Stability Analysis of Evasion Tunnels Using the Rock Tunneling Quality Index (Q-System) Method On the Construction of the Bagong Dam Trenggalek, East Java

Revi Eka Wardhany, Sapto Heru Yuwanto

Abstract


The Bagong Dam evasion tunnel is part of the dam construction which functions to drain the water flow so that the dam work can be done. In planning the construction of evasive tunnels, it is necessary to study the geological, geotechnical and structural conditions of the tunnel. This study is intended to provide an overview of the subsurface and engineering geological conditions of the research area, so as to determine the stability of the evasion tunnel and then provide recommendations for the support to be used. The method used is the Rock Tunneling Quality Index (Q-System) method to determine the buffer to be used in the construction process. Based on the analysis of the subsurface geological conditions of the study area, there are three rock layers, namely: sandstone, breccia and limestone. In the Q-System analysis, the rock mass class value ranges from 0.451 to 0.651 with Very Poor quality and the rock mass class value is 1.162 with Poor quality. At the four drill points BH-09, BH-03, BH-10 and BH-11, the recommendation for support is obtained with the type of support (B+5) and SRF+B

Keywords


Geotechnical, Evasion Tunnel, Q-System

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References


A. Aprilianda, M. Z. Lubis, A. Permana, S. D. Pamungkas, and M. Adam, “Survei Penentuan dan Pengontrolan Batas Zona Penyusun Main Dam pada Proyek Bendungan Ladongi Provinsi Sulawesi Tenggara,” JGISE J. Geospatial Inf. Sci. Eng., vol. 3, no. 2, p. 95, 2020, doi: 10.22146/jgise.58743.

M. A. Rai, S. Kramadibrata, and R. K. Watimena, “Mekanika Batuan.” pp. 1–515, 2014.

E. H. King and T. R. Kuesel, “An Introduction to Tunnel Engineering BT - Tunnel Engineering Handbook,” J. O. Bickel, T. R. Kuesel, and E. H. King, Eds. Boston, MA: Springer US, 1996, pp. 1–3.

N. Barton, R. Lien, and J. Lunde, “Engineering classification of rock masses for the design of tunnel support,” Rock Mech., vol. 6, no. 4, pp. 189–236, 1974, doi: 10.1007/BF01239496.

A. Susanti and P. Wijaya, “Rancangan Teknis Penyanggaan Berdasarkan Kelas Massa Batuan Dengan Menggunakan Metode RMR dan Q-System di Terowongan Gudang Handak dan Pasir Jawa UBPE Pongkor PT. Aneka Tambang Persero Tbk,” Pros. Semin. Nas. ReTII, vol. 0, no. 0, pp. 165–169, 2017.

Subagio, “Struktur Geologi Bawah Permukaan Pegunungan Selatan Jawa Barat Ditafsir dari Anomali Bouguer,” J. Geol. dan Sumberd. Miner., vol. 19, no. 4, pp. 187–200, 2018.

T. S. H. Samodra, Suharsono, S. Gafoer, “Peta Geologi Lembar Tulungagung, Jawa.” Pusat Penelitian dan Pengambangan Geologi, 1992.

D. F. Yance, “Analisis Kestabilan Terowongan Menggunakan Metode Rock Tunnelling Quality Index (Q-System) Ditambang Batubara Pt. Allied Indo Coal Jaya Kota Sawahlunto Provinsi Sumatera Barat,” Sekol. Tinggi Teknol. Ind. Padang, pp. 1–6, 2020, [Online]. Available: https://doi.org/10.1016/j.tmaid.2020.101607%0Ahttps://doi.org/10.1016/j.ijsu.2020.02.034%0Ahttps://onlinelibrary.wiley.com/doi/abs/10.1111/cjag.12228%0Ahttps://doi.org/10.1016/j.ssci.2020.104773%0Ahttps://doi.org/10.1016/j.jinf.2020.04.011%0Ahttps://doi.o.

Zakky, M. N. (2016). GEOLOGI DAN VULKANOSTRATIGRAFI DAERAH KARANGREJO DAN SEKITARNYA, KECAMATAN KAMPAK, KABUPATEN TRENGGALEK, PROVINSI JAWA TIMUR (Doctoral dissertation, UPN" Veteran" Yogyakarta).

Negara, A. (2020). Pemetaan Geologi dan Analisis Kinematika Longsoran Daerah Bendungan, Kabupaten Trenggalek, Jawa Timur (Doctoral dissertation).

CRUZ, M. A. B. L. D. (2017). Geologi Dan Analisis Ancaman Bencana Longsor, Daerah Ngerdani Dan Sekitarnya, Kecamatan Dongko, Kabupaten Trenggalek Provinsi Jawa Timur (Doctoral dissertation, UPN" Veteran" Yogyakarta).

Bayuningrum, N. Dampak Ekonomis Dam Bagong dalam Pertanian Padi Masyarakat Ngantru, Trenggalek 2006-2016 (Bachelor's thesis, Fakultas Adab dan Humaniora UIN Syarif Hidayatullah Jakarta).

Purba, T. M. K., Poerwanto, J. A., & Sasongko, R. (2021). PERENCANAAN ULANG GEOMETRIK DAN PERKERASAN LENTUR JALUR LINTAS SELATAN LOT 6 STA. 1+ 400–STA. 6+ 400. Jurnal Online Skripsi Manajemen Rekayasa Konstruksi (JOS-MRK), 2(4), 45-50.

Ni'am, M. A. (2022). Studi Alternatif Analisa Sedimentasi Terhadap Umur Bendungan Bagong Kabupaten Trenggalek Berbasis Arc Gis. Jurnal Rekayasa Sipil, 12(2), 90-98.

CARY, E. (2020). Karakteristik Geologi Teknik Rencana Konstruksi Bendungan Bagong, Kabupaten Trenggalek, Provinsi Jawa Timur (Doctoral dissertation, Universitas Gadjah Mada).

Zakarya, W. A., Novianto, D., & Rochman, T. (2022). ANALISIS ULANG STABILITAS KONSTRUKSI BANGUNAN PELIMPAH BENDUNGAN BAGONG TRENGGALEK. Jurnal Online Skripsi Manajemen Rekayasa Konstruksi (JOS-MRK), 3(1), 254-261.




DOI: https://doi.org/10.31284/j.jemt.2022.v3i1.3380

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