Single-pass linings are rapidly gaining favour and can now be achieved to a high standard of construction and finish using precast segmental, or sprayed concrete. Sprayed concrete is the only method of tunnel lining support that forms an immediate and intimate bond with the strata that interacts actively with the ground surface instead of passively requiring the ground to move before it begins to resist that movement. A properly applied sprayed concrete lining is equivalent in strength, impermeability and durability to conventional cast in place concrete, and is often better in terms of compaction.
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In terms of equipment delivery, tunnelbuilder clients account for most of the world’s tunnelling projects. Each client maintains a list of reference projects, both as a historical record and as a means of gauging their competency for future work. These valuable documents can be accessed by clicking on our the ‘View References’ button in our client’s profiles shown below. All lists are subject to periodic update.