Comparative Study of CPTU and SDMT in Liquefaction-Prone Silty Sands with Ground ImprovementSource: Journal of Geotechnical and Geoenvironmental Engineering:;2022:;Volume ( 148 ):;issue: 006::page 04022038Author: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.1943-5606.0002801Publisher: 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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contributor author | Sara Amoroso | |
contributor author | Maria F. García Martínez | |
contributor author | Paola Monaco | |
contributor author | Laura Tonni | |
contributor author | Guido Gottardi | |
contributor author | Kyle M. Rollins | |
contributor author | Luca Minarelli | |
contributor author | Diego Marchetti | |
contributor author | Kord J. Wissmann | |
date accessioned | 2022-05-07T21:21:39Z | |
date available | 2022-05-07T21:21:39Z | |
date issued | 2022-03-29 | |
identifier other | (ASCE)GT.1943-5606.0002801.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4283631 | |
description 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. | |
publisher | ASCE | |
title | Comparative Study of CPTU and SDMT in Liquefaction-Prone Silty Sands with Ground Improvement | |
type | Journal Paper | |
journal volume | 148 | |
journal issue | 6 | |
journal title | Journal of Geotechnical and Geoenvironmental Engineering | |
identifier doi | 10.1061/(ASCE)GT.1943-5606.0002801 | |
journal fristpage | 04022038 | |
journal lastpage | 04022038-18 | |
page | 18 | |
tree | Journal of Geotechnical and Geoenvironmental Engineering:;2022:;Volume ( 148 ):;issue: 006 | |
contenttype | Fulltext |