![Had a retaining wall done. They used this rock to backfill. Problem is that the sono tubes became loose because it hasn't fully settled and it's a little larger rock. I'd like Had a retaining wall done. They used this rock to backfill. Problem is that the sono tubes became loose because it hasn't fully settled and it's a little larger rock. I'd like](https://preview.redd.it/x5zx962z2nd71.jpg?width=640&crop=smart&auto=webp&s=bdf148cb5208f88bc7b4c3d7db27bb1ab083edfe)
Had a retaining wall done. They used this rock to backfill. Problem is that the sono tubes became loose because it hasn't fully settled and it's a little larger rock. I'd like
Darrells contribution, the 10" Sono Tube is put in place, white sand is poured into the void between the sonotube and the sonotube containing the concrete. Worked well.... - Fraser Valley Astronomers
![Plumbatube a Concrete Pier 12" Alignment Tool-fits Most 12" Diameter Tubes : Amazon.co.uk: DIY & Tools Plumbatube a Concrete Pier 12" Alignment Tool-fits Most 12" Diameter Tubes : Amazon.co.uk: DIY & Tools](https://m.media-amazon.com/images/I/A1v0+Yo3urL._AC_SL1500_.jpg)