die transfer cart for tunnel construction 1-500 t
Ilam tunnels inspection, maintenance, and rehabilitation: A
1/4/2021 · The construction of the tunnel was completed in 2009 (). Both entrances are covered with masonry lining, while the middle part is an unlined-rock tunnel stabilized with rockbolts. Most rockbolts have lost a significant amount of their performance over the last few years due to corrosion, harsh environment, and asymmetric loading.
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