Once you complete the injection process won’t the water simply go away?
Will we have to case our piers if we use water pressure injection?
How expansive are the soils in DFW?
What other construction methods are used to negate the effects of swelling soils?
There are many options available. Typically the most expensive options are pier and beam type foundations followed by a fully suspended slab.
The second most expensive choice for soil remediation is to replace in-situ soils with select fill or base material. However, owners should be made aware that if expansive clay soils are outside the excavation area, a bathtub effect can be created. This occurs when water is allowed to infiltrate the low PI soils and settle down on top of the expansive clay creating deep seated swell. Moisture conditioning by excavation and recompaction is the next cheapest solution followed by the most economical option which is water pressure injection.