M25 Manhole Bay Replacements

Sector: Highways
Client: Connect Plus Services (Skanska)
Main Contractor: Skanska
Project: M25 Manhole Bay Replacements
Works: Replacing MH Surround Slabs
Duration: 7 Weeks
Value: £130k

This scheme was part of the M25 Maintenance framework contract which TAG construction have been a part of for the last 4 years working with main contractors such as Skanska, Osbornes and Jacksons.

This particular scheme was to replace 6no PQ Concrete bays that had MH accesses integrated in to them on Saturday nights between 23:00 – 06:00. When these bays are replaced over night the working window is only 7 hours before we have to open the road back up to traffic. To ensure these works went without any issues TAG were employed to carry detailed out trials with Skanska.

Each bay was lifted out from the ground by vacuum method and removed from site. The steel reinforcement was placed and the manhole access frame and cover was reinstated before a rapid setting concrete was placed. The concrete was cured in covered tents with temperature controlled conditions.

Under challenging cold conditions these works went without any issues and the road was opened successfully each weekend to the public. The success of these works was down to the amount of pre works preparation that went into each shift and the experience TAG has in this sector of works.

Bexhill to Hastings Link Road – Gabion Retaining Walls

Sector: Civils
Client: Taylor Wood
Main Contractor: Taylor Woodrow/Hochtief JV
Project: Bexhill to Hastins Link Road
Works: Gabion Retaining Walls
Duration: 12 Weeks
Value: £225,000

This project was to Replace circa 465mtrs of gabion retaining walls between 1mtr and 3mtrs high and 7no sections of the highway and walkways. Due to the dangers of excavating on a steep embankment precautious methods had to be adopted to ensure the safety of the operatives carrying out the works.

The client had a tight programme to achieve which was completed ahead of the original programme and on the original budget. TAG and the Taylor Woodrow / Hochtief site teams worked closely to ensure the works minimised disruption to the local highways and walkways.

TAG Supplied all necessary labour, plant and welfare facilities to carry out the replacement works as a package.

M25 Resurfacing Concrete Bay Replacements

Sector: Formwork, Reinforcement & Concrete
Client: Connects Plus, SKANSKA, Osborne
Project: M25 Resurfacing Concrete Bay Replacements
Duration: 3 months

The repair method involves utilising the first night time lane closure for saw cutting the concrete carriageway into sections which are lifted out and replaced the following night. This is done via our Vacuum Lifter; a whole bay is out within a matter of minutes. Dowel Holes are drilled using the EZ slab rider drill that has been designed for applications that call for optimum concrete drilling accuracy. It is an economical option requiring minimal set – up time. Drilling each bay only takes 5 minutes; traditional methods would take up to 1 hour.

The concrete is mixed in-situ and placed using one team per bay. The teams have had to learn to work with the material which acts very differently to normal concrete.

Conventional repairs and materials would take a minimum of 4 nights and 1 day to repair each bay. Using rapid cure concrete and our improved system we currently replace up to 2 bays per night with capacity to do more within the time frame.

The success of the bay lifting procedure using our vacuum lifter has had interest in other sectors such as aviation. We have successfully carried out trials for Ferrovial Agroman at Heathrow Airport which consisted of lifting 500mm deep PQ Slabs within the Taxi-Way and Apron areas.

The process was also trialled at London City Airport for Bay replacements with great success. Not only does it have the benefits mentioned above, it has also been greatly received by the residents around London City Airport for the reduction in noise pollution which the conventional breakout system generated.

Portsmouth Road Cycle Lane Upgrade

Sector: Highways
Client: Kingston Borough and TFL (Kier Highways LoHAC)
Main Contractor: Kier Highways
Project: Portsmouth Road Cycle lane upgrade
Works: Construction of new Reinforced Retaining walls and staircases
Duration: 20 Weeks
Value: £305k

This scheme was part of the cycle highway project for TFL where a social riverside area was to be re-developed for Kingston Borough Council. It was constructed on two sites both offering garden areas for local residents to enjoy at their leisure.

Working for Kier Highways, TAG construction were awarded the tender to construct over 500mtrs of reinforced decorative concrete retaining walls, cast 7no large concrete staircases with stainless steel hand rails, create 4no Cumaru timber decking seating areas, install over 100 metres of pedestrian guardrails and to supply and install many other decorative furniture items.

These works were carried out alongside the groundworks contractor in very challenging conditions. To ensure these works were delivered efficiently and safely TAG developed a good working relationship with the groundworks contractor and Kier site management.

TAG worked very closely with Kier Highways to overcome many challenges that arose from the scheme to deliver a high quality end product for the local area to enjoy.