Vertical Walls with Concrete Facing Panels
2013
North Hykeham, Lincolnshire
Lincolnshire County Council
CNIM/Clugston Joint Venture
ARUP
Lincolnshire Energy From Waste
Construction taking place at EfW in North Hykeham
The completed structure at EfW North Hykeham
Completed structure
The completed structure at EfW North Hykeham
Completed structure
Construction taking place at EfW in North Hykeham
Completed structure
Construction taking place at EfW in North Hykeham
The completed structure at EfW North Hykeham
Problem
Lincolnshire’s new state-of-the-art Energy from Waste recycling plant at North Hykeham Lincoln is built on a low-lying brown-field site with a high local water table. This high groundwater level meant that the huge waste tipping hall had to be sited at the first-floor level rather than at the usual ground-floor level. Consequently, a vehicular access ramp was required to allow the constant stream of 40-tonne waste delivery wagons to the tipping hall. With a ramp height of 6.0m to the first-floor tipping hall deck and a maximum gradient of 1 in 10, the access ramp needed to be approximately 60m in length. Restricted space around the site meant that a long straight ramp with conventional low-angle side slopes could not be provided.
Solution
Consulting engineers, Arup, devised a curved double-sided access ramp formed of opposing vertical walls of Maccaferri MacRes® concrete retaining wall panels. These were to be tied together using PARAWEB® geosynthetic reinforcement strapping to form a reinforced soil structure similar in principle to that of a motorway bridge ramp construction. The MacRes® structure also supports the bank seat to a bridge section at the head of the ramp and immediately adjacent to the tipping hall access portal. The main contractor CNIM/Clugston JV brought in Maccaferri Construction who provided an indemnified design, supply and construction contract for the ramp installation.
Used Products
