ABSTRACT
Mechanical behavior of large stiffness cantilever steel tubular pile wall embedded in soft rock was investigated by centrifuge model tests under 50g. Two models were prepared with common wall height H=12m and pile diameter Φ=2m, and two embedment depths in soft rock (qu=1.4MPa) dr =2.5m and 3.0m in a prototype scale. Dynamic loadings were first applied to the wall retaining dry sand, and then static loading was simulated by rising water level in the sand. Second series of dynamic loadings were further applied to the wall with the wet sand. It was found that the dr increment of 0.5m could significantly reduce the wall displacement, but increase the moment load and thrust force to the wall, which suggesting the wall structural failure could be a critical condition even for the small dr of about 1.5Φ, especially during the dynamic loading.
