Ground response analysis of Kanpur soil along Indo-Gangetic Plains |
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| Institution: | 1. Geological Institute, Russian Academy of Sciences, Moscow, Russia;2. Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia;1. Department of Earth & Environmental Sciences, Pukyong National University, 45, Yongso-ro, Nam-gu, Busan 608-737, Republic of Korea;2. Lithosphere Tectonics and Mechanics, Institut de Physique du Globe de Paris, 1 rue Jussieu, 75005 Paris, France;3. Geologic Research Division, Korea Institute of Geoscience and Mineral Resources, 124, Gwahang-no, Yuseong-gu, Daejeon 305-350, Republic of Korea;1. ENGEO Incorporated, San Ramon, CA;2. Department of Civil, Architectural and Environmental Engineering, The University of Texas, Austin, TX;1. Korea Institute of Geoscience and Mineral Resources, 124 Gwahang-no, Yuseong-gu, Daejeon 305-350, Republic of Korea;2. Korea Basic Science Institute, Chungbuk 363-883, Republic of Korea;3. Kangwon National University, Chuncheon 200-701, Republic of Korea;4. Korea International Cooperation Agency, Gyeonggi, Republic of Korea;1. Department of Earth and Environmental Sciences, Korea University, Seoul, 02841, Republic of Korea;2. Department of Geological Science, Pusan National University, Busan, 46241, Republic of Korea;3. School of Earth and Environmental Sciences, Seoul National University, Seoul, 08826, Republic of Korea;4. Department of Earth Science Education, Chonnam National University, Gwangju, 61186, Republic of Korea |
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| Abstract: | The present work deals with 1D and 2D ground response analysis and liquefaction analysis of alluvial soil deposits from Kanpur region along Indo-Gangetic plains. Standard penetration tests and seismic down hole tests have been conducted at four locations namely IITK, Nankari village, Mandhana and Bithoor at 1.5 m interval up to a depth of 30 m below the ground surface to find the variation of penetration blows and the shear wave velocity along the depth. From the selected sites undisturbed as well as representative soil samples have been collected for detailed soil classification. The soil profiles from four sites have been considered for 1D and 2D ground response analysis by applying the free field motions of three Himalayan earthquakes namely Chamba earthquake (Mw—5.1), Chamoli earthquake (Mw—6.4) and Uttarkashi earthquake (Mw—6.5). An average value of Peak Ground Acceleration (PGA) obtained from 1D and 2D analysis is considered for liquefaction analysis and post-liquefaction settlement. The excess pore water pressure ratio is greater than 0.8 at a depth of 24 m from ground surface for IITK, Nankari village, Bithoor sites. More than 50% of post liquefaction settlement is contributed by layers from 21–30 m for all sites. In general, the soil deposits in Kanpur region have silty sand and sand deposits and are prone to liquefaction hazards due to drastic decrease of cyclic resistance ratio (CRR) at four chosen sites in Kanpur. |
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| Keywords: | Liquefaction Ground response analysis Peak ground acceleration CSR CRR |
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