From November 2022 the team are starting works on constructing the air treatment chamber by the southern side of the shaft. We will initially install sheet piles from 3 November for two weeks.
Following the sheet piling a number of bored pile foundations will be constructed from the surface. A piling rig will be in operation which will place cylindrical casings into the ground. We will then bore out the internal material to allow the casings to be sunk to the required depth. Handling the casing will cause periodic, very short duration noise, but the majority of the operation will not generate disturbance. The bored piling is scheduled to be undertaken from 21 November for two weeks.
On completion of the bored piling we will then be inserting sheet piles. An excavator with vibration attachment will pick up, align and vibrate in the sheet piles around the outer exterior of the same area subject to the bored piling. The sheet piles will allow for excavation to occur within without risk of the excavation collapsing. Sheet piling will take place between 18 – 28 November.
Once all the piles are installed, the area will be excavated to a depth of 7m. As the excavation is undertaken the previously installed bored piles will be broken down using an excavator with a breaker attachment. Once at the base of the excavation the bored piles will be reduced so that they can be incorporated in the bottom slab of the new structure. Works will then comprise the installation of steel reinforcement and concrete to construct the air treatment chamber back to surface level.
All piling works will be carried out in normal core hours 8am to 6pm Monday – Friday and 8am to 1pm on Saturdays. We will be monitoring the noise levels throughout these works. If you have any questions about our works at Kirtling Street please get in touch with our helpdesk on 08000 30 80 80 or [email protected]
