Liquefaction potential index-based hazard mapping for benghazi sabkha deposits of libya
By: Miftah, Ahmad
.
Contributor(s): Majid Hussain.
Publisher: USA Springer 2022Edition: Vol.52(6), Dec.Description: 1278-1291p.Subject(s): Civil EngineeringOnline resources: Click here
In:
Indian geotechnical journalSummary: Benghazi city is the second largest city in Libya. Rapid and large infrastructural development and related economic activities in the last 20 years have mandated the use of Sabkha soils within the city limits for construction activities. There is a growing need to explore the geotechnical aspects of Sabkha soils including the liquefaction hazard. In this article liquefaction potential index (LPI) has been used for evaluating liquefaction hazards. Standard penetration test data from nearly 95 boreholes, located along the coastline of Benghazi city, has been used in the evaluation. The results of LPI analyses to investigate the surficial manifestations of liquefaction during 5.3, 6.5, and 7 magnitude earthquake scenarios for a peak ground acceleration of 0.18 g are presented in the form of a liquefaction hazard map for Sabkha soils of Benghazi. The map identifies 4 zones (A, B, C, and D) based on LPI. The results indicated that the LPI values of the Benghazi Sabkha deposits represent different levels of liquefaction severity for the above range of earthquake magnitudes. However, the Sabkha deposits displayed severe liquefaction susceptibility for earthquake magnitudes greater than 6. The results showed the severity from low to very high with LPI values ranging between 2 and 15. The results confirm the inherited depositional nature of mixed and layered deposits of Sabkha soils.
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Articles Abstract Database
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School of Engineering & Technology (PG) Archieval Section | Not for loan | 2022-2432 |
Benghazi city is the second largest city in Libya. Rapid and large infrastructural development and related economic activities in the last 20 years have mandated the use of Sabkha soils within the city limits for construction activities. There is a growing need to explore the geotechnical aspects of Sabkha soils including the liquefaction hazard. In this article liquefaction potential index (LPI) has been used for evaluating liquefaction hazards. Standard penetration test data from nearly 95 boreholes, located along the coastline of Benghazi city, has been used in the evaluation. The results of LPI analyses to investigate the surficial manifestations of liquefaction during 5.3, 6.5, and 7 magnitude earthquake scenarios for a peak ground acceleration of 0.18 g are presented in the form of a liquefaction hazard map for Sabkha soils of Benghazi. The map identifies 4 zones (A, B, C, and D) based on LPI. The results indicated that the LPI values of the Benghazi Sabkha deposits represent different levels of liquefaction severity for the above range of earthquake magnitudes. However, the Sabkha deposits displayed severe liquefaction susceptibility for earthquake magnitudes greater than 6. The results showed the severity from low to very high with LPI values ranging between 2 and 15. The results confirm the inherited depositional nature of mixed and layered deposits of Sabkha soils.
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