When a warehouse or a commercial building is suffering from sinking floors and subsidence, the business concerned will look for the most appropriate method of treatment that can resolve the problem in a way that keeps disruption to its employees, customers and the business overall to a minimum and in the most economical way possible.
To make the most informed decision, it is important to commission a ground investigation survey upon which to base the choice of treatment. The survey can look at a variety of points. It can establish soil composition, the load-bearing capacity of the ground, the impact of the volume of water in the soil and the depth and condition of the existing foundations and the slab. These are vital to being able to narrow down which of the subsidence treatments available – underpinning, piling, or a more modern method, geopolymer resin injection – is the most suitable option.
The most appropriate treatments will vary from project to project. No one subsidence treatment solution can be said to be the silver bullet and the only choice for every situation. All the factors determined by the ground survey must be considered. These may rule out the use of techniques that would otherwise be specified based purely on basic assumptions about building loadings and depth of foundations and expected soil conditions.
Once the choice of viable subsidence treatments is established, the impact of each method on the running of the business during its implementation can be assessed. This will enable the selection of a solution that balances the business needs, the level and duration of disruption and remedial actions required following the completion of the work with the benefits of the treatment itself.