Hi all,
I’m at a bit of a loss here in regard to voids under my slab. I’ve recently purchased a house, the house is sitting on a cut and fill site on a sloped block. The retaining wall holding out fill section of the ground has failed and a lot of the ground has slowly decayed with it. To throw an extra spanner in the works the house had “chain drains” which were supposed to be connected to drain pits which would have been blocked for many years prior causing all water run off to go wherever it could. The house is supported by 23 piers that drive through the compacted fill and into solid ground, the house is solid and has no signs of serous structural damage and is holding itself up through the piers and beams, the drainage has been sorted now and the retaining wall is currently to being replaced, but all along the side of the house there are big voids and a hollow sound when you walk on some of the floors. I’ve had most underpinning and undermining slab jacking, resin filling etc company’s say that their services don’t cover what is required, which is a relief but also frustrating as I’m not sure what to do to fix the voids. Do I just fill them back full of soil and move on or should I fix this problem? Any help would be appreciated
House located in north east Melbourne