Showing the work of Piling Contractors Pty Ltd, one of the largest foundation engineering specialists in Australia with a reputation for quality delivery on infrastructure, resources and other construction projects.
I just bought an older tow behind drill rill rig that I was told is for drilling shallow wells and I need more info on because it has solid continuous flight augers, 3" and 2" diameter, two 6' sections of each. They are not hollow for injecting anything down the center of them. It has a single cylinder Wisconsin 6.5 hp motor for the hydraulic assist to raise and lower the drill and a 2 cylinder Wisconsin 18hp motor with some type of transmission made by "Long-Airdox" that the drills are then attached to and driven. Anybody familiar with this? Thanks!
The basement slab normally floats independently. Secant piling will not give a watertight structure, only a water resistant one and ground water will seep through giving damp stains. To make the basement watertight a drainage channel is connected to the drainage system and cast in a strip of concrete on the inside of the secant wall and the basement slab is built against the drainage channel slab. Then a wall is built off the basement slab leaving a sealed drained cavity on the inside face of the secant piled wall.
Seeing that reminds me of how shitty that job was !!! One thing that sticks in my head was the fact of installing rectangular cages in round holes , obviously dreamed up by an engineer with more degrees than a thermometer but no common sense
you drill a pilot hole first then attach reamers which cut to the diameter of the next barrel which also has reamers and the material that is removed by the reamers falls into the pilot hole . lots of tool changing as you have to keep removing spoil from the pilot hole !! It's a slow process
