Estimating Soil Excavation Quantities in caissons?
Estimating Soil Excavation Quantities in caissons?
(OP)
I need to estimate soil excavation quantities from caissons drilled through fill, marine clay, and glacial till to depths of approx 150 feet. How would the hole be drilled? Do I assume a straight shaft or should I consider telescoped casing, and if so, what is the change in hole diameter with length? Thanks!





RE: Estimating Soil Excavation Quantities in caissons?
RE: Estimating Soil Excavation Quantities in caissons?
RE: Estimating Soil Excavation Quantities in caissons?
This manual includes construction procedures and design methods.
I would guess that a contractor would try to use temporary casing through the fill and then use a slurry method through the clay. The glacial till would probably stay open without slurry, but the marine clay above it would usually require some support. If this procedure was used, then the hole would be a constant diameter for its full depth.
Telescoping casing is usually done in 6-inch increments in the USA.