Transcription of Bridge Construction Methods - PTIA
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Bridge Construction Methods - PTIA
Bridge Construction MethodsBy David TRAYNERC ontentsA. Introduction of SpeakerB. Bridge Construction Methodsi. Pre-castii. Cast in-situiii. OthersC. Precasting TechniquesD. DuctalA. SpeakerDavid - Special Projects Operations Manager : UTS 1990 BEng; UNE 2001 MBA Costain Australia Pty 2004 VSL Heavy Lift Operations NS4 Tsing Mah Bridge Skybridge Petronas Twin Towers Burj Al Arab, 4 New Bangkok International Airport, BKK, onwards VSL Australia, Projects: LHD, BRB, GDE, GUPP recast Concrete Bridges1. I Beams & Super Tee s2. Segmental3. Full Span Cast in-situ post tensioned concrete decksPrecast I Beams & Super Tee s1. Description Standard Beams can be pre & or post tensioned. Cast on site or in existing PC Yard2. Advantages Cheap Simple to erect3. Disadvantages Limited in length (lat torsion buckling) Less efficient Logistics (police escort etc) Aesthetics banned in some countriesCebuCebuSouth Coastal Road South Coastal Road --PhilippinesPhilippinesCebuCebuSouth Coastal Road South Coastal Road --PhilippinesPhilippinesCebuCebuSouth Coastal Road South Coastal Road --PhilippinesPhilippinesPrecast Segmental Techniques1.
Precast Segmental Techniques 1. Description • Complete deck cast, delivered & erected in unique cells • Segments are prestressed together using external and or internal tendons. Joints can be “dry” or “wet”. • Typically in Span by Span or Balanced Cantilever mode 2. Advantages • Structurally efficient and aesthetic • Complete with deck when erected I.e. rapid & safe
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