Tenders Are Invited For Construction Work – Minimal Repairs To Sihlbrücken

Construction Work – Minimal Repairs To Sihlbrücken. At Zurich Main Station (Hb), 25 Sbb Bridges Cross The Sihl. Of These, 16 Bridges Are Track Bridges And 9 Bridges Are Platform Bridges. The Bridges Are Approx. 68M Long And Span As Continuous Girders Over 5 Culverts With Spans Of 13.40 - 13.80M Long. The Approximately 3.5M Wide Track Bridges Are Designed In Cross-Section As A Trough With Side Rolled Girders, Steel Ribs And An Internal Concrete Trough. The Platform Bridges Consist Of A Concrete Slab With Steel Girder Beams. Historically, The Zurich Hb Was Rebuilt Several Times And There Are Bridges Built Between 1857 And 1990. From March To May 2027, The Structures Are To Undergo Minimal Repairs In Order To Achieve A Maintenance-Free Period Until At Least 2050. In Particular, The Following Measures Must Be Implemented: * Comprehensive Repair Of Defects In The Corrosion Protection On All Bridges * Mechanical Adjustment / Welding Work And Crack Testing On 123 Slat Ends On The Bottom View Of The Seven Track Bridges From 1928 (Thomas Steel) * Crack Testing On The Upper Flanges Of The Track Bridges From 1928 * Addition Of Approx. 6 Ribs In The Platform Bridge 1857 (Puddel Steel) * Replacement A Roller Bearing Through A New Pot Bearing (Track Bridge 4 From 1928), Further Individual Investigations And Measures On Bearings * Local Concrete Repairs, In Particular 11 Areas Of Approx. 3.5X0.7M Each On The Underside Of The Bridge * Extension Of Drainage Pipes (Approx. 250 Pieces) * Replace Individual Loose / Missing Screw Connections / Rivets With Screws The Measures Are To Be Implemented From The Sihl Using Hanging Scaffolding. Access Is Via The Postterasse Sihl Hb. An Installation Area Of ​​Approx. 200M2 Is Planned On The Post Bridge. Nighttime Track Closures Are Planned For Work On The Upper Flange Of The Track Bridges. In Addition To The Necessary Safety Measures When Working On Rivers, The Flood Situation Must Be Monitored And Appropriate Work Interruptions And Construction Site Clearance Must Be Taken Into Account. The Minimal Repair Sihlbrücken, Hb Zurich, Is To Be Awarded To A Contractor Who Carries Out Steel Construction Work, Scaffolding Work, Concrete Repair Work, Warehouse Work And Testing With Subcontractors.