One of the key challenges is that we rarely know the existing conditions and level of detail required to complete the assignment. This requires a careful and thoughtful approach to gathering and synthesising information as investigations and incremental lining removal and replacement proceeds.
Lining distress can manifest itself as relatively small-scale degradation or as larger-scale deformation. Understanding the cause and effect relationships that tend to drive the degradation of lining quality and larger scale deformations is key to solving problems when faced with a paucity of information.
Our experience involves projects including tunnels lined with brick, cast-in-place concrete, timber linings, cast-iron segmental linings, and immersed tube tunnels.
Our rehabilitation-related capabilities include:
- Tunnel structure repair
- Internal structure reconstruction
- Tunnel waterproofing
- Operational and functional changes
- Enhanced facilities
- Improvements to safety
- Upgrading of equipment installations
- Improved ventilation
- Geometric enlargements to increase operational clearance
- Additional openings such as cross passages