TMS were contracted by First Hydro at Dinorwig Power Station, to remove river bed material that has built up over the years into the purpose built 2km long diversion tunnel. The tunnel was constructed to divert the Nant Peris River which keeps the reservoir levels at a minimum this enables the power station to generate electricity.
TMS brought in floating plant and machines with specialist confined space equipment to remove the gravel that has been entering the diversion tunnel in flood conditions.
TMS have removed the temporary sheet piled cofferdam, which was installed by us in February to enable the construction of the new bridge abutment. As there were five cables running through the cofferdam, the cofferdam was partially extracted and partially cut off by TMS divers
TMS have started laying the limestone setts from the reclaimed stone that were on the top of the old plinth, which had been broken out prior to the beginning of the works.
When installed the new limestone setts create a frame around the newly laid slabs on the higher plinth. We have been busy forming the new transition steps from the lower plinth to the higher level plinth, using a light weight Material blocks and wrapping them in polythene before fixing steel reinforcement rebar cages. A stepped shutter was then placed and fixed to the cages & concrete was then poured to create the new steps which now joins the two levels
TMS were awarded the contract for the repair works to masonry walls in Cremyll, Mount Edgcumbe. The repair works took place at four locations within Cremyll – Mount Edgcumbe Quay, Toll House Quay, Lower Lodge and Garden Battery Beach.
The works were carried out principally from the main work area at Mount Edgcumbe Quay, with operatives working at the other locations as and when the tides permitted.
At Mount Edgcumbe Quay, the project comprised of material recovery, bulk excavation of material, reconstruction of the wall and surfacing works in order to fully repair the damage to the wall. Vegetation removal, mortar repointing and basic masonry reconstruction was completed at the other three locations. The total value of the contract was approximately £400,000 and took 10 weeks to complete, 4 weeks ahead of programme.
The images show the different stages of the wall rebuild carried out at Mount Edgcumbe Quay, where the failed section of wall was rebuilt from foundation level to the top to match the existing wall either side and retain the original appearance of the wall.
Here we have a before and after picture of a section of wall that TMS have repaired after it had failed down at Cremyll, the wall has been fully rebuilt using locally soured stone and reinforced with concrete.
TMS successfully won the job to drive 180 linear metres of Piles to retain an existing road and allow for the ground to be reduced to enable the construction of a new Anaerobic Digester.
The site team had to work around existing structures and live gas tanks so the scheme wasn’t without its challenges, the biggest was the stiff ground that meant each pile had to be pre-augered before driving.