Evaluation of Liquefaction Potential of Soil at a Power Plant Site in Chittagong, Bangladesh

Soumyadeep Sengupta and Sreevalsa Kolathayar
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Soumyadeep Sengupta: Vellore Institute of Technology, Vellore, India
Sreevalsa Kolathayar: National Institute of Technology Karnataka, Mangaluru, India

International Journal of Geotechnical Earthquake Engineering (IJGEE), 2020, vol. 11, issue 1, 1-16

Abstract: This study presents an evaluation of liquefaction potential for combined cycle power plant site located in the Chittagong district, Bangladesh, using standard penetration test blow counts (SPT-N values). The peak ground acceleration (PGA) values at a bedrock level were estimated deterministically using both linear and point source models as well as different ground motion prediction equations (GMPEs). The surface level hazard was estimated using amplification factors for the soil conditions present and the response spectrum at the center of the plant site was plotted. The liquefaction potential for the site was arrived at by using the SPT-N values of 33 boreholes in the site and at every 3-meter interval from the ground level to a depth of 30 meters. The results from the LPI contours at successive depths indicate that in the majority of the borehole locations, the soil up to 15 meters depth had a significant hazard of liquefaction. These findings from the present study can prove to be crucial from the structural point of view, for any future construction activities in the area.

Date: 2020
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