Thames Tideway Tunnel - C405 Main Works West - Hammersmith Connection Culvert Formwork Design & Supply

Tender description

The Thames Tideway Tunnel project (the Project) will control CSO discharges by intercepting and diverting combined sewage flows into a new storage and transfer tunnel. The main tunnel will run from Acton Storm Tanks in west London to Abbey Mills Pumping Station in the east, where it will connect to the Lee Tunnel, which will transfer the combined sewage to Beckton Sewage Treatment Works for treatment. The Project extends from Acton Storm Tanks in west London, to Abbey Mills Pumping Station in east London. The Project includes associated works at Beckton STW, Shad Thames Pumping Station and Bekesbourne Street. The geographic layout of the Project and local authorities through which it passes is shown in Figure 1. The Project comprises: a. tunnels: i. a main tunnel which will capture and store combined sewage from CSOs along its route and transfer it to Abbey Mills Pumping Station, from where the Lee Tunnel will transfer it for treatment at Beckton Sewage Treatment Works ii. 11 connection tunnels, which will link flows from CSOs to the main tunnel. b. Worksites: i. five main tunnel Worksites (drive and/or reception sites) ii. 16 CSO Worksites iii. two System modification Worksites Thames Tideway Tunnel iv. works at Beckton Sewage Treatment works. Scope of Works BMBJV requires design and supply of shuttering for a Connection Culvert at Hammersmith Pumping Station (HAMPS). Details of the required culvert are outlined in this ITT and drawings for the required concrete design are also contained. BMBJV is constructing the Connection Culvert as part of the Thames Tideway West (TTW) project. This network will divert all storm overflows that are currently being pumped into the River Thames into the Main Tideway Overflow Tunnel. The Culvert joins the Interception chamber to the CSO Shaft. BMB JVs work in the Connection Culvert includes: - Back blinding of the Secant Piles to ensure a slip surface to the culvert walls - The concrete pour of walls and roof slabs of the culvert - Casting of connecting walls from Culvert to Interception Chamber Returned quotations will be evaluated by BMB JV's (BAM Nuttall, Morgan Sindall PLC & Balfour Beatty) Procurement team in conjunction with our design and engineering teams. Quotations will be evaluated based on; Cost Timeliness of return Adherence to and demonstration of understanding of the drawings and specifications provided at this point. Provision of accurate product specifications to accompany the quotation. Supplier experience of similar projects,evidence of this will be requested should the initial quotation be of interest. Should the candidate supplier be shortlisted they will then be contacted directly by a member of the BMB Procurement Team within two weeks of shortlisting to discuss the requirement in detail. BMB Joint Vent