Abstract
Test embankment work was conducted in peat deposit to clear effect on reduction in secondary consolidation of the vacuum preloading method. The finite element analysis using an elasto-viscoplastic model was also conducted to evaluate the reduced secondary consolidation of peat. The following matters were clarified as a result ; 1) Negative pressure, which was applied during pump operation, was unloaded after the stopping of pumps and caused over consolidation of the ground. 2) The relationship between the overconsolidation ratio (OCR) and the reduction rate of secondary consolidation (R) describes a form close to a hyperbola curve. 3) Secondary consolidation can be controlled by vacuum preloading, and the amount of settlement can be predicted using the relationship between the OCR and R.
