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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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