A406 Superscheme

Sector: Specialist Highways
Client: TFL
Main Contractor: Conway AECOM
Project: A406 Superscheme
Works: Replacement of RC retaining wall, refurbishment of Neasden Iron bridge deck and parapet foundations

The Neasden Superscheme was divided into three phases. 1) Dog Lane retaining wall replacement – remove acoustic barrier and existing VRS, saw cut and breakout of the carriageway, partial demolition of the existing RC retaining wall, repair to the construction joint, reinstatement of a new RC retaining wall. 2) Neasden Iron Bridge refurbishment – remove existing steel parapet, saw cut and breakout VRS foundations, breakout and remove existing bridge deck mass fill, refurbish bearing shelf access chambers, reinstall new RC VRS foundations with water main carrier, reinstall new deck mass fill to revised levels, breakout and replace RC abutment retaining wall and expansion joint 3) Dog Lane Arches – breakout existing VRS foundations, replace with new RC foundations including water main carrier, remediate back-of-arch drainage, repoint and repair cracks to brick parapet.

Other works included attendance to Thames Water for breakout and excavation, light column bases, duct installation and reinstatement of paving flags.

River Mole Bridge

Sector: Highways
Client: Breheny Civil Engineering
Project: River Mole Bridge

The main structure consists of a new bridge spanning the River Mole. RC elements include pilecaps, wingwalls, a central pier with bearing plinths and radius ends and abutments with bearing shelves and retaining walls. The main span was formed with precast beams, insitu diaphragms, insitu deck topping over GRP permanent formwork and insitu cantilever parapets, the second span was formed with an insitu deck on falsework poured around anchored EPS void formers.

TAG Construction Ltd were responsible for all formwork, reinforcement and concrete elements of the structure, including all temporary works designs and supply of temporary works, void former installation, permanent GRP formwork installation, movement and moment joint installation. The works followed a detailed programme produced by TAG to allow for successful sequential completion of the structure.

Harrow Road Parapet Repair

Sector: Specialist Highways
Client: TFL
Main Contractor: FM Conway
Project: Harrow Road Hybrid Parapet Repairs
Works: Contract to remove and replace steel vehicle restraint parapet and concrete repairs

TAG Construction Ltd were contracted to supply and replace approximately 140m of galvanized vehicle restraint parapet, including repairs to the concrete where existing cast-in ferrous metalwork had corroded, damaging surrounding areas. Existing steelwork was removed, the damaged concrete sections were broken out, shuttered and repaired using a C40 concrete incorporating new stainless holding down bolts. This included a detailed survey of existing steelwork lengths and the supply of all materials. Much of the work was carried out at height in conjunction with a rope access platform team. The project was split into two phases with a very tight programme along with additional concrete repairs to other sections of parapet.

Bexhill to Hastings Link Road (B2HLR)

Sector: Formwork, Reinforcement and Concrete (FRC)
Client: East Sussex Highways
Main Contractor: HOCHTIEF Taylor Woodrow JV
Project: Bexhill to Hastings Link Road (B2HLR)
Works: Greenways structures

TAG Construction Ltd were contracted to construct the greenway route bridge pilecaps, abutments and wingwalls. Works were carried out flood plains over rivers with associated safety and environmental hazards controlled. RC retaining walls were required between various structures to retain the backfill beneath the new road, including plinths and HD bolts for a new VRS. Culvert headwalls and wingwalls were constructed around precast culvert sections. TAG also provided the customer with skilled labour for various repairs and remediation to other concrete elements on the project.