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Centrifugal Numerical Evaluation of Preloading on Polk County Parkway; Final rept
| 题名： | Centrifugal Numerical Evaluation of Preloading on Polk County Parkway; Final rept |
| 作者： | McVay, M. C.; Ahmed, Z. |
| 关键词： | Soil mechanics; Mathematical models; Saturated soils; Soil water; Geotechnical engineering; Pore pressure; Clay soils; Swelling; Florida |
| 摘要： | A mathematical framework for large strain consolidation of fully saturated soil media is presented in this report. The algorithmic treatment of large strain response of the solid phase is based on multiplicative decomposition of deformation gradient and is coupled with the algorithm of fluid flow via the Kirchhoff pore water pressure. Balance laws are written for the soil-water mixture following the motion of the soil matrix alone. Two different constitutive relations (elastoplastic and viscoplastic) based on modified Cam-Clay (MCC) model of critical state soil mechanics are formulated in this report to represent the nonlinear responses of the solid phase. Proposed mathematical model is linearlized to obtain consistent tangent operators and subsequently implemented in a displacement-based finite element code PlasFEM, developed by the Geotechnical Engineering group at the University of Florida. Numerical prediction of primary (consolidation and swell) and secondary (creep) consolidation settlement of phosphatic waste clay, found at the construction site Polk County Expressway, in the presence of vertical wick drains subject to surcharge loading, unloading and subsequent reloading (i.e. road construction) is conducted using PlasFEM. Simulation results showed a very good agreement with the field measurements. |
| 总页数： | 246p |
| 报告类型： | 科技报告 |
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