Prestressed anchorage is often used in the foundation construction industry, and it plays a reinforcing role in engineering.
Prestressed anchorage application areas: highway bridges, railway bridges, urban interchanges, urban light rails, high-rise buildings, water conservancy and hydropower dams, ports and docks, rock slope protection and anchoring, foundation reinforcement, tunnel and mine roof anchors, prestressed grids, subways, large-scale buildings, warehouse buildings, tower buildings, heavy lifting, intermittent sliding film advancement, bridge and tunnel jacking, large vessels and ships, sleepers, replacement of bridge bearings, reinforcement of bridges and buildings, reinforcement engineering, anti-magnetic and anti-corrosion engineering (fiber anchoring), carbon fiber reinforcement, pre-tensioned beam field construction, external prestressing engineering, stay cables, suspension cables, etc.
Prestressed anchors are anchors for concrete prestressing tension in buildings. Generally, there is a prescribed position, and then the concrete is poured to play the role of tension. Anchors are most often found on bridge buildings. Basic model of anchor: The model of the anchor represents this different anchor. The specifications of the anchor are generally strict, so the model represents different anchors. M15-N and M13-N anchors. M is the first letter of the Chinese pinyin of anchorage, 15.24mm or 12.7mm represents the steel strand, which is the basic structure of the model. Technical characteristics of anchor
One of the two methods we commonly use is the pre-tensioning method, and the other is the post-tensioning method. The pre-tensioning method first stretches the steel bar to control the stress on the pedestal according to the specified design requirements, and temporarily fixes it with anchors until the design strength reaches 75 Many cut and loose steel bars rely on the bonding force between the steel bars and the concrete to transmit the preload. Simple construction, self-anchor relying on cohesive force, no need to consume other anchors, anchors can be reused, economical and stable quality during mass production, and used in the factory production of small and medium-sized components. The main process of the post-tensioning method is to bury control holes, cast concrete, draw pipes, maintain and stretch tendons, anchor, and grout. Relying on the anchorage to prevent the elastic rebound of the steel bar, so that the cross-section concrete obtains the pre-stress. This method is relatively simple to use, does not require tensioning of the pedestal, and is flexible in production, but requires reliable anchors and jacks. The amount of steel used for the anchors is large, and it is suitable for on-site construction of large components.