Thanks for all the advice gentlemen. I looked at the structure first hand this weekend. I could not believe what I saw. The house appears to be a total loss. The slabs are cracked on both levels of the house. The garage slabs have been cut out and re-poured in several different places. The back...
The house is on top of a ridge. The grading and compaction plan called for turning the soil down to 6 feet and compaction test every 2 feet. There is a compaction test report that was good for the final grade under the main structure, but there are no reports showing they started at 6 feet deep.
This is a house in the desert in California. It is a Slab-on-grade. The soil is a sandy soil. One cost estimate shows using 22 Push Piers down to 30 feet and Uretek Method of High pressure injection. The house is split level about 3000 sq ft with the garage under part of the house. The cost...
Does the underpinning need to go down to the bedrock?
What about High Density Polyurethane or Deep Injection (DI) Process that employs high density expanding polymers?
What is the best way to repair a bad soil compaction already under a structure? It appears the house was constructed without the soil being compacted correctly.