Tenders Are Invited For Sewer Renovation In Closed Construction In The Bornheim Urban Area

The Bornheim Aör Municipal Company Intends To Repair Existing Damaged Sewers Using A Closed Construction Method In Various Districts Of Bornheim (Focus: Rösberg/Merten And Roisdorf/Hersel) And To Renovate Around 50 Sections Using Hose Liners. In Addition, Repairs Are Carried Out “In The Pipe” In Around 45 Positions And Repairs Are Carried Out By Hand In Around 80 Shafts. The Construction Period Is 120 Working Days. In Order To Meet This Deadline, Several Renovation Crews Must Be Deployed At The Same Time. The Renovation Is Carried Out Using Hose Lining. In Order To Install The Liners Correctly, Repairs To Nozzles, Pipe Damage (Cracks Or Similar) And Shafts Are Required. The Existing Connections, Lengths, Diameters And Other Information Can Be Found In The Attached Catalog Of Measures. The Total Length To Be Renovated Is Approx. 2,000 M. With The Liner Installation, The Client Intends To Restore The Target Condition Of Damaged Canals. The Quality, Hydraulic Performance, Operational Safety And Service Life Of The New Building Should Correspond To Din En 752, Part 5. The Exact Location And Condition Of The Side Inlets In Operation Must Be Recorded And Measured By The Contractor Before The Main Sewer Is Renovated. Watertight Connections Must Be Made According To Lv Positions On All Side Inlets On The Main Sewers That Are In Operation. Before Renovations Or Repairs Begin, The Individual Damaged Areas Must Be Recorded By Means Of A Sewer Inspection And Their Position Must Be Precisely Measured. A List Of The Damage And The Existing Connecting Cables Is Included In The Tender. In Damaged Sections, Selective Repairs Are Planned Using The Grouting Robot And Short Liners. It Is Planned To Repair Damaged Shaft Walls And Channels Using Plastic-Modified Mortar Or Sewer Clinker And To Replace Climbing Aids. The Repair Work To Be Carried Out Can Be Found In The Attached Catalog Of Measures And Carried Out Accordingly. Due To The Dense Development And An Average Street Width Of Approx. 5 M, The Space Available Is Very Limited. The Construction Process Must, Among Other Things, Be Coordinated With The Aforementioned Boundary Conditions. Annoyance To Residents Must Be Kept As Low As Possible. In Principle, Only The Use Of Super-Sound-Insulated And Low-Vibration Construction Equipment Is Permitted. Access To The Properties And Houses Must Be Kept Clear. All Services Include All Associated Materials, Ancillary Services And Personnel Unless Expressly Stated Otherwise In The List Of Services. All Deliveries And Services Must Be Carried Out In Accordance With The Generally Recognized Rules Of Technology. If Necessary. Existing Din Standards Are Generally Part Of The Contract In The Version Valid At The Time The Offer Is Submitted. The Contractor Must Submit A Construction Schedule (In Triplicate) Before Construction Begins, Which Will Become Part Of The Contract In The Form Checked By The Construction Management.