spans approximately 21km, with 19 underground stations and one above-ground station.
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