Tinjauan Kekuatan Sistem Penyangga Terowongan dengan Menggunakan Metode Elemen Hingga
Abstract: In the developing
countries like Indonesia, especially in the big cities like Jakarta, tunnel
constructions should be considered to solve traffic problems. Besides,
geological and topographical condition in Indonesia that is rich of mine
materials making tunnel construction will be developed in the future. But then,
to the present time, there are too many cases of failure of tunnel construction
in several countries. This failure caused by supporting system of tunnel
doesn’t capable to support the construction. Based on this phenomenon, it was necessary to research
about review of supporting system strength of tunnel construction.
Stability analysis of mine tunnel that belongs to P.T. Aneka Tambang Tbk,
located in Pongkor Mountain, Bogor, West Java, would be done in this research.
This analysis was conducted with numerical method using plaxis 3D tunnel
software. Slice of tunnel along 15 meters of length will be analyzed in this
research. This slice would be divided into three step of excavation. Mohr
Coloumb material model were used in soil material. Whereas linear elastic model
were used in other materials likes shotcrete, rock bolt and steel sets. Three
variation conditions of tunnels would be considered in this research namely
tunnel without supporting system, tunnel with original supporting system (same
as in the research location), and tunnel with Q system supporting system. In
this research, examination would be done for the change of displacement of the
tunnel construction in consequence of the three conditions above.
The results of this research show that the installation of supporting
system reduced displacement of the tunnel significantly. Average decreasing of
displacement value as a result of the original supporting system is 12.5 cm
(46.30 %). Whereas, average decreasing of displacement as a result of the Q
system supporting system is 9.25 cm (34.26%). Although not as strength as
original supporting system, the Q system supporting system deserves to be
considered in supporting system analysis.
Keywords: tunnel, stability
analysis, supporting system, numerical simulation, finite element method,
displacement
Penulis: Arwan Apriyono,
Sumiyanto
Kode Jurnal: jptindustridd100089