Tenders Are Invited For Engineering Design Services – Inspection Of A Bridge Facility On Pencho Slaveikov Blvd. Over Bulgaria Blvd.

Engineering Design Services – Inspection Of A Bridge Facility On Pencho Slaveikov Blvd. Over Bulgaria Blvd.. 1. Geometrical And Structural Characteristics: Structural Drawings Of The Bridge Type Of Prestressing (External, Internal, Adhesive Or Non-Adhesive) Location And Specification Of Tensioned Reinforcing Cables Type And Location Of Load-Bearing Elements (Beams, Slabs, Columns, Etc.) Type Of Bearings And Joints 2. Structural Condition: Data From Visual Inspection (Cracks, Corrosion, Deformation, Peeling Of Concrete) Data From Non-Destructive Testing (Ultrasound Tests, Radar Scanning, Magnetic Measurements) Corrosion Data Of The Tension Reinforcement (Potential Measurements, Chemical Analyses) Presence And Condition Of The Grout Around The Tension Cables Check For Stress Losses In The Reinforcement 3. Loads And Operation Data: Real Loads (Traffic, Temperature Effects, Wind, Seismic Impact) Historical Data For The Operation And Previous Repairs Measured Deformations Analysis Of The Dynamic Behavior Of The Bridge 4. Waterproofing And Drainage: Condition Of The Waterproofing Functionality Of The Drainage System Presence Of Water Seepage And Possibilities Of Corrosion Processes 5. Recommendations From The Laboratory: Conclusions Of The Survey Recommendations For Strengthening Or Replacing Elements Methods For Restoring The Tension Reinforcement Possible Repair Technologies (Carbon Tapes, Injection, Replacement Of Bearings) 6. Characteristics Of Testing Concrete Cores: Compressive Strength – Determined By Laboratory Tests Of Removed Concrete Cores Modulus Of Elasticity – Measures The Deformation Properties Of Concrete Density Of Concrete – Related To The Composition And Quality Of The Material Degree Of Carbonation – Through A Phenolphthalein Test It Is Estimated How Far Co₂ Has Penetrated Into The Concrete, Which Affects The Corrosion Resistance Of The Reinforcement Presence Of Chlorides And Sulfates – Through Chemical Analysis The Risk Of Corrosion Cracks And Microstructural Defects – Microscopic Analysis Of Concrete Structure To Detect Microcracks And Internal Defects 7. Reinforcement Test Characteristics: Diameter And Loss Of Section – Measurement Of Corrosion Losses In Prestressed And Unstressed Reinforcement Tensile Strength And Yield Strength – Laboratory Tests To Determine The Mechanical Properties Of Steel Hardness And Chemical Composition Of Steel – To Assess The Quality Of The Material Used Degree Of Corrosion – Visual Analysis And Potentiometric Measurements To Determine The Risk Of Reinforcement Failure Adhesion Between Reinforcement And Concrete - Adhesion Tests, Particularly Important For Tension Reinforcement