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Lessons Learned from Applications for Clays - Coggle Diagram
Lessons Learned from Applications for Clays
Model Calibration & Validation
Based on resedimented Boston Blue Clay (rBBC) analog material
Laboratory tests (CRS, CKoUC, CKoUE, DSS, DSC
Comparison with MCC -> MIT-E3 captures anisotropy & strain softening
Field Applications
Deep Excavations (Boston)
Class A/C predictions
effects of preloading on pore pressure response
Stages embankment construction
Saint Alban Test Embankment
I-95 Test Fill (Boston Blue Clay)
Accurate stability prediction under stages loading
Time-Dependent Behavior
Osaka Bay & Pisa clays - scaling of secondary compression
MIT-SR model reproduces creep strain rate behavior
Key findings
Undrained strength anisotropy
stiffness degradation and recovery upon reversal of stress path
Overconsolidated clays (bounding surface behavior)
Engineering Implications
Calibration with lab & field data critical
Model parsimony preferred over excessive complexity
Intergrating creep and consolidation enhances design accuracy
Performance Insights
Advanced models yield better stability & deformation predictions
Finite Element Limit Analysis (FELA)
Critical role of ansiotropy and microstructural destructuring