excavation

You can also use trenchless excavation like tunneling, but that’s a topic for another video.

Rock bolts are a type of reinforcement for stabilizing rock excavations, usually made from steel bars or bolts.

On today’s episode we’re talking how engineers stabilize tunnel excavations to keep them from collapsing.

Then other construction projects nearby began, including the adjacent Transbay Transit Center, which required their own deep excavations and groundwater drawdowns.

In the 1970s, a collaboration between archaeologists and the Makah Tribe in the Pacific Northwest proved that respectful excavations could be successful.

The end of the tube stays below the top of the concrete as it fills the excavation, preventing the water from washing away the aggregate and diluting the cement.