WARDANA, NOVANDRI KUSUMA and SAPTONO, Singgih Analysis Of The Stability And Adequacy Level Temporary Support Using Natm Methods On The Excavation Of Railway Tunnel. -. ISSN -
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S Saptono_Analysis Of The stability and adequacy level temporary support using natm methods on the excavation of railway tunnel.pdf Download (2MB) | Preview |
Abstract
NATM (New Austrian Tunneling Method) tunnel construction is able to proceed under instable states of working face, so the stability working face has been regardes as a key scientific issue. This paper based on finite element methods analysis theory established a model for the tunnel face stability. Furthermore, based on the model the influence of rock mass parameter with Generalized Hoek-Brown (2006) criteria and GSI for rock mass quality. NATM tunnel excavation has began top heading first excavate and then bench for fullface excavation. Excavation area are in breccia, sandstone, and claystone with rock mass strength classification is weak rock to intermediate rocks.In this research area, therefore before used for analyzing the opening stability obtained the monitoring data will be used for determining the stress condition of surrounding the openings by trial and error back analysis method. The results of the analysis at monitoring points, the cumulative displacement is average 200mm (<75mm), and displacement rate is average 24mm/days (>1mm/days), therefore it can be classified as unstable condition according to the Cording criteria (1974). Eventhough along the monitoring activy, the observed tunnel condition is in stable condition. Its means that the applied rock supporting system is strong enough. Strata control around the tunnels have significant settlement at the ground surface, and then the structure espescially ground settlement. The determining of ground support will be based for structure and the lithology of the tunnels for the evaluating stability of the existing openings.
| Item Type: | Article |
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| Subjects: | T Technology > TN Mining engineering. Metallurgy |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Nurul Alifah Rahmawati |
| Date Deposited: | 10 Nov 2021 05:13 |
| Last Modified: | 10 Nov 2021 05:13 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/27023 |
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