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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.
Resistivity Model of Clayshale Layers in Dry Season and Early Rainy Season Conditions Case Study of the Jragung Dam Project Sasangka, Daru Jaka; Arisanto, Pranu; Dhanardono, Bhima; Riyanto, Didit Puji; Apriyoga, Wahyu
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 12 No 2 (2024): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil (July 2024)
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v12i2.9576

Abstract

The use of geoelectricity as subsurface data acquisition will be very helpful if used to perform correlations on rock formations. The aim of this research is to look at the pattern of subsurface resistivity values ​​compared to the condition of rock layers or outcrops in the field. The geoelectric survey used the dipole dipole method with the Multichannel Resistivity MAE X 612 EM+ instrument. The case study was carried out at one of the excavation locations at Jragung Dam with sandstone and clay stone lithology with varying thicknesses. Conditions in the field are that the clay stone layer is starting to experience greater deformation compared to the sandstone layer. Worse deformation in claystone in the field is caused by durability values ​​which are generally worse than sandstone and the greater water content in claystone even though its compressive strength is relatively greater. In the dry season, sandstone (Reference point 1) at a depth of 5m has a resistivity of >86 ohm.m, while claystone has 12 - 15 ohm.m. At the beginning of the rainy season sandstone 37 – 50 ohm.m, clay stone (reference point 1) resistivity 8-11 ohm.m. The resistivity of claystone does not change significantly with changes in conditions. Because the porosity and permeability of sandstone can change significantly under changing
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 Apriyoga, Wahyu arisanto, Pranu Dhanardono, Bhima Dinggatanta, Dinggatanta Patiroi, Andi Riyanto, Didit Puji Wahyu Prasetyo