Detailed text transcripts for TV channel - BBCNEWS - 20210513:12:26:00
These segments, which are concrete, steel fibre reinforced, are needed to support the ground in the tunnel. so, theyre erected by the tbm machine while the tbm is driving. its very important, its crucial to the project, so that the tbm can keep going and keep installing the segments and therefore producing the tunnel. people here are deeply worried the work will fracture the fragile rocks surrounding the tunnel, causing water to simply drain away from rare chalk streams, like the river misbourne...
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