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Title:Empirical correlation between the shear-wave velocity and the dynamic probing heavy test : case study, Varaždin, Croatia
Authors:Strelec, Stjepan (Author)
Stanko, Davor (Author)
Gazdek, Mario (Author)
Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru (Authorship owner)
Files:.pdf Acta_Geotechnica_Slovenica_2016_Strelec,_Stanko,_Gazdek_Empirical_correlation_between_the_shear-wave_velocity_and_the_dynamic_probing_he.pdf (1,34 MB)
 
URL http://fgserver3.fg.um.si/journal-ags/2016-1/article-1.asp
 
Language:English
Work type:Scientific work (r2)
Typology:1.01 - Original Scientific Article
Organization:FGPA - Faculty of Civil Engineering, Transportation Engineering and Architecture
Abstract:Varaždin is located in the north-western part of Croatia in shallow quaternary alluvial sediments of the Drava River basin. Local site effects due to the alluvial soft sediments can play a crucial role in the amplification of seismic-wave ground motions. The shear-wave velocity (VS) is one of the most important parameters for determining dynamic soil properties and ground-response analyses. The seismic surface wave method (MASW) is the simplest and a very efficient way of measuring the shear-wave velocity in the field. The Dynamic Probing Heavy (DPH) test is suited to determining the soil strength and the soil deformation properties. However, there are a lack of correlations between the shear-wave velocity and the DPH tests (VS - NDPH) in the literature. In this paper we present empirical correlations between the shear-wave velocity VS and the soil penetration resistance NDPH with: a) raw (original) NDPH data: VS = 97.839·NDPH0.395, (R2 = 0.723); b) a groundwater correction NDPH data: VS = 92.998·NDPH0.363 (R2 = 0.815). From the measured DPH data, the shear-wave velocity (VS), the shear modulus (Go) and the Young’s modulus (Eo and Er) were estimated. Two different approaches (low vs. high strain) were compared, and the results were found to be in good agreement when the relative difference between the velocities is small and smooth. Dynamic probing tests are good for studying a discrete point of interest in a large field area based on preliminary seismic tests. The suggested correlation VS - NDPH can be used for a rough estimation of VS from NDPH (they are site-specific, and so not applicable worldwide). In this way valuable information about dynamic soil properties can be extracted for ground-response analyses and the study of local site effects.
Keywords:shear-wave velocity, MASW, DPH, empirical correlations, dynamic elastic moduli, dynamic soil properties
Year of publishing:2016
Number of pages:str. 3-15
Numbering:št. 1, Letn. 13
ISSN:1854-0171
UDC:624.13
ISSN on article:1854-0171
NUK URN:URN:SI:UM:DK:BCHQQLKK
Copyright:Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru
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Record is a part of a journal

Title:Acta geotechnica Slovenica
Shortened title:Acta geotech. Slov.
Publisher:Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru
ISSN:1854-0171
COBISS.SI-ID:215987712 New window

Secondary language

Language:Slovenian
Title:Empirična korelacija med hitrostjo strižnega valovanja in dinamičnim penetracijskem preizkusom : študija primera, Varaždin, Hrvaška
Abstract:Varaždin se nahaja v severozahodnem delu Hrvaške na mestu plitvih kvartarnih aluvialnih sedimentov reke Drave. Aluvialni mehki sedimenti lahko igrajo ključno vlogo pri ojačanju gibanja potresnih valov v tleh. Hitrost strižnega valovanja (VS) je eden izmed najbolj pomembnih parametrov za določanje dinamičnih lastnosti tal in analizo odziva tal. Metoda seizmičnega površinskega valovanja (MASW) je najenostavnejši in zelo učinkovit način za merjenje hitrosti strižnega valovanja na terenu. Dinamični penetracijski preizkus (DPH) je primeren za določanje parametrov trdnosti in deformacijskih lastnosti tal. V literaturi manjkajo korelacije med hitrostmi strižnega valovanja in preizkusi DPH (VS - NDPH). V tem prispevku predstavljamo empirične korelacije med hitrostmi strižnega valovanja VS penetracijskim odporom NDPH za: a) neobdelane (originalne) NDPH podatke: VS = 97.839·NDPH0.395, (R2 = 0.723); b) podatke NDPH s korekcijo za talno vodo: VS = 92.998·NDPH0.363 (R2 = 0.815). Iz izmerjenih podatkov DPH so bili ocenjeni hitrost strižnega valovanja (VS), strižni modul (Go) in Youngova modula (Eo in Er). Primerjali smo dva različna pristopa (za majhno in veliko deformacijo), iz rezultatov pa smo ugotovili, da se dobro ujemajo, ko je relativna razlika med hitrostmi majhna in gladka. Dinamični penetracijski preizkusi so dobri za preučevanje točno določene točke v velikem polju območja, ki temelji na predhodnih seizmičnih preizkusih. Predlagana korelacija VS - NDPH se lahko uporablja za grobo oceno VS iz NDPH (vrednosti so specifične za prikazano lokacijo, zato se ne morejo uporabljati splošno). Na ta način so lahko pridobljene koristne informacije o dinamičnih lastnostih tal za analizo odziva tal in študij lokalnih vplivov.
Keywords:hitrost strižnega valovanja, MASW, DPH, empirične korelacije, dinamični elastični moduli, dinamične lastnosti tal


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