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The objective of all tunnel projects is to deliver the completed tunnel in time and in budget within acceptable environmental impact guidelines. This requires a complex...

Most often geological site investigation for tunneling projects does not include directional cored bore holes covering the whole future tunnel alignment...

The flow of water into tunnels and the lowering of ground water levels is a transient process governed by the permeability of the ground, the storage...

The engineering community has successfully completed many exceptionally challenging construction projects. Unfortunately, history has shown that ...