According to the type of use
- Tensioning end anchor: installed at the end of the prestressed tendon, the prestressed tendon is always anchored during the tensioning process.
- Fixed end anchor: also called extrusion anchor or P anchor, installed at the end of the prestressed tendon, usually buried in concrete and not used for tensioning.
- According to the anchoring force principle: anchors anchored by friction resistance, anchors anchored by pressure, and anchors anchored by bonding force.
According to the shape
- Round anchor: good self-anchoring performance, tensioning generally uses a through-type jack.
- Flat anchor:
- Grip anchor (fixed end anchor): suitable for situations where the stress at the end of the component is large or the space is limited.
According to the number of clip holes
- Single hole anchor: suitable for anchoring a single strand, used for projects with small prestressing requirements or limited space, such as small prefabricated components.
- Multi-hole anchor: can anchor multiple steel strands at the same time, common 3 holes, 4 holes, etc., used in large projects such as bridges and high-rise buildings.
Material: Commonly used are steel, high strength, corrosion resistance, good pressure resistance; there are also wood (less used, easy to rot, low tensile strength), plastic (light weight, low cost, good wear resistance, good insulation, but relatively low strength), fiberglass (light weight, high strength, corrosion resistance, anti-aging, high price, difficult processing).
Specification: commonly used M15-N, M13-N. M represents anchor, 15 refers to 15.20mm steel strand (commonly used 1860MPa grade), 13 refers to 12.78mm steel strand, and N refers to the number of steel strands.
Application: used in various prestressed concrete structure projects such as highway bridges, railway bridges, high-rise buildings, water conservancy and hydropower dams, etc., to maintain the tension of prestressed tendons and transfer them to the inside of the concrete.
