Thames Tideway Tunnel - C405 Main Works West - Hammersmith Tunnel Connection Shutter

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. Section 4: Scope of Works Supply only of shuttering as per drawings. The shape of the finished concrete is shown in the drawings provided. BMB will be have responsibility for the installation of the connection shuttering. Pre-fabrication of shutter sections may be possible, but a scheme would have to be developed to get then into the tunnel, turned and lifted into position. (No access will be possible from the connecting tunnel). BMB request that you detail this as a option in your return. Any fixings left in place will be subject to review due to durability or may have to be stainless. Due to ring creep, the position of the ring edge may vary to that shown. As-built surveys will be provided to update drawings and dimensions. Deliveries will be to Carnwath Road Site. Drawings - 3330-UNPSL-HAMCT-450-CZ-DR-000013 3330-UNPSL-HAMCT-575-CZ-DR-000017 3330-UNPSL-HAMCT-575-CZ-DR-000018 3330-UNPSL-HAMCT-575-CZ-DR-000019 3330-UNPSL-HAMCT-575-CZ-DR-000023 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.