有限要素法을 이용한 過壓密粘土의 壓密沈下豫測 = Prediction of consolidation settlements of overconsolidated clays by using the finite element method

다국어 초록 (Multilingual Abstract)

Consolidation is the time-dependent settlement of soils resulting from the expulsion of water from the soil pores. When a saturated compressible clay layer is subjected to a stress increase, consolidation settlement occurs greatly. Because the hydraulic conductivity of clay is significantly small, the excess pore water pressure generated by loading gradually dissipates over a long period. The settlement caused by consolidation in clay may be several times greater than the immediate settlement. A number of researches are carried out to predict the consolidation behavior in field, however, most of researches show the discrepancies between the prediction and the field settlement data. Therefore, the estimation of consolidation rate is one of the important factors in the construcion on soft clayey deposits.
In this paper, laboratory tests have analyzed to apply accurately the soil parameters that executed the plan of stage construction. This study analyzes consolidation behavior of overconsolidated clay with two-dimensional consolidation analysis program by use of the numerical method. By using this program, the time dependent consolidation behavior of soft deposits can be analyzed appropriately. Elastic and elastic-plastic finite element analysis are compared with Terzaghi's theory of one-dimensional consolidation.