THE STRENGTHENING OF THE INN BRIDGE NEUHAUS-SCHÄRDING
The border bridge made of prestressed concrete between Neuhaus (Germany) and Schärding (Austria) built in 1973 was strengthened in 2017 by means of external strand tendons in longitudinal direction and with bar tendons in transversal direction. Horizontal drilling (inclined in plan view) of the concrete floor slab was required for installation of the transversal bar tendons. Due to the inclination of the webs of the box girder and the inclination in plan view, Hybridanker type HA with inclination in two directions were used. Additionally, the Hybridanker type HA could be placed onto the old concrete, without additional bursting reinforcement. Installation was performed by ANP-Systems GmbH.
SUSPENSION BRIDGE ST. ANTON AM ARLBERG (AUSTRIA)
The abutments and foundation of a new suspension bridge near St. Anton (Austria) were prestressed with bar anchors. For this purpose threaded bars with ball nuts were used. Hybridanker type HA both straight and 15° inclined with in factory produced grouting inlet and vent were installed. The lighter Hybridanker made the installation and prestressing operations easier. Installation was performed by DSI Underground Austria GmbH.
TEST BRIDGE BAM BERLIN
For prestressing of a test bridge in the material lab Bundesanstalt für Materialforschung und –prüfung (BAM) in Berlin Hybridanker type CoP for threaded prestressing bars with flat nut were used. Installation has been performed by BBV Systems GmbH.
HYBRIDANKER HA, CoP & CAB
RAILWAY BRIDGE SPOORBYPASS MECHELEN (BELGIUM)
The steel superstructure needed to be connected to the abutments with very high loads. This was realized with prestressing thread bars up to 75 mm in diameter. The distance within anchorages of the bars was extremely limited and arrangement of confining spirals was nearly impossible. Anchorages with up to 23° inclination have been used. Installation has been done by DYWIDAG-Systems International GmbH.
THE STRENGTHENING OF A BRIDGE NEAR HILDESHEIM
The unreinforced, concrete, arch bridge from 1910 was strengthened using internal, bonded, bar tendons. Horizontal drilling of the arch bridge was used for the installation and anchorage of the 4 meter long, transverse, prestressing, steel tendons. The Hybridanker CoP was produced with an inlet for grouting. Additionally, the Hybridanker CoP could be placed onto the new concrete addition without additional bursting reinforcement. Installation had been done by BBV-Systems GmbH.
THE STRENGTHENING OF THE BUCHERGRABEN BRIDGE
The existing prestressed concrete bridge was strengthened with external wire tendons of DYWIDAG-Systems International GmbH. For the Installation and anchorage of the tendons at the back side of the transversal girders boreholes were executed. Because of the longitudinal inclination of the bridge and the deviation of the external tendons the Hybridanker CoP were produced with a factory-provided inclination. The Hybridanker were tested according to ETAG 013. Therefore load transfer near the webs of the box girder and smaller edge and center distances could be realized compared to design steel anchor plates. Moreover the Hybridanker CoP could be placed onto the existing concrete without additional strengthening methods.
THE STRENGTHENING A PRESTRESSED CONCRETE BRIDGE
The Rettenbach bridge was strengthened with external tendons. For the anchorage of the external tendon forces some concrete blocks needed to be connected to the webs of the box girder. Therefore prestressing bars were applied together with Hybridanker HA. Using Hybridanker allowed reduced edge and center distances and an easy formwork because of the factory-provided inclination. Installation had been done by ANP-Systems GmbH.
THE STRENGTHENING THE RHINE LOCK NEAR IFFEZHEIM
The sill of the lock was strengthened using strand anchors. The load transfer was performed by Hybridanker. Several advantages like high durability, little weight and the possibility to put the Hybridanker directly onto the existing concrete led to the preference of the Hybridanker solution. Installation had been done by DYWIDAG-Systems International GmbH.