Product specifications

User information Doka heavy-duty supporting system SL-1
11999759002 - 06/2008 Ü
The Formwork Experts
Tunnel structures built using underground construction
methods
Particularly in the building of tunnels using under-
ground construction methods, the formwork has to
feature large lowering distances and leave as much
space as possible for the site crew.
These special requirements are met by the combi-
nation of Multi-purpose walings SL-1 WU 16 and
Spindle struts SL-1 T16.
Required product features:
● high permitted loads, meaning
- large influence widths
- small number of parallel frame sections / wal-
ing levels
- ample space for the operators
● large lowering distance for easy cleaning
● easy-to-operate, hydraulically operated form-
work
● minimal erection work
Operational steps after pouring
➤ Take out the ground anchors.
Striking formwork from walls
➤ To take the load off the spindle struts, strike the
wedge of the lowering shoe with a hammer.
➤ Pull the Fastening pins T16 out of the telescopic
spindle struts.
➤ Retract the wall formwork by means of the
hydraulic cylinder.
Cleaning the tunnel-crown formwork
Lowering the heavy-duty supporting units
➤ See "Lowering the heavy-duty supporting units"
Folding down the tunnel formwork
➤ Depending on the arrangement of the super-
structure, it may be necessary to detach the over-
head diagonal bracing of the Spindle struts SL-1
T16.
➤ Raise the tunnel-crown formwork max. 5 mm by
hydraulic cylinder.
This takes the pressure off the spindle struts.
➤ Pull the Fastening pins T16 out of the telescopic
spindle struts.
➤ Lower the formwork units by hydraulic cylinder,
on alternate sides, and clean them.
Repositioning the heavy-duty supporting units
➤ See "Repositioning using heavy-duty rollers" or
"Repositioning using Chain travelling unit SL-1"
A Ground anchor
B Lowering shoe SL-1
C Spindle strut SL-1 T16
D Hydraulic cylinder
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A
B
C
D
Make sure that there is enough clearance
for the diagonal bracing while it changes
position.
C Spindle strut SL-1 T16
D Special hydraulic cylinder with lowering brake valve
E Diagonal bracing
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E
C
D
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