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http://hdl.handle.net/2122/11397
Authors: | Amoroso, Sara* Lehane, B. M.* Fahey, M.* |
Title: | Determining G-gamma decay curves in sand from a Seismic Dilatometer Test (SDMT) | Issue Date: | 2013 | Keywords: | G-γ decay curves, Seismic Dilatometer Test | Abstract: | This paper investigates the use of the Seismic Dilatometer Test (SDMT) for the determi- nation of in situ decay curves of sand stiffness with strain level (G-γ curves or similar). In situ, laboratory and field data (including footing and self-boring pressuremeter tests) obtained at a silica sand site and a calcareous sand site in Western Australia are used for this investigation. The approach adopted relies on the ability of SDMT to provide a small strain modulus (G from Vs), a “working strain” modulus (G from M tentatively constructed by fitting curves through these three points. The approach is based on the premise that M et al. 2008), while M dilatometer, derived using Lehane & Fahey (2004). The paper illustrates the potential of using the SDMT to obtain in situ G-γ decay curves, but also indicates that additional research is required to improve the 0 DMT ) and an “operational strain” modulus (G from M ). Thus, in situ G-γ decay curves are DMT DV DV is a reasonable estimate of the working strain modulus (e.g. Monaco et al. 2006 and Marchetti is a modulus operating at the settlement ratio s/B of 1.8%, applied by the flat DMT DV reliability of the proposed approach. |
Appears in Collections: | Conference materials |
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Amoroso Lehane & Fahey 2012 ISC'4.pdf | 1.16 MB | Adobe PDF |
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