Application of automated cone penetrometer for railway investigation using correlations with DCPI and Deflection Modulus

Yeob Kim Sang; Won Taek Hong; Jong Sub Lee

doi:10.1016/j.rcar.2022.09.006

Application of automated cone penetrometer for railway investigation using correlations with DCPI and Deflection Modulus

Yeob Kim Sang, Won Taek Hong, Jong Sub Lee

School of Civil, Environmental and Architectural Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Portable in-situ devices have been used for characterizing low accessible field, such as the railway subgrade. In this study, the automated cone penetrometer (ACP) was designed for the application on the railway subgrade. ACP is composed of the cone tip, driving rod, and hydraulic hammer system. The hydraulic motor lifts and drops the 294.3 N hammer from a height of 200 mm such that the potential energy of 58.9 N?m impacts the driving rod. The N-value (N_ACP) from the ACP test was compared with the dynamic cone penetration index (DCPI) from the dynamic cone penetrometer (DCP) test. The test results show that the N_ACP and DCPI profiles show opposite trend owing to the inverse concept of the unit. From the correlation of DCPI and N_ACP, the limitation of DCPI reveals owing the minimum manually measured value of 1 mm/blow. Additionally, the evaluation of the deflection modulus (E_FWD) using N_ACP is more efficient than that using DCPI. Based on the result of this study, we suggest that ACP can be used for strength and stiffness evaluation of railway subgrade rapidly and reliably.

Original language	English
Pages (from-to)	282-286
Number of pages	5
Journal	Sciences in Cold and Arid Regions
Volume	14
Issue number	4
DOIs	https://doi.org/10.1016/j.rcar.2022.09.006
Publication status	Published - 2022 Aug

Keywords

Automated cone penetrometer
DCPI
E
N
Railway subgrade

ASJC Scopus subject areas

Environmental Engineering
Environmental Science (miscellaneous)
Geotechnical Engineering and Engineering Geology
Earth-Surface Processes

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10.1016/j.rcar.2022.09.006

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title = "Application of automated cone penetrometer for railway investigation using correlations with DCPI and Deflection Modulus",

abstract = "Portable in-situ devices have been used for characterizing low accessible field, such as the railway subgrade. In this study, the automated cone penetrometer (ACP) was designed for the application on the railway subgrade. ACP is composed of the cone tip, driving rod, and hydraulic hammer system. The hydraulic motor lifts and drops the 294.3 N hammer from a height of 200 mm such that the potential energy of 58.9 N?m impacts the driving rod. The N-value (NACP) from the ACP test was compared with the dynamic cone penetration index (DCPI) from the dynamic cone penetrometer (DCP) test. The test results show that the NACP and DCPI profiles show opposite trend owing to the inverse concept of the unit. From the correlation of DCPI and NACP, the limitation of DCPI reveals owing the minimum manually measured value of 1 mm/blow. Additionally, the evaluation of the deflection modulus (EFWD) using NACP is more efficient than that using DCPI. Based on the result of this study, we suggest that ACP can be used for strength and stiffness evaluation of railway subgrade rapidly and reliably.",

keywords = "Automated cone penetrometer, DCPI, E, N, Railway subgrade",

author = "Sang, {Yeob Kim} and Hong, {Won Taek} and Lee, {Jong Sub}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. NRF-2021R1A5A1032433; NRF-2020R1A2B5B03001470). Funding Information: ThisworkwassupportedbytheNationalResearch Foundation of Korea (NRF) grant funded by the Ko‐ rea government (MSIT) (No. NRF-2021R1A5A10324 Publisher Copyright: {\textcopyright} 2022, Science Press. All right reserved.",

year = "2022",

month = aug,

doi = "10.1016/j.rcar.2022.09.006",

language = "English",

volume = "14",

pages = "282--286",

journal = "Sciences in Cold and Arid Regions",

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AU - Sang, Yeob Kim

AU - Hong, Won Taek

AU - Lee, Jong Sub

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. NRF-2021R1A5A1032433; NRF-2020R1A2B5B03001470). Funding Information: ThisworkwassupportedbytheNationalResearch Foundation of Korea (NRF) grant funded by the Ko‐ rea government (MSIT) (No. NRF-2021R1A5A10324 Publisher Copyright: © 2022, Science Press. All right reserved.

PY - 2022/8

Y1 - 2022/8

N2 - Portable in-situ devices have been used for characterizing low accessible field, such as the railway subgrade. In this study, the automated cone penetrometer (ACP) was designed for the application on the railway subgrade. ACP is composed of the cone tip, driving rod, and hydraulic hammer system. The hydraulic motor lifts and drops the 294.3 N hammer from a height of 200 mm such that the potential energy of 58.9 N?m impacts the driving rod. The N-value (NACP) from the ACP test was compared with the dynamic cone penetration index (DCPI) from the dynamic cone penetrometer (DCP) test. The test results show that the NACP and DCPI profiles show opposite trend owing to the inverse concept of the unit. From the correlation of DCPI and NACP, the limitation of DCPI reveals owing the minimum manually measured value of 1 mm/blow. Additionally, the evaluation of the deflection modulus (EFWD) using NACP is more efficient than that using DCPI. Based on the result of this study, we suggest that ACP can be used for strength and stiffness evaluation of railway subgrade rapidly and reliably.

AB - Portable in-situ devices have been used for characterizing low accessible field, such as the railway subgrade. In this study, the automated cone penetrometer (ACP) was designed for the application on the railway subgrade. ACP is composed of the cone tip, driving rod, and hydraulic hammer system. The hydraulic motor lifts and drops the 294.3 N hammer from a height of 200 mm such that the potential energy of 58.9 N?m impacts the driving rod. The N-value (NACP) from the ACP test was compared with the dynamic cone penetration index (DCPI) from the dynamic cone penetrometer (DCP) test. The test results show that the NACP and DCPI profiles show opposite trend owing to the inverse concept of the unit. From the correlation of DCPI and NACP, the limitation of DCPI reveals owing the minimum manually measured value of 1 mm/blow. Additionally, the evaluation of the deflection modulus (EFWD) using NACP is more efficient than that using DCPI. Based on the result of this study, we suggest that ACP can be used for strength and stiffness evaluation of railway subgrade rapidly and reliably.

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Application of automated cone penetrometer for railway investigation using correlations with DCPI and Deflection Modulus

Abstract

Keywords

ASJC Scopus subject areas

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