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Effect of Smear, Well Resistance, and Stiffness on the Performance of Stone Column during Soil Liquefaction
During earthquakes, many structures fail due to the liquefaction of saturated sand or silt. Installation of the stone column is one of the most adopted ground improvement methods used to minimize the damage caused by soil liquefaction. During the installation of the stone column, the permeability of the soil at the vicinity of the column may reduce due to densification. The available analytical solutions to determine the performance of stone columns are developed based on the infinite permeability of the stone columns and without considering the stiffness of columns. Thus, in this paper, an approach has been presented to evaluate the generation and dissipation of excess pore water pressure considering smear effect, well resistance, and stiffness of stone column. The effects of various important parameters of smear zone and stone column on the mitigation of soil liquefaction are evaluated and demonstrated in the results. Obtained results demonstrate that the reduction of the permeability of smear zone increases the pore pressure ratio by around 20% and reduction of the permeability of stone column further increases the peak value of excess pore pressure ratio by 18% to 71%. It is also observed that due to increase in compressibility ratio, the peak value of excess pore pressure ratio is decreased.
Effect of Smear, Well Resistance, and Stiffness on the Performance of Stone Column during Soil Liquefaction
During earthquakes, many structures fail due to the liquefaction of saturated sand or silt. Installation of the stone column is one of the most adopted ground improvement methods used to minimize the damage caused by soil liquefaction. During the installation of the stone column, the permeability of the soil at the vicinity of the column may reduce due to densification. The available analytical solutions to determine the performance of stone columns are developed based on the infinite permeability of the stone columns and without considering the stiffness of columns. Thus, in this paper, an approach has been presented to evaluate the generation and dissipation of excess pore water pressure considering smear effect, well resistance, and stiffness of stone column. The effects of various important parameters of smear zone and stone column on the mitigation of soil liquefaction are evaluated and demonstrated in the results. Obtained results demonstrate that the reduction of the permeability of smear zone increases the pore pressure ratio by around 20% and reduction of the permeability of stone column further increases the peak value of excess pore pressure ratio by 18% to 71%. It is also observed that due to increase in compressibility ratio, the peak value of excess pore pressure ratio is decreased.
Effect of Smear, Well Resistance, and Stiffness on the Performance of Stone Column during Soil Liquefaction
Pal, Suravi (author) / Deb, Kousik (author)
Eighth International Conference on Case Histories in Geotechnical Engineering ; 2019 ; Philadelphia, Pennsylvania
Geo-Congress 2019 ; 413-421
2019-03-21
Conference paper
Electronic Resource
English
| British Library Conference Proceedings | 2019
Effect of clogging of stone column on drainage capacity during soil liquefaction
| British Library Online Contents | 2019
Effect of clogging of stone column on drainage capacity during soil liquefaction
| British Library Online Contents | 2019