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    Comparative Study of CPTU and SDMT in Liquefaction-Prone Silty Sands with Ground Improvement

    Source: Journal of Geotechnical and Geoenvironmental Engineering:;2022:;Volume ( 148 ):;issue: 006::page 04022038
    Author:
    Sara Amoroso
    ,
    Maria F. García Martínez
    ,
    Paola Monaco
    ,
    Laura Tonni
    ,
    Guido Gottardi
    ,
    Kyle M. Rollins
    ,
    Luca Minarelli
    ,
    Diego Marchetti
    ,
    Kord J. Wissmann
    DOI: 10.1061/(ASCE)GT.1943-5606.0002801
    Publisher: ASCE
    Abstract: Following the 2012 Emilia-Romagna seismic sequence, widespread liquefaction of silty sands was observed, providing the opportunity to enhance our knowledge of the influence of fines content on seismic hazard and mitigation works. This paper presents the results of a thorough geotechnical investigation performed in connection with full-scale controlled blast tests in Bondeno, Italy, a small village that suffered liquefaction in 2012. Piezocone (CPTU) and seismic dilatometer (SDMT) tests were performed in natural and improved soils after rammed aggregate pier (RAP) treatment to a depth of 9.5 m to provide accurate soil characterization, evaluate liquefaction, and verify the effectiveness of the ground improvement. The combined use of piezocone (CPTU) and flat dilatometer (DMT) data provided reliable estimates of the overconsolidation ratio and at-rest earth pressure coefficient and highlighted the soil improvement in silty sands between 4 and 9 m in depth. Shear-wave velocity measurements showed a low sensitivity to RAP installation. The treatment effectiveness was also confirmed by the use of the simplified procedures for liquefaction assessment, underlining the important influence of the adopted fines profile and by the blast-induced liquefaction. CPTU and DMT parameters remained approximately unchanged between the piers after the detonation.
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      Comparative Study of CPTU and SDMT in Liquefaction-Prone Silty Sands with Ground Improvement

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4283631
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    contributor authorSara Amoroso
    contributor authorMaria F. García Martínez
    contributor authorPaola Monaco
    contributor authorLaura Tonni
    contributor authorGuido Gottardi
    contributor authorKyle M. Rollins
    contributor authorLuca Minarelli
    contributor authorDiego Marchetti
    contributor authorKord J. Wissmann
    date accessioned2022-05-07T21:21:39Z
    date available2022-05-07T21:21:39Z
    date issued2022-03-29
    identifier other(ASCE)GT.1943-5606.0002801.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4283631
    description abstractFollowing the 2012 Emilia-Romagna seismic sequence, widespread liquefaction of silty sands was observed, providing the opportunity to enhance our knowledge of the influence of fines content on seismic hazard and mitigation works. This paper presents the results of a thorough geotechnical investigation performed in connection with full-scale controlled blast tests in Bondeno, Italy, a small village that suffered liquefaction in 2012. Piezocone (CPTU) and seismic dilatometer (SDMT) tests were performed in natural and improved soils after rammed aggregate pier (RAP) treatment to a depth of 9.5 m to provide accurate soil characterization, evaluate liquefaction, and verify the effectiveness of the ground improvement. The combined use of piezocone (CPTU) and flat dilatometer (DMT) data provided reliable estimates of the overconsolidation ratio and at-rest earth pressure coefficient and highlighted the soil improvement in silty sands between 4 and 9 m in depth. Shear-wave velocity measurements showed a low sensitivity to RAP installation. The treatment effectiveness was also confirmed by the use of the simplified procedures for liquefaction assessment, underlining the important influence of the adopted fines profile and by the blast-induced liquefaction. CPTU and DMT parameters remained approximately unchanged between the piers after the detonation.
    publisherASCE
    titleComparative Study of CPTU and SDMT in Liquefaction-Prone Silty Sands with Ground Improvement
    typeJournal Paper
    journal volume148
    journal issue6
    journal titleJournal of Geotechnical and Geoenvironmental Engineering
    identifier doi10.1061/(ASCE)GT.1943-5606.0002801
    journal fristpage04022038
    journal lastpage04022038-18
    page18
    treeJournal of Geotechnical and Geoenvironmental Engineering:;2022:;Volume ( 148 ):;issue: 006
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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