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All Journal BENTANG : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Jurnal Talenta Sipil
Sasangka, Daru Jaka
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Civil Engineering, Building, Construction & Architecture Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Transportation

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Analisis Metode Ekskavasi Terowongan Pengelak Bendungan Bener Berdasarkan Data Geologi Teknik Sasangka, Daru Jaka
BENTANG : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 9 No 1 (2021): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v9i1.2278

Abstract

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.
Nilai Resistivitas dan Durabilitas Batu Lempung dan Batu Pasir pada Proyek Pembangunan Bendungan Jragung Arisanto, Pranu; Sasangka, Daru Jaka; Patiroi, Andi; Riyanto, Didit Puji; Prasetyo, Wahyu; Dinggatanta, Dinggatanta
Jurnal Talenta Sipil Vol 8, No 1 (2025): Februari
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v8i1.839

Abstract

Each type of rock has different resistivity values as well as durability. Continuous geoelectrical data is highly beneficial for estimating the distribution of rocks based on their resistivity values. The purpose of this study is to observe the resistivity patterns of each rock unit, both subsurface and exposed in the field, where each rock unit has specific durability values. The geoelectrical survey was conducted using the Dipole-Dipole and Wenner-Schlumberger methods with the Multichannel Resistivity MAE X 612 EM+ instrument. A case study was carried out at one of the excavation sites at Jragung Dam, with lithology consisting of sandstone and claystone of varying thicknesses. Claystone was identified as a weaker rock with lower durability compared to sandstone. The durability of claystone ranges from 18% to 60%, while the durability of sandstone exceeds 80%. Based on geoelectrical measurements using the Dipole-Dipole and Wenner-Schlumberger methods, as well as data processing with ERT LAB and Res2DINV software, sandstone generally has a resistivity of more than 18 Ohm.m, while claystone has a resistivity of 0–18 Ohm.m. It was observed that the resistivity values of claystone and sandstone are proportional to the durability of the rocks. The better the rock durability, the higher the resistivity value.
Co-Authors arisanto, Pranu Dinggatanta, Dinggatanta Patiroi, Andi Riyanto, Didit Puji Wahyu Prasetyo