Project Details
Description
BEAR Scotland has been commissioned by Transport Scotland to undertake various works to bentonite storage areas on the A87 Skye Bridge. Bentonite slurry is located within a gap between the mass concrete infill of the caissons and the structural concrete column of the two central piers. It provides a means for the two piers to rotate due to the bridge expanding and contracting under daily and longer-term temperature changes.
The works are required to improve access for sampling the bentonite (a contractual requirement) and will include the removal of water on top of the bentonite, in addition to top-up of the bentonite to design level.
The works will operate in two phases; Phase 1 works will involve the following:
- Modifications and improvements to the existing stainless-steel covers on the caissons at the base of both piers.
- Replacement of the existing access ladders with new stainless-steel ladders.
- Repairs to the existing caisson handrails.
- Develop a new bentonite sampling tool.
Phase 2 works will involve the following:
- Removal and disposal of the top water
- Top up the bentonite to the design levels
Site access for the works will be by boat via the slipway at the Kyle of Lochalsh. No traffic management (TM) is required. Requirement for a site compound is yet to be confirmed.
The Phase 1 works are currently programmed to be completed within the 2025/2026 financial year, with the programme for Phase 2 works yet to be confirmed. Works will be conducted during daytime hours, and operation will be planned in line with tide times, due to the nature of the works and access requirements.
Location
The works are scheduled to take place on the two central piers (Pier 3 - National Grid Reference: NG 74515 26929; and Pier 4 - NG 74407 26706) of the A87 Skye Bridge, within the Highland council area.