PURPOSE : use specific lifting bags to repear runway
An airport was doing maintenance work on its runway. The work could only be during the night because the runway had to be operational in the morning. It was necessary to remove damaged slabs, reposition a new concrete slab respecting the flatness with others, then grout under it and the morning after the aircraft were able to land safely. Dimension of each concrete slab was 16m x 7m + 0.60m and weight 300 tons.
SOLUTION PROPOSED BY MUSTHANE : CUSTOM LIFTING BAG
We ensured leveling slabs with pneumatic jacks. These specific lifting bags were positioned under the new slab and allowed, according to the inflation pressure, to level the new slab. Furthermore, the inflatable jacks were used in order to obtain a tigh space where grout could be injected. They were then removed and could be reused.
The materials of the inflatable jacks were carefully selected based on environmental constraints (anti-puncture, side inflation, strength..)
Their design allows over 50 uses. The installation tolerances are about 1 mm.