Analisis Metode Ekskavasi Terowongan Pengelak Bendungan Bener Berdasarkan Data Geologi Teknik
DOI:
https://doi.org/10.33558/bentang.v9i1.2278Keywords:
Excavation, Rock, Rock Mass QualityAbstract
The Bener Dam Plan, located in Bener District, Purworejo Regency, Indonesia, has a diversion tunnel. Determination of the appropriate excavation method is very important and necessary to maintain effectiveness and efficiency in the process of implementing the circumvention tunnel construction. The determination of the excavation method is also important for the implementation costs calculation. This research aims to support the planning of determining the appropriate excavation method of the Bener Dam Diversion Tunnel as well as what activities are needed to see the geological conditions of rock in the tunnel both above and below the surface for analysis to determine the excavation. The excavation method was determined by empirical method based on the input parameters of rock conditions, i.e. rock quality, density of discontinuity plane in the rock, and rocks compressive strength. The condition of the tunnel alignment is dominated by good quality andesite breccias (good rock). The empirical analysis of the excavation method shows that the Bener Dam Diversion Tunnel mostly requires a very hard type of blasting (blasting). Another type, i.e. the ripping excavation, is also required.
Downloads
References
ASTM. (1985). Standard Test Method for Determination of the Point Load Strength Index of Rock 1. Rock Mechanics, 22(2), 1–9. https://doi.org/10.1520/D5731-08.2
Bieniawski, Z. T. (1989). Engineering Rock Mass Classifications Wiley & Sons, New York, p. 251. http://www.dot.ca.gov/hq/esc/geotech/references/Rockfall_References/05_Bieniawski_Eng_Rx_Mass_Classification.pdf
Gurocak, Z., Alemdag, S., & Zaman, M. M. (2008). Rock slope stability and excavatability assessment of rocks at the Kapikaya dam site, Turkey. Engineering Geology, 96(1–2), 17–27. https://doi.org/10.1016/j.enggeo.2007.08.005
Hoek, E., Carter, T.G., Diederichs, M. S. (2013). Quantification of the Geological Strength Index Chart This paper was prepared for presentation at the 47 th US Rock Mechanics / Quantification of the Geological Strength Index chart. 47th US Rock Mechanics / Geomechanics Symposium Held in San Francisco, CA, USA, 9.
Palmström, A. (2001). Measurement and characterizations of rock mass jointing. In-Situ Characterization of Rocks - Chapter 2, 1–40.
Palmstrøm, A. (1982). New Delhi 1982 the Volumetric Joint Count - a Useful and Simple Measure of the Degree of Rock Mass Jointing Le Compte Volumetrique De Fissures - Simple Mesure Utile Du Degre De La. Iv Congress International Association of Engineering Geology, 2(3), 221–228.
Pettifer, G. S., & Fookes, P. G. (1994). A revision of the graphical method for assessing the excavatability of rock. Quarterly Journal of Engineering Geology, 27(2), 145–164. https://doi.org/10.1144/gsl.qjegh.1994.027.p2.05
Pratama, I. wahyu, Hanif, I. M., Hidayatullah, & Pramumijoyo, S. (2017). Studi Petrogenesa Batuan Beku Di Daerah Semono Dan Sekitarnya, Kecamatan Kaligesing Dan Bagelen, Kabupaten Purworejo, Provinsi Jawa Tengah Dengan Metode Sayatan Tipis. Seminar Nasional Kebumian Ke-10 Peran Penelitian Ilmu Kebumian Dalam Pembangunan Infrastruktur Di Indonesia, September.
Rahardjo, Wartono, Sukandarrumidi, Rosidi, H. M. . (1995). Peta Geologi Lembar Yogyakarta. Pustlitbang Geologi.
Sasangka, D. J., Indrawan, I. G. B., Taufik, R., & Insani, D. (2019). Modelling of Engineering Geology Condition of Bener Dam Diversion Tunnel Based on Surface and Subsurface Data Ministry of Public Works and Housing of the Republic of Indonesia , 2 Gadjah Mada University. JCY, 1–6.
Sivakugan, N. Kumar, S. Das, B. M. (2004). Rock Mechanics. In Encyclopedia of Geology. https://doi.org/10.1016/B0-12-369396-9/00224-0.
