Fixing accessories, prism for tunnel construction: measuring bolts, adapters, wall bolts
In tunnels, prisms for monitoring deformations are assembled predominantly on convergence adapters. They can either be directly mounted to the reinforcement of the tunnel lining or even fitted subsequently by drilling and gluing.
Alternatively you have the choice between the standard version 5KB with 3/8 inch male thread or the model 5KBW with fixed 12mm LEICA-adapter.
We recommend the use of bolt 5KB including connection adapter 46-VA made of plastic, which has an integrated predetermined breaking point (sacrificial join).
This combination is particularly reliable because even strong mechanical forces are unable to damage the convergence adapter, which is embedded in concrete. If heavy equipment touches the holder or a blasting backfires, the connection adapter would normally break but the bolt and the holder would remain intact.
On construction sites with blasting activities both bolt types could be mounted with protection rings made of steel. In combination with the optionally supplied blind plug, the bolts can be additionally protected against shotcrete!
Alternatively you have the choice between the standard version 5KB with 3/8 inch male thread or the model 5KBW with fixed 12mm LEICA-adapter.
We recommend the use of bolt 5KB including connection adapter 46-VA made of plastic, which has an integrated predetermined breaking point (sacrificial join).
This combination is particularly reliable because even strong mechanical forces are unable to damage the convergence adapter, which is embedded in concrete. If heavy equipment touches the holder or a blasting backfires, the connection adapter would normally break but the bolt and the holder would remain intact.
On construction sites with blasting activities both bolt types could be mounted with protection rings made of steel. In combination with the optionally supplied blind plug, the bolts can be additionally protected against shotcrete!
Made of galvanized steel with solid concrete angedrehtem 12 mm LEICA plug.
The standard bolt galvanized rebar. Our prisms can basically fix only with a connection adapter 46-VA with breaking point on this pin.
Accesoires for Convergence bolt with 3/8" male thread
On construction sites with blasting, our convergence measurement pins are fitted with a protective ring of welded steel. The inclusion of the prism is then absorbed in the ring and is protected effectively from rocks.
With these adapters you can attach each prism with 12 mm LEICA jack on a steel structure.
Made of galvanized steel, mouth width 0-23 mm. With this clip, you can attach your prisms on lattice towers, T-beams, sheet piles, etc
Our wall bolts from the 11R series offer a particularly economical way to install prisms in concrete, rocks or walls when used with the respective adapters.
The "direct" connection between our wall bolts 11R series and all the (tunnel)-prisms with LEICA recording.
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