Ground freeze remedy at Hull

摘要

The Hull flow transfer tunnel was constructed for Yorkshire Water to direct sewage flows to a new treatment works, allowing compliance with the European Union's Urban Wastewater Treatment Directive. Miller Civil Engineering (MCEL), now Morgan EST, was commissioned to design and construct the works, with Arup appointed as project manager. The total scheme value for the tunnel was US$122M. The Conditions of Contract were based on the Institution of Chemical Engineers (IchemE) Model form for Process Plant, Greenbook, which provided a target cost reimbursable contract incorporating 'painshare' and 'gainshare' incentives. The 8.4km transfer tunnel, located along the north bank of the River Humber, was designed to allow untreated effluent to flow by gravity from the existing system to a new treatment works. The 3.6m i.d. tunnel was bored using an EPB TBM. The tunnel was lined with a pre-cast segmental lining comprising a 250mm thick, six piece reinforced tapered ring, fitted with EPDM gaskets.