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Liquefaction Assessment of Gulf of Kutch Offshore Soils Using CPTU Data
The Kutch area in the state of Gujarat, India, is a zone 5 earthquake region as per IS 1893 (Part 1): (2016). This area has been seismologically active and the Bhuj (2001) earthquake also confirms this. Notably, liquefaction at many locations was observed during this earthquake. In recent times, offshore infrastructure such as wellhead platforms and pipelines is being developed in this region to produce hydrocarbons. The general soil stratigraphy of the offshore region has a mix of clay, silt and sand layers. In the case of seismic activity, the pore pressure increases in the soil with subsequent loss of stiffness and/or strength. It is well established in the literature that the CPTU (Cone Penetration Testing with Pore Pressure Measurement) based methods of liquefaction assessment are more reliable compared to other methods based on laboratory tests because of the difficulties in collecting the undisturbed soil samples, especially for sands. This paper presents the results of liquefaction assessment carried out for the Gulf of Kutch offshore soils using the CPTU data.
Liquefaction Assessment of Gulf of Kutch Offshore Soils Using CPTU Data
The Kutch area in the state of Gujarat, India, is a zone 5 earthquake region as per IS 1893 (Part 1): (2016). This area has been seismologically active and the Bhuj (2001) earthquake also confirms this. Notably, liquefaction at many locations was observed during this earthquake. In recent times, offshore infrastructure such as wellhead platforms and pipelines is being developed in this region to produce hydrocarbons. The general soil stratigraphy of the offshore region has a mix of clay, silt and sand layers. In the case of seismic activity, the pore pressure increases in the soil with subsequent loss of stiffness and/or strength. It is well established in the literature that the CPTU (Cone Penetration Testing with Pore Pressure Measurement) based methods of liquefaction assessment are more reliable compared to other methods based on laboratory tests because of the difficulties in collecting the undisturbed soil samples, especially for sands. This paper presents the results of liquefaction assessment carried out for the Gulf of Kutch offshore soils using the CPTU data.
Liquefaction Assessment of Gulf of Kutch Offshore Soils Using CPTU Data
Lecture Notes in Civil Engineering
Satyanarayana Reddy, C. N. V. (editor) / Saride, Sireesh (editor) / Haldar, Sumanta (editor) / Harsha Gamidi, Sri (author)
2021-08-03
13 pages
Article/Chapter (Book)
Electronic Resource
English
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