The Experts below are selected from a list of 29457 Experts worldwide ranked by ideXlab platform
Antonio Silva Cardoso - One of the best experts on this subject based on the ideXlab platform.
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embankments on Soft Soil reinforced with stone columns numerical analysis and proposal of a new design method
Geotechnical and Geological Engineering, 2009Co-Authors: Jose Leitao Borges, Tiago Sabino Domingues, Antonio Silva CardosoAbstract:A parametric study of an embankment on Soft Soils reinforced with stone columns is performed using a computer program based on the finite element method. The cylindrical unit cell formulation is used by modeling one column and its surrounding Soft Soil with confined axisymmetric behaviour. The computer program incorporates the Biot consolidation theory (coupled formulation of the flow and equilibrium equations) with constitutive relations simulated by the p–q–θ critical state model. The following parameters are analysed: the replacement area ratio, the deformability of the column material, the thickness of the Soft Soil, the deformability of the fill and the friction angle of the column material. Based on the results of this study, a new design method is proposed, relating the settlement improvement factor to the two factors that revealed major influence: the replacement area ratio and the ratio between the deformability of the Soft Soil and the deformability of the column material.
Victor Choa - One of the best experts on this subject based on the ideXlab platform.
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improvement of ultra Soft Soil using prefabricated vertical drains
Geotextiles and Geomembranes, 2006Co-Authors: Myint Win Bo, Victor ChoaAbstract:Abstract A case study of using prefabricated vertical drains (PVDs) to accelerate the consolidation of an ultra-Soft fine-grained Soil with high moisture content for a land reclamation project is described in this paper. Large-scale laboratory model tests were carried out to assess the suitability of the selected PVD and the effectiveness of the PVD in the consolidation of the ultra-Soft Soil. The model tests indicate that the discharge capacity of the drain can decrease substantially after the drain has experienced large deformations. To overcome this problem, PVDs were installed in two rounds. The first round was before the application of surcharge, and the second round was after substantial settlements have taken place. Field instrumentations were utilized to monitor the performance of PVDs during consolidation. The monitored settlement and pore water pressure results are presented and discussed. The study shows that it is effective to use PVD for the consolidation of the ultra-Soft Soil if special care has been taken in selection and installation of PVD and in fill placement to overcome the difficulties involved in the consolidation of ultra-Soft Soil.
Jose Leitao Borges - One of the best experts on this subject based on the ideXlab platform.
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embankments on Soft Soil reinforced with stone columns numerical analysis and proposal of a new design method
Geotechnical and Geological Engineering, 2009Co-Authors: Jose Leitao Borges, Tiago Sabino Domingues, Antonio Silva CardosoAbstract:A parametric study of an embankment on Soft Soils reinforced with stone columns is performed using a computer program based on the finite element method. The cylindrical unit cell formulation is used by modeling one column and its surrounding Soft Soil with confined axisymmetric behaviour. The computer program incorporates the Biot consolidation theory (coupled formulation of the flow and equilibrium equations) with constitutive relations simulated by the p–q–θ critical state model. The following parameters are analysed: the replacement area ratio, the deformability of the column material, the thickness of the Soft Soil, the deformability of the fill and the friction angle of the column material. Based on the results of this study, a new design method is proposed, relating the settlement improvement factor to the two factors that revealed major influence: the replacement area ratio and the ratio between the deformability of the Soft Soil and the deformability of the column material.
Jin Xu - One of the best experts on this subject based on the ideXlab platform.
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coefficient analysis of Soft Soil consolidation based on measurement of stratified settlement
Geotechnical and Geological Engineering, 2016Co-Authors: Pingyuan Yang, Jiasheng Zhang, Huihua Hu, Xiaoen Wu, Yi Chang, Jin XuAbstract:The coefficient of consolidation is an important parameter for calculating and predicting the consolidation settlement of Soft Soil. In this study, a back analysis method for the coefficient of consolidation is established based on field monitoring results of stratified settlement; the method can calculate both the coefficients of vertical consolidation, cv, and horizontal consolidation, ch, of Soft Soil at different moments. This new method overcomes the problems of traditional methods, which can calculate only one coefficient at a time. The use of the proposed method to determine cv and ch for the drainage consolidation of a thick layer of Soft Soil can compensate for the drawbacks of laboratory testing, which include insufficient consideration of the environmental factors affecting field consolidation, the distortion of experimental results with changes in these factors, and the inability to reasonably determine ch for Soil layers. The new method is theoretically rigorous and reasonable as well as practically feasible in engineering. It is reasonable to use the coefficients of consolidation, back-calculated from the settlement observation data of earlier loading levels (not including the first level of loading), as parameters for consolidation prediction in later stages. In preloading drainage consolidation fields of Soft Soil, which are structurally strong and where obtaining suitable Soil samples is difficult, it is necessary to set a certain number of stratified settlement observation points and use the back analysis of the field monitoring results of stratified settlement to determine the coefficient of Soft Soil consolidation.
Li Ying-min - One of the best experts on this subject based on the ideXlab platform.
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Influence of Soft Soil Layer on Dynamic Characteristic of the Slope
Journal of Chongqing University, 2020Co-Authors: Li Ying-minAbstract:The dynamic finite element method is used to analyzes the influence on dynamic characteristic of the slope by Soft Soil layer.The parameters which influencing the earthquake response of the slope,including the depth,the thickness,the obliquity of Soft Soil layer are analyzed.The influence of Soft Soil layer is obvious,which must be thought over in the analysis of slope stability.The thicker the Soft Soil layer is,the more obvious the filter and the amplitude effect is.The deeper the Soft Soil layer is,the more obvious the filter effect is.The filter effect of the obliquity of the Soft Soil layer to dynamic time history is not obvious.
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The application of geogrid in Soft Soil foundation treatment
2020Co-Authors: Li Ying-minAbstract:The application of geogrid in Soft Soil foundation treatment is elaborated as well as its design and construction methods. Detection results analysis shows this method is simple and convenient in Soft Soil foundation treatment with short limit time and good social and economic benefits.
