QEII Bridge Maurer Joint Ramping System
Six expansion joints, which are vital to the operation of the bridge, had reached the end of their life-cycle. This meant lane availability was an issue. We needed a more:
- financially efficient method,
- sustainable method,
- reduced risk/increased certainty,
- reduce safety hazards associated with all previous ramping systems.
During the development it was realised that substantial environmental benefits would accrue, and that substantial lane availability costs would be avoided through maintaining normal traffic speed.
Innovators: Connect Plus, Connect Plus Services, Flint & Neill and the Framework Community.
- A new temporary over-ramp was developed to allow the workforce to repair the joints underneath, whilst traffic passed overhead.
- Allowed for short night time closures to complete the 18 month project.
- Modular ramp system comprising of 1.2 metre wide units which could be dropped into place.
- Built in finger joints allowed the bridge road surface to expand and contract naturally.
- Allowed traffic to safely travel at speeds of up to 70mph.
- Each ramp was installed and removed four times requiring the removal and replacement of 458 bolts.
The Benefits & The Future:
- Improved safety.
- Reduced traffic congestion.
- Increased sustainability – (circa 500te embedded carbon saved).
- reduced risk/increased certainty.
- Reduced cost – (circa £3m of lane availability charges avoided).
- Whole life benefit – (the methodology was an enabler to allow a full and robust WLC scheme to be implemented).
- The value comes from the efficiencies and effectiveness above, but safety and the ability to maintain existing traffic speed are the two overriding value enhancers.