WARDANA, NOVANDRI KUSUMA and SAPTONO, Singgih (2018) Analysis Of The Stability And Adequacy Level Temporary Support Using Natm Methods On The Excavation Of Railway Tunnel. -. ISSN -
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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 |
|---|---|
| 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: | 27 May 2024 03:25 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/27023 |
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