Works For Complete Or Part Construction And Civil Engineering Work – Effluentleiding Rwzi. The Project Concerns The Sustainable Restoration Of The Effluent Pipe On The Site Of The Amsterdam West Wwtp (Aw), Between The Effluent Pits Of The Secondary Settling Tanks And The Effluent Gutter. This Involves Two Pipelines, One On The North Side Of The Site Along The Track And One On The South Side Along The Westpoortweg. In Essence, The Work To Be Delivered Includes: Applying Needle Felt Relining Impregnated With Resin To The Inside Of The Effluent Pipes With The Following Dimensions: 132 M Length X 900 Mm Diameter 265 M Length X 1250 Mm Diameter 338 M Length X 1600 Mm Diameter 113 M Length X 1800 Mm Diameter 463 M Length X 2000 Mm Diameter 57 M Length X 2200 Mm Diameter Carrying Out - Where Necessary - Inspections And Studies To Determine And Quantify The Defects In The Effluent Pipes To Substantiate The Renovation Method To Be Chosen. During The Construction Team Phase It May Become Apparent That Relining Is Not The Most Suitable Solution For All Effluent Pipes. In That Case, It May Be Decided To Apply Other Solutions, For Example Complete Replacement Of The Pipe. The Watertight Finishing Of The Relining On The Effluent Wells. The Provision Of Flexible Transition Facilities To Absorb The Residual Settlement Difference Between The Pipe And The Wells And To Absorb Thermal Deformations Of The Effluent Pipes. Functionally Maintaining The Required Drainage Capacity Of Effluent Water During The Implementation Phase By Installing And Removing Temporary Drainage Pipes. All Additional Work Including Temporary Auxiliary Structures And Facilities. In November 2023 It Turned Out That The Effluent Discharge Pipes From The Measuring Flume To The Outlet In The Port Also Showed Leakage. At The Intersection With The Dortmuiden Road, One Of The Ø 2000 Mm Pp Pipes Shows Cracks, So It Was Decided To Repair It Temporarily, But Then To Renovate, Strengthen Or Replace These 2 Pipes, Each With A Length Of Approximately 250 M. Add The Scope Of This Project. The Route Of Both Pipelines Is Shown Below As An Indication. In The Construction Team Phase, Further Research Will Be Carried Out Together With The Selected Market Party And A Decision Will Be Made As To Which Solution Will Be Chosen. During Repair Or Renewal Of These Pipes, The Required Capacity Of The Discharge Pipes Must Be Functionally Maintained, Which Means That A Third Pipe Must Be Installed Temporarily Or Permanently. Since A Temporary Pipeline Costs Just As Much As A Permanent One, A Third Pipeline Is Being Added To The Scope For The Time Being.
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