Location
Chicago, Illinois
Date
04 May 2013, 10:30 am - 11:30 am
Abstract
This paper presents a case study of liquefaction potential assessment carried out under an earth dam foundation in Tunisia. An emphasis was made on the exploration of geotechnical conditions and the interpretation of field tests results collected before and after soil densification using the vibrocompaction technique. The assessment of soil liquefaction susceptibility was made using deterministic and probabilistic simplified procedures developed from several case histories. Conclusively, the obtained results show that before vibrocompaction the soil was prone to the liquefaction hazard. However, after vibrocompaction, a significant improvement of the soil resistance reduces the liquefaction potential of the sandy foundation. Indeed, before vibrocompaction, the factor of safety (FS) drops below 1 which means that the soil is susceptible for liquefaction. However, after vibrocompaction, the values of FS exceed the unit which justify the absence of liquefaction hazard in the dam foundation. In addition, before soil densification, the liquefaction evaluation using CPT-data shows probabilities values over 65 % which correspond to the classes of ‘’very likely’’ and ‘’Almost certain that will be liquefy’’ in the field case histories classification. The treated site presents low probability of liquefaction (less than 35%) indicating a low likelihood of liquefaction of the dam foundation.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
7th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 2013 Missouri University of Science and Technology, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Guettaya, Ikram and El Ouni, Mohamed Ridha, "Evaluation of Liquefaction Potential of an Earth Dam Foundation Using In Situ Tests" (2013). International Conference on Case Histories in Geotechnical Engineering. 15.
https://scholarsmine.mst.edu/icchge/7icchge/session04/15
Evaluation of Liquefaction Potential of an Earth Dam Foundation Using In Situ Tests
Chicago, Illinois
This paper presents a case study of liquefaction potential assessment carried out under an earth dam foundation in Tunisia. An emphasis was made on the exploration of geotechnical conditions and the interpretation of field tests results collected before and after soil densification using the vibrocompaction technique. The assessment of soil liquefaction susceptibility was made using deterministic and probabilistic simplified procedures developed from several case histories. Conclusively, the obtained results show that before vibrocompaction the soil was prone to the liquefaction hazard. However, after vibrocompaction, a significant improvement of the soil resistance reduces the liquefaction potential of the sandy foundation. Indeed, before vibrocompaction, the factor of safety (FS) drops below 1 which means that the soil is susceptible for liquefaction. However, after vibrocompaction, the values of FS exceed the unit which justify the absence of liquefaction hazard in the dam foundation. In addition, before soil densification, the liquefaction evaluation using CPT-data shows probabilities values over 65 % which correspond to the classes of ‘’very likely’’ and ‘’Almost certain that will be liquefy’’ in the field case histories classification. The treated site presents low probability of liquefaction (less than 35%) indicating a low likelihood of liquefaction of the dam foundation.
