10-01-2020, 08:36 AM
(09-30-2020, 08:19 PM)Square Wrote: Today I saw a different way of poring the concrete wall. They had rebar installed and instead of a form they were spraying the concrete. Talking about the walls or specifically the retaining walls, why are some all concrete and some are just wood?
Also Tower 2 crane base has rebar and just needs concrete. So based on the last crane that went up 17 days after the concrete was poured, my guess will be October 20 for the 2nd crane to go up.
Shotcrete is very common for structural walls underground against the shoring. Most sites around town that I can think of in the last number of years have done it.
The wooden shoring walls are cheaper and faster, and therefore often the preferred method. By nature they allow a bit of settling of the ground outside (up top) so they are not an option when you're right beside an existing building or something else that cannot be allowed to move. Then they need to use the concrete type.