Tunnel Portal Stabilization

Description

Sections of road/rail through a tunnel are often the most dangerous types to build. Landslides are a looming threat, and special foundational methods are required. Portals are the longest open parts of the construction, often with several construction phases, but serve well to protect a vulnerable stretch of tunnel. Portal protection, slope stabilization, rock fall protection, Grouting, drainage wells, or anchored walls may be required. Preparation of the design is key, and builders should also ensure that steps are taken to keep site transport open.

Risk Faced

Slope failures due to change in weather
Transportation Problems
Human Safety
Delay in project timelines

Challenge

Rock Type
Water source availability
Seismicity
In-situ Stresses
Strata Orientation
Shear Zones
Thrust Zones
Aproach road accesiblity
Uneven Strata
Steep Slopes
Weathered Rock Mass / Soil
Water Bearing Situations

Product Matrix

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