dsergison
Diamond
- Joined
- Oct 23, 2003
- Location
- East Peoria, IL, USA
I hacked together a small slab jacking injector.
2" hyd cyl at 3k psi over an 8" mud piston gives about 180 psi of mud pressure.
(I set the relief of my hydraulic power pack to 3000 psi to protect the injector)
it pushes about 4 gallons at a stroke through a 7/8" drilled hole.
the normal jacking mud mix I read about is about 9 parts of sandy soil, 1 part cement, 1 part fly ash. With the purpose of not washing out or shrinking much when drying but still being able to dig through it in the future.
I did not make a real mix, last night I just pumped muddy black topsoil to test it out.
2" hyd cyl at 3k psi over an 8" mud piston gives about 180 psi of mud pressure.
(I set the relief of my hydraulic power pack to 3000 psi to protect the injector)
it pushes about 4 gallons at a stroke through a 7/8" drilled hole.
the normal jacking mud mix I read about is about 9 parts of sandy soil, 1 part cement, 1 part fly ash. With the purpose of not washing out or shrinking much when drying but still being able to dig through it in the future.
I did not make a real mix, last night I just pumped muddy black topsoil to test it out.