Case Study: Re-leveling Sunken Floors in a Historic Building

Our Solution:

Council approached Resinject for an alternate solution to the full “remove and replace” option. Resinject’s experienced Structural Consultants promptly attended the site and inspected the floors and foundations, and subsequently proposed a more sustainable, cost-effective, and time-efficient slab-jacking solution to treat these sunken floors. To raise and re-level the sunken floors, Resinject proposed a slab-jacking solution consisting of a grid of injection points across the slab area.

In addition to these, a series of stabilising piers were proposed to a depth of 1.5m in the areas experiencing the greatest amount of sinking to improve the load bearing capacity of the ground and counteract any future subsidence, further ensuring the longevity of the re-leveling works.

Resinject’s solution was successful in consolidating and stabilising the underlying ground and providing considerable lift to the sunken areas of flooring. We were able to raise all the effected floor slabs, to mostly within less than 10mm tolerance of the target levels.

The entire service was also completed within four (4) night shifts as well, leaving the facility open during daytime working hours, which minimised the disruption to the public, staff, and council activity schedule for this facility. During the night works, Resinject was able to maintain access for the staff as required as well, due to having such a small work area footprint. Finally, the whole project came in well under budget with Resinject being much less cost compared to the full remove and replace option previously considered.

Resinject-Case-Study_Brisbane-City-Council-Historical-Building-3.pdf