There are a number of variables to consider when looking at a foundation problem. Unfortunately, there is no such things as a 'one size fits all foundation repair'. As a result, taking a scientific approach to the repair plan will help ensure the solution not only hit the target, but that it hits the right target. Even with all of that preparation, foundation investigations and peer review, there are still challenges that arise.
When I say 'Challenging Foundation Repair Project', I mean challenging on several levels, physically, mentally, financially, and logistically. This was also an opportunity.
This week we finished up one of the most challenging foundation repair projects that I’ve had in my career to date. Now, when I say 'Challenging Foundation Repair Project', I mean challenging on several levels, physically, mentally, financially, and logistically. This was also an opportunity.
Topo of the floor elevation
In 2004, I pioneered the concept of lowering houses that sit on post-tension slabs that were heaved up from expansive soils. This process consists of underpinning the high areas on the perimeter with helical piers to hold it in place. Then using a variety of excavation techniques such as air knives and vacuum excavation we remove the soil and lower it leaving a gap for future heave.
Schematic of the work plan on this particular house.
The Yellow areas are grout socks. Tubular fabric filled with concrete. The edges are sealed with cement board and 20 mill plastic sheeting. Once it is sealed up the dry conditions are maintained by the MoistureLevel sub slab depressurization system. The dark blue areas are left open to absorb any future heave.
We were on this job for almost 4 months….. why so long? Stay tuned for the next part of the story.