I'm working on a small residential job on a lake. There is marl to a depth of about 30 ft, sand 30-45 ft, very soft clay (w.o.h.) to 65 ft, then alternating sand and soft clay layers. I'm considering driving closed-end pipe piles to bear in the lower sand and clay layers but am concerned about...
We have a disagreement about how to estimate the pile length for driven piles using AASHTO LRFD.
The AASHTO LRFD says that static analysis should be used to estimate the pile length, even if a load test or other method will be used during production. So to estimate the length:
phi (static) x...
The AASHTO LRFD Bridge manual states (C10.6.2.4.3) "In practice footings on cohesive soils are most likely founded on overconsolidated clays, and settlements can be estimated using elastic theory (Baguelin et al., 1978) or the tangent mdodulus method (Janbu, 1963, 1967). Settlements of footings...
