Astuto, Giuseppe (2021) BIO-INDUCED PARTIAL SATURATION AS A LIQUEFACTION MITIGATION TECHNIQUE. [Tesi di dottorato]

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Item Type: Tesi di dottorato
Resource language: English
Title: BIO-INDUCED PARTIAL SATURATION AS A LIQUEFACTION MITIGATION TECHNIQUE
Creators:
CreatorsEmail
Astuto, Giuseppegiuseppe.astuto@unina.it
Date: 2021
Number of Pages: 195
Institution: Università degli Studi di Napoli Federico II
Department: Strutture per l'Ingegneria e l'Architettura
Dottorato: Ingegneria strutturale, geotecnica e rischio sismico
Ciclo di dottorato: 33
Coordinatore del Corso di dottorato:
nomeemail
Rosati, Lucianorosati@unina.it
Tutor:
nomeemail
Flora, AlessandroUNSPECIFIED
Bilotta, EmilioUNSPECIFIED
Date: 2021
Number of Pages: 195
Keywords: Liquefaction, Induced Partial Saturation, Monitoring Techniques
Settori scientifico-disciplinari del MIUR: Area 08 - Ingegneria civile e Architettura > ICAR/07 - Geotecnica
Date Deposited: 25 Apr 2021 19:28
Last Modified: 07 Jun 2023 10:24
URI: http://www.fedoa.unina.it/id/eprint/14037

Collection description

The present work aims to the development of a bio-Induced Partial Saturation (bio IPS) technique able to generate gas bubbles within the pores of the soil and, at the same time, to the development of a reliable monitoring technique. Starting from the identification and isolation of specific microorganisms able to generate gas bubbles, the work aims first at evaluating the capability of the selected microorganisms to nucleate bubbles. Then, the environmental compatibility of the metabolism's products is investigated by performing preliminary chemical and biological tests, in order to verify the applicability of the technique. Successively, with the aim to quantify the amount of generated gas, desaturation tests are carried out for different experimental conditions, monitoring at the same time environmental parameters of interest as well. Once the nucleation process has been widely explored, and the environmental compatibility has been ensured, the experimental setup has been finally focused on possible monitoring techniques able to control and verify the degrees of saturation achieved with the IPS technology. Basically, two possible monitoring parameters have been investigated, i.e. electrical resistivity and P-waves velocity. Their sensitivity to the degree of saturation of a soil will be analysed in detail as it follows, showing that such parameters are well suited to quantify the desaturation level achieved with the bio-IPS technique and, on the other hand, that a delicate interpretation of the data must to be taken into account. It will be highlighted that a combination of the two technologies is likely the best possible monitoring solution.

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