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Geological assessment for tunnel excavation under river with shallow overburden using surface site investigation data and electrical resistivity tomography

Tunnelling is a challenging task as many geotechnical uncertainties involved during construction, especially under a river crossing with shallow overburden. This study focussed on geological assessment for the New Austrian Tunneling Method excavation that crosses under Kerau River with shallow overb...

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Main Authors:	Ismail, Mohd Ashraf Mohamad, Majid, Taksiah A., Goh, Chin Ong, Lim, Siao Phin, Tan, Chee Ghuan
Format:	Article
Published:	Elsevier 2019
Subjects:	TA Engineering (General). Civil engineering (General)
Online Access:	http://eprints.um.edu.my/24080/ https://doi.org/10.1016/j.measurement.2019.05.025
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id	my.um.eprints.24080
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spelling	my.um.eprints.240802020-03-22T09:39:59Z http://eprints.um.edu.my/24080/ Geological assessment for tunnel excavation under river with shallow overburden using surface site investigation data and electrical resistivity tomography Ismail, Mohd Ashraf Mohamad Majid, Taksiah A. Goh, Chin Ong Lim, Siao Phin Tan, Chee Ghuan TA Engineering (General). Civil engineering (General) Tunnelling is a challenging task as many geotechnical uncertainties involved during construction, especially under a river crossing with shallow overburden. This study focussed on geological assessment for the New Austrian Tunneling Method excavation that crosses under Kerau River with shallow overburden. 3D filtered tunnel models using Boolean filter for rock mass weathering grade, rock quality designation, and Lugeon value are developed. Results predict that 53.3% of the tunnel excavation under the Kerau River crossing are highly weathered rocks (Grades III and IV), and 64.51% are in the moderately to highly fractured zone (0%–75% RQD) along the roof of the tunnel granitic bedrock. The Lugeon value models show that 71.64% of the excavating rocks possess a Lugeon value of 5–50 (6–60 × 10−5 cm/s), which denotes considerably high permeability. 2D electrical resistivity tomography is used to verify the permeability results from the Lugeon test. © 2019 Elsevier Ltd Elsevier 2019 Article PeerReviewed Ismail, Mohd Ashraf Mohamad and Majid, Taksiah A. and Goh, Chin Ong and Lim, Siao Phin and Tan, Chee Ghuan (2019) Geological assessment for tunnel excavation under river with shallow overburden using surface site investigation data and electrical resistivity tomography. Measurement, 144. pp. 260-274. ISSN 0263-2241 https://doi.org/10.1016/j.measurement.2019.05.025 doi:10.1016/j.measurement.2019.05.025
institution	Universiti Malaya
building	UM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaya
content_source	UM Research Repository
url_provider	http://eprints.um.edu.my/
topic	TA Engineering (General). Civil engineering (General)
spellingShingle	TA Engineering (General). Civil engineering (General) Ismail, Mohd Ashraf Mohamad Majid, Taksiah A. Goh, Chin Ong Lim, Siao Phin Tan, Chee Ghuan Geological assessment for tunnel excavation under river with shallow overburden using surface site investigation data and electrical resistivity tomography
description	Tunnelling is a challenging task as many geotechnical uncertainties involved during construction, especially under a river crossing with shallow overburden. This study focussed on geological assessment for the New Austrian Tunneling Method excavation that crosses under Kerau River with shallow overburden. 3D filtered tunnel models using Boolean filter for rock mass weathering grade, rock quality designation, and Lugeon value are developed. Results predict that 53.3% of the tunnel excavation under the Kerau River crossing are highly weathered rocks (Grades III and IV), and 64.51% are in the moderately to highly fractured zone (0%–75% RQD) along the roof of the tunnel granitic bedrock. The Lugeon value models show that 71.64% of the excavating rocks possess a Lugeon value of 5–50 (6–60 × 10−5 cm/s), which denotes considerably high permeability. 2D electrical resistivity tomography is used to verify the permeability results from the Lugeon test. © 2019 Elsevier Ltd
format	Article
author	Ismail, Mohd Ashraf Mohamad Majid, Taksiah A. Goh, Chin Ong Lim, Siao Phin Tan, Chee Ghuan
author_facet	Ismail, Mohd Ashraf Mohamad Majid, Taksiah A. Goh, Chin Ong Lim, Siao Phin Tan, Chee Ghuan
author_sort	Ismail, Mohd Ashraf Mohamad
title	Geological assessment for tunnel excavation under river with shallow overburden using surface site investigation data and electrical resistivity tomography
title_short	Geological assessment for tunnel excavation under river with shallow overburden using surface site investigation data and electrical resistivity tomography
title_full	Geological assessment for tunnel excavation under river with shallow overburden using surface site investigation data and electrical resistivity tomography
title_fullStr	Geological assessment for tunnel excavation under river with shallow overburden using surface site investigation data and electrical resistivity tomography
title_full_unstemmed	Geological assessment for tunnel excavation under river with shallow overburden using surface site investigation data and electrical resistivity tomography
title_sort	geological assessment for tunnel excavation under river with shallow overburden using surface site investigation data and electrical resistivity tomography
publisher	Elsevier
publishDate	2019
url	http://eprints.um.edu.my/24080/ https://doi.org/10.1016/j.measurement.2019.05.025
_version_	1662755220175716352
score	13.211869

Geological assessment for tunnel excavation under river with shallow overburden using surface site investigation data and electrical resistivity tomography

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