As nominated specialist sub-contractor of Amey for the
Scottish SW trunk Road contract USL BridgeCare successfully
tendered for the replacement of a bridge joint on the M8 8-8 130
M8EB to M73SB 'High Loop Slip' Road.
The M8 8-8 130 Baillieston High Loop is a multi-span overbridge
crossing the M8 motorway and is principally used by M8 eastbound
traffic wishing to join the M73 SB and ultimately M74 East or West.
The bridge carries a 2-lane single carriageway and hard shoulder
slip road. The total deck with is 13.65m. The work on the bridge
comprises the replacement of the exiting expansion joint together
with associated localised deck waterproofing, surfacing and
concrete repairs as necessary to the bridge deck.
- Baillieston Interchange is comprised of a myriad of bridges,
cuttings and embankments, set within the central lowlands of
- There are no residential properties located within 200 metres
of this site.
- The view from the carriageway is of motorway embankments
and over bridge structures.
The contract to replace the existing joint consisted of the
- Site survey to ascertain and confirm existing site data
- Traffic Management; Lane and slip road closures aswell as local
- Installation of temporary bridging units or road plates as
necessary to undertake the works.
- Removal and replacement of the existing waterproofingsystem
within the vicinity of the bridge joint. Waterproofing of concrete
decks, top abutment walls and fixed bridge joints was done by USL
BridgeCare's Britdex MDP waterproofing system.
- Replacement of the existing failed expansion joint with a
Euroflex M330 by RW International.
- Removal and reinstatement of verge kerbs necessary for the
installation of the new joint
- Removal and reinstatement of verge kerbs above bridge
- Delamination survey to the exposed top surface of the bridge
deck and accessible areas of deck soffit and expansion gap at the
- Concrete repairs arising from the delaminationsurvey to either
side of the deck and, where appropriate, the vertical faces of the
Hydro demolition - The removal of
the concrete inlay was completed in approximately 12 hours. A
section of joint approximately 6.5 metres long was exposed via
hydro demolition techniques.
Removing joint using crane lift
Lifting units into
The works to the bridge took place under a number of carriageway
closures. They consisted of; off peak weekday/overnight closures
and weekend total closures of the slip road. Temporary diversion
was implemented during all full closures of the slip road.
An indicative programme was devised by Amey/Transport for
Scotland and USL BridgeCare which allowed for the contract to be
completed between the months of July and August to avoid peak
traffic flows that usually occur when school holidays are finished.
It was critical the works did not extend into September.
The installation of the new Euroflex expansion joint system and
associated works was completed on time and budget to the completed
satisfaction of the client.