LI De-ning, LOU Xiao-ming, YANG Min. Experimental researches on unloading resilient deformation properties during excavations in Shanghai area[J]. 2011, 32(S2).
LI De-ning, LOU Xiao-ming, YANG Min. Experimental researches on unloading resilient deformation properties during excavations in Shanghai area[J]. 2011, 32(S2).DOI:
To get the unloading deformation properties of soft ground during excavations in Shanghai area
a series of K0 consolidation and undrained triaxial unloading tests have been carried out to study the unloading deformation properties of soil samples at different bottom depths of a deep excavation in Shanghai under two different unloading stress paths. The relationship of the resilience rate and the resilient modulus with the variation of unloading ratio was analyzed. According to the experimental results
the initial modulus and maximum resilience rate depend on soil properties
but also on the different unloading stress paths
pre-consolidation pressure and so on. And the unloading ratio at which strong resilient deformation of soil occurred is not the same under different unloading paths.