@unvoles: Box Jacked Railway Underpass A concrete tunnel is gradually pushed beneath the railway using hydraulic jacks and controlled excavation. The completed crossing allows vehicles to travel below while trains pass overhead. #boxjacking #RailwayUnderpass #TunnelConstruction #civilengineering

unvole
unvole
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Sunday 25 October 2026 16:14:38 GMT
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unvole :
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2026-10-25 16:15:09
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