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, DOI https://doi.org/10.1016/j.measurement.2019.05.025.
Full text not available from this repository.Abstract
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
| Item Type: | Article |
|---|---|
| Funders: | Fundamental Research Grant Scheme of the Ministry of Education Malaysia : Analysis of Rock Burst Behaviour under Overstressed Rock in Deep Tunnel Excavation across the Titiwangsa Range, Malaysia (Grant No. 203/PAWAM/6071259), RU Grant of University of Malaya (Grant No. GPF026A-2018) |
| Uncontrolled Keywords: | Geological assessment; NATM tunnel; Filtered tunnel model; Lugeon value; Rock mass weathering grade; Rock quality designation |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Faculty of Engineering |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 22 Mar 2020 09:39 |
| Last Modified: | 22 Mar 2020 09:39 |
| URI: | http://eprints.um.edu.my/id/eprint/24080 |
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