What Is barrel and wedge?
In post-tensioned structures or components, the permanent anchoring devices used to maintain the prestressing tension and transfer it to the concrete.
Anchors can be classified into four types based on their anchoring methods: clamp-type (single-hole or multi-hole clamp anchors), bearing-type (forged-head anchors, nut anchors, etc.), cone-type (steel cone anchors, etc.), and grip-type (extrusion anchors, embossed anchors, etc.).
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Tensioning End Anchorage
Tensioning end anchors can be further classified based on their anchoring types: Clamp-type anchors (YJM) for tensioning prestressed steel strands, steel conical anchors (GZM) for tensioning high-strength steel wires, dowel-head anchors (DM) for tensioning high-strength steel wires after heading, nuts (YGM) for tensioning precision-rolled threaded bars, and cold-forged swaged-end anchors (LZM) for tensioning multi-strand parallel wire bundles.
Fixed-end anchorage
Anchorage devices installed at the ends of prestressing tendons, typically embedded in concrete and not used for tensioning, are also known as squeeze anchors or P-anchors.
Application
Highway bridges, railway bridges, urban interchanges, urban light rail systems, high-rise buildings, hydraulic power dams, port terminals, rock slope anchoring, foundation reinforcement, tunnel roof anchoring, prestressed grid structures, subways, large public buildings, warehouses and factories, tower structures, heavy lifting, slipform intermittent advancement, bridge and tunnel jacking, large vessels and ships, railway sleepers, bridge bearing replacement, bridge and building reinforcement, steel reinforcement works, anti-magnetic and anti-corrosion works (fiber anchors), carbon fiber reinforcement, pre-tensioned girder yard construction, external prestressing engineering, cable stays, suspension cables, etc.
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