FIELD: lifting devices.
SUBSTANCE: invention relates to jacking system (1) for concrete structure (2) with lifting rail (10) and lifting mechanism (12) configured for axial movement along lifting rail (10), which has first lifting head (14), second lifting head (16) and linear drive (18) connecting first lifting head (14) and second lifting head (16). Control rod (24) is movable to predetermined positions (18a, 18b) of linear drive (18) of at least one drive mechanism (20, 22) with torque (D).
EFFECT: simplified switching of drive mechanisms in the lifting system.
17 cl, 10 dwg
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