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Completed falsework: Decking and some formwork has been added. The illustrations are of modern pipe-column falsework, used to support the formwork for a post-tensioned reinforced concrete flyover connector for the eastern span replacement of the San Francisco-Oakland Bay Bridge. When the supports are complete, wood beams and plywood or reusable ...
Total bridge failure Security camera images show the collapse in animation, looking north. Collapsed at 6:05 pm beneath bumper-to-bumper rush hour traffic confined to 4 of 8 lanes due to resurfacing in progress. The rebuilt I-35W Saint Anthony Falls Bridge was reopened on 18 September 2008. Tuo River bridge Fenghuang, Hunan
Right: Northern columns, falsework, and formwork (westbound to tunnel upper deck). Late 2011 Progress: A portion of the SAS span is seen the bottom of the image. Late Summer, 2012: The westbound link falsework and formswork were disassembled and are now used to construct the eastbound link (center of image).
This is a list of structural failures and collapses of buildings and other structures including bridges, dams, and radio masts/towers. This is a dynamic list and may never be able to satisfy particular standards for completeness.
A cantilever bridge is a bridge built using structures that project horizontally into space, supported on only one end (called cantilevers).For small footbridges, the cantilevers may be simple beams; however, large cantilever bridges designed to handle road or rail traffic use trusses built from structural steel, or box girders built from prestressed concrete.
Fifty-one people were killed in these failures, leading in the UK to the formation of the Merrison Committee [4] and considerable investment in new research into steel box girder behaviour. Most of the bridges still under construction at this time were delayed for investigation of the basic design principle.
Shoring is designed to prevent collapse where shielding is only designed to protect workers when collapses occur. Concrete-structure and stone-building shoring, in these cases also referred to as falsework, provides temporary support until the concrete becomes hard and achieves the desired strength to support loads.
The bridge was part of a viaduct built by contractor Marples Ridgway in Reading, Berkshire, as part of the A329(M) motorway, a link road to the M4 motorway to the east. The eastbound and westbound carriageways and a separate on-slip to the westbound carriageway were all constructed on separate post-tensioned reinforced concrete viaduct structures.