TY - JOUR
T1 - Subgrade assessment using automated dynamic cone penetrometer to manage geo-infrastructures
AU - Kim, Sang Yeob
AU - Lee, Jong Sub
AU - Hong, Won Taek
N1 - Funding Information:
This work was supported by the Gachon University research fund of 2019 (GCU-2019-0806).
Funding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2018R1D1A1B07048182).
Publisher Copyright:
© 2021 Techno Press. All rights reserved.
PY - 2021/5
Y1 - 2021/5
N2 - For the efficient management of geo-infrastructures in the field, engineering properties of the subgrade should be reliably and rapidly investigated. The objective of this study is to estimate and compare the strength and stiffness parameters of subgrades using portable in-situ devices. An automated dynamic cone penetrometer (ACP), dynamic cone penetrometer (DCP), and light falling weight deflectometer (LFWD) are adopted and applied at nine points of soft ground in South Korea. The Nvalue from the ACP (NACP), which efficiently assesses the relatively deep subgrade, is correlated with the dynamic cone penetration index (DCPI) and dynamic deflection modulus (Evd). Test results show that the DCPI and Evd can be estimated in terms of NACP. In particular, the relationship between Evd and NACP is improved when the strain influence factor of the target ground is considered. For the assessment of strength and stiffness parameters, the California bearing ratio (CBR), relative density (Dr), internal friction angle (φ), and elastic moduli determined by the plate loading test (PLT), soil stiffness gauge (SSG), falling weight deflectometer (FWD) are estimated using NACP. The ACP test with the relationships between engineering parameters and NACP may be an effectively method to assess the overall characteristics of the subgrade.
AB - For the efficient management of geo-infrastructures in the field, engineering properties of the subgrade should be reliably and rapidly investigated. The objective of this study is to estimate and compare the strength and stiffness parameters of subgrades using portable in-situ devices. An automated dynamic cone penetrometer (ACP), dynamic cone penetrometer (DCP), and light falling weight deflectometer (LFWD) are adopted and applied at nine points of soft ground in South Korea. The Nvalue from the ACP (NACP), which efficiently assesses the relatively deep subgrade, is correlated with the dynamic cone penetration index (DCPI) and dynamic deflection modulus (Evd). Test results show that the DCPI and Evd can be estimated in terms of NACP. In particular, the relationship between Evd and NACP is improved when the strain influence factor of the target ground is considered. For the assessment of strength and stiffness parameters, the California bearing ratio (CBR), relative density (Dr), internal friction angle (φ), and elastic moduli determined by the plate loading test (PLT), soil stiffness gauge (SSG), falling weight deflectometer (FWD) are estimated using NACP. The ACP test with the relationships between engineering parameters and NACP may be an effectively method to assess the overall characteristics of the subgrade.
KW - Automated dynamic cone penetrometer (ACP)
KW - Dynamic cone penetrometer (DCP)
KW - Engineering parameter;light falling weight deflectometer (LFWD)
KW - Subgrade
UR - http://www.scopus.com/inward/record.url?scp=85107484389&partnerID=8YFLogxK
U2 - 10.12989/sss.2021.27.5.861
DO - 10.12989/sss.2021.27.5.861
M3 - Article
AN - SCOPUS:85107484389
VL - 27
SP - 861
EP - 870
JO - Smart Structures and Systems
JF - Smart Structures and Systems
SN - 1738-1584
IS - 5
ER -