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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 ...
Structural failure — support piers collapsed 7 killed, 0 injured Complete failure of two spans on I-5 Due to extreme rainfall, the Arroyo Pasajero experienced high volumes of water at high speed. This caused scouring of the river bed undermining the support piers of both spans. Elhovo bridge over the Tundzha river [43] Elhovo, Yambol Province
A wooden deck was then erected atop the falsework to support the lowest forming surface. Reinforcing for the lowest surface of the box structure was then added, and the concrete was poured. During the initial pour, reinforcing and formwork for interior shear beams and any included tendon conduits were added. Later, another concrete pour was ...
The deck was formed from in-situ concrete laid onto timber plank formwork which was supported by a system of falsework. This consisted of a series of 26 lattice trusses beneath the deck. These measured 98 feet 4 inches (29.97 m) in length (extending into an adjacent span) and were made of four lattice sections connected together by scaffolding .
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.
Falsework required Yes, if cast-in-place reinforced or prestressed concrete is used, which is typical for freeway overpasses Section of a twin box girder bridge Erskine Bridge , near Glasgow, Scotland Single box girder bridge ( concrete ), Australia .
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The formwork stays in place after the concrete has cured and acts as axial and shear reinforcement, as well as serving to confine the concrete and prevent against environmental effects, such as corrosion and freeze-thaw cycles. Flexible formwork. In contrast to the rigid moulds described above, flexible formwork is a system that uses ...