Dyckerhoff & Widmann Aktiengesellschaft

Also Mannhart

Dieter Jungwirth

An anchoring device for a prestressing location can also serve as a coupling location for tendons in prestressed concrete where a subsequent bond is provided for the tendons. The anchoring device includes an anchoring member containing a plurality of bores divided into two separate groups, with each group arranged to anchor individual tendon elements extending into the anchoring member from an opposite direction. Each bore has an axially extending frusto-conical section and a cylindrical section extending from the smaller diameter end of the frusto-conical section. The frusto-conical sections in one group of bores are axially offset from the frusto-conical sections in the other group of bores. The bores in one group are filled with a plastic corrosion protection material, such as grease. Such corrosion protection material ensures a continuously active wedge-anchoring system which facilitates the movement of the wedges under full load conditions while providing a short bond-free length in the cylindrical section affording compensation for the time-dependent slippage of the anchoring device. A similar arrangement of the anchoring device can be used as a coupling device along the length of a tendon.

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Munich, Germany

Also Mannhart