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PENERAPAN METODE Q-SLOPE DALAM PENILAIAN STABILITAS LERENG ALAMI Andesta Granitio Irwan; Danu Mirza Reky; Singgih Saptono
Prosiding Temu Profesi Tahunan PERHAPI 2020: PROSIDING TEMU PROFESI TAHUNAN PERHAPI
Publisher : PERHAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36986/ptptp.v0i0.138

Metode analisis lereng menggunakan Q-slope dalam penilaian stabilitas suatu lereng sudah digunakan dalam lima tahun terakhir untuk memberikan rekomendasi sudut aman penggalian suatu lereng secara cepat dan efisien dengan menggunakan persamaan empirik. Penerapan metode ini dilakukan pada dua lokasi lereng breksi andesit alami dengan kondisi batuan lereng 1 fresh tanpa adanya longsoran dan kondisi lereng 2 sudah mengalami pelapukan serta adanya kenampakan longsoran blok baji. Metode pengambilan data dilakukan pemetaan diskontinuitas pada lereng menggunakan garis bentangan dan pengambilan sampel batuan untuk pengujian sifat fisik dan mekanik batuan serta penilaian secara deskriptif untuk mendapatkan parameter input persamaan empirik Q-slope dengan validasi nilai faktor keamanan metode elemen hingga. Hasil plotting data pada grafik Q-slope menunjukkan rekomendasi sudut lereng Q-slope pada lokasi 1 lebih curam (85o) dibandingkan lereng aktual (30o) dengan kondisi lereng stabil, sedangkan sudut lereng rekomendasi Q-slope lokasi 2 lebih landai (68o) dibandingkan sudut lereng aktual di lapangan (79o) dengan kondisi lereng semi-stabil dan tidak stabil. Metode kesetimbangan batas dengan simulasi sudut lereng Q-slope dan sudut lereng aktual menunjukkan nilai faktor keamanan (SRF) lereng kedua lokasi penelitian yaitu lokasi 1 dengan sudut lereng aktual yaitu 3,3 dan Q-slope yaitu 2,11, sedangkan faktor keamanan (SRF) lokasi 2 yaitu 1 untuk sudut lereng aktual dan 1,17 untuk Q-slope. Hasil analisis metode Q-slope memberikan hasil yang relatif cepat dalam analisis lereng dengan metode numerik sebagai validasi menunjukkan keselarasan yang lebih kuantitatif dalam analisis faktor keamanan stabilitas suatu lereng.

Effect of Porosity on Uniaxial Compressive Strength in Sedimentary Rocks Andesta Granitio Irwan
PROMINE Vol 8 No 2 (2020): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/promine.v8i2.2057

The rock strength parameter is an important factor used in determining the geotechnical design in determining the stability of the underground slope or mine. One of the rock strength tests in the laboratory (intact rock) is the uniaxial compressive strength test. One of the factors that influence rock strength is the porosity of the rock itself, especially in sedimentary rocks. The rock porosity test is carried out by testing the physical properties of the rock, then a regression analysis is carried out to obtain the correlation of the effect of porosity on rock strength and the correlation between porosity and absorption considered in the analysis. The linear regression results obtained between porosity and saturated water content of rocks showed a positive correlation where the increase in porosity, the saturated water content also increased. The correlation between porosity and uniaxial compressive strength obtained a strong correlation with the power regression model as the best model compared to other regression models because it has the lowest error based on the Root Mean Square Error (RMSE). The final result is obtained by comparing the effect of porosity on rock strength, that is the higher the porosity value have the smaller porosity, so that an increase in rock porosity will reduce the strength of the rock.

Perbandingan Perhitungan Sisa Cadangan Batu Granit Menggunakan Metode Cross Section Terhadap Metode Contour Pada PT Aditya Buana Inter Di Kabupaten Bangka Andesta Granitio Irwan; Irvani Irvani; Guskarnali Guskarnali
MINERAL Vol 3 No 1 (2018): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

The calculation of the remaining reserves is one of the important things in the world of mining, especially in the mining business of granite. The importance of the calculation of reserves is used to determine the potential of granite stone resources in determining the amount of production of the company and the age of the company. For that many methods of calculating the reserves that can be used according to the type of minerals to be calculated the remaining reserves one of them using Cross Section Method and Contour Method. Field measurement used theodolith which further processing done by making contour map using Software Surpac 6.6.2. Processing using Minescape 4.119 Software for Cross Section Method with contour map iterval 1, 5, and 10 m and in division section with interval section 10, 15, and 20 m so as to obtain the width of field section, while Contour Method used contour elevation map that is 1, 5, and 10 m so as to obtain the area of the field between the same elevation. After obtaining the area of each method, use the frustum equation and mean area to determine the volume of surface reserves and from the volume results can be known the length of the mine life. The results obtained from the processing is the method of Cross Section largest reserve calculation value is at contour 1 m with the interval section 10 m that is equal to 5.662.168,28 m3 or 14.721.637,53 tons, while the Contour Method of the largest reserve value is at a contour interval of 1 m ie 4,871,332,59 m3 or 12,665,464,73 tons and for the age of the mine obtained using the highest reserve value in the Cross Section Method has a longer mine life of 42 years, while in Contour Method is 41 years.

Pengaruh Diskontinuitas Terhadap Kestabilan Lereng Batuan Terkekarkan Studi Kasus Kuari Andesit PT Lola Laut Timur Kabupaten Bogor Andesta Granitio Irwan; S. Koesnaryo; Barlian Dwinagara; Singgih Saptono
PROMINE Vol 9 No 2 (2021): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Sains dan Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/promine.v9i2.2433

Diskontinuitas pada suatu massa batuan memberikan pengaruh pada kestabilan suatu lereng batuan karena merupakan salah satu faktor pengendali dari keruntuhan lereng. Dalam penelitian ini dilakukan analisis terhadap peran diskontinuitas yaitu kekar dan intrusi terhadap kestabilan lereng serta pengaruh parameter persisten dan kekasaran kekar terhadap nilai faktor keamanan lereng serta kekuatan massa batuan. Analisis yang digunakan yaitu pengaruh intrusi, persisten serta nilai kekasaran kekar terhadap nilai faktor keamanan lereng. Pengolahan data kestabilan lereng menggunakan Software Rocscience RS2 dengan pemodelan Metode Elemen Hingga dengan pemodelan massa batuan yang digunakan dalam analisis yaitu Model Paralel Deterministik dan Model Veneziano.Hasil penelitian menunjukkan bahwa keberadaan intrusi pada lereng memberikan penurunan nilai faktor keamanan lereng hingga 0,95%. Pengaruh parameter persistensi terhadap faktor keamanan lereng diperoleh bahwa semakin meningkat nilai persistensi maka akan menurunkan nilai faktor keamanan lereng hingga 5,3 – 5,8% dan perubahan nilai JRC menurunkan nilai faktor keamanan hingga 3,2%. Pengaruh persistensi dan kekasaran kekar (JRC) terhadap kekuatan massa batuan diperoleh bahwa adanya peningkatan nilai persistensi akan menurunkan kekuatan massa batuan hingga 1,94% dan penurunan nilai kekasaran kekar akan menurunkan kekuatan massa batuan hingga 1,63%.

Reconstruction of Natural Slope Stability by Limit Equilibrium Methods and Finite Element Methods Irwan, Andesta Granitio; Wiati, Irene Tresna
Dinamika Teknik Sipil: Majalah Ilmiah Teknik Sipil Vol. 16/No.2/Desember 2023
Publisher : Departement of Civil Engineering, Faculty of Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/dts.v16i2.23276

Slope stability analysis is particularly important for natural slopes that are relatively undesigned to be technically safe. Natural slopes are prone to collapse depending on the condition of the slope material and rainfall. A comprehensive stability analysis using numerical methods to calculate the factor of safety and probability of collapse can be used as a reference to assess the safety of a slope. This study discusses boundary equilibrium and finite element in the analysis of slope safety factor and landslide probability by reconstructing the slope with landslide history. The reconstruction of the slope is based on the actual slope condition with saturated material due to rain that has a safety factor of 0.5 using mathematical methods which are then analyzed numerically in this study. The results of the factor of safety on the saturated condition slope have a value that is not much different from the actual condition with a 100% probability of landslide. The results of low shear strength values in each slice of the limit equilibrium analysis for saturated conditions also indicate that the slope is in an unsafe condition which is supported by the development of shear and tensile strains in the finite element method analysis in the slope slide plane area which causes the stress distribution in the actual landslide area to be unstable.

Studi Pemanfaatan Limbah Penambangan Granit pada Karakteristik Kekuatan Tanah Laterit untuk Konstruksi Timbunan Jalan Irwan, Andesta Granitio; Arif, Maulana; Bayu, Hendi Hendra; Aditiawan, Riski; Panita, Shakila
Jurnal Rekayasa Sipil Vol 20, No 3 (2024)
Publisher : Civil Engineering Departement, Andalas University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrs.20.3.136-148.2024

Tanah laterit lokal di Kepulauan Bangka Belitung menjadi salah satu material utama dalam konstruksi teknik sipil khususnya timbunan. Beberapa penelitian terkait tanah laterit memberikan anggapan bahwa seringkali tanah laterit mengalami kerusakan karena adanya air dan juga menyebabkan pemadatan menjadi berkurang. Penelitian ini bertujuan untuk mengidentifikasi spesifikasi dan karakteristik tanah laterit sebagai konstruksi timbunan dengan penambahan limbah debu granit sebagai bahan campuran untuk menstabilkan tanah sebagai timbunan. Penelitian dilakukan dengan skala laboratorium dengan pengujian sifat fisik dan mekanik pada tanah asli serta campuran debu granit sesuai skema campuran 0%, 5%, 10%, 15%, 25% dan 30%. Hasil menunjukkan bahwa tanah laterit lokal masuk dalam golongan Silty Clay berplastisitas sedang-rendah, penambahan debu granit memberikan perubahan pada karakteristik tanah sehingga terjadinya penurunan nilai plastisitas yang secara spesifikasi sesuai untuk timbunan. Penambahan debu granit menyebabkan pemadatan tanah menjadi lebih mudah dengan densitas yang meningkat dan kadar air yang menurun, pemadatan optimal terjadi pada campuran debu granit 30%. Penambahan debu granit meningkatkan nilai CBR pada tanah sehingga masuk ke dalam syarat spesifikasi timbunan jalan yaitu >6% untuk campuran 5-15% dan optimal pada 10%. Pengujian kuat tekan memperlihatkan bahwa peningkatan nilai kuat tekan setelah ditambahkan campuran debu granit dimana pada campuran 10% merupakan kondisi tanah memiliki kekuatan optimal pada beban aksial

ANALISIS KUALITAS AIR LIMBAH WUDHU DALAM SISTEM DAUR ULANG BERKELANJUTAN Irwan, Andesta Granitio; Pratama, Yudistira Bagus; Okta, Evan Dwi
Jurnal Teknik Sipil Vol. 17 No. 4 (2024)
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/jts.v17i4.9671

Water is one of the important elements in supporting human life so that optimal use of water can have a big impact on life. Water-saving practices, especially during ablution, are often uncontrollable, resulting in water-wasting behavior. In addition, the acidic pH conditions in some of the water samples used are feared to have a long-term adverse impact on individual users. This research provides a solution in saving water with an ablution wastewater recycling system for reuse by utilizing Internet of Things (IoT)-based monitoring that can record water usage discharge using a flowmeter while connected to a smartphone. In the simulation, a prototype is used which is designed as a water recycling system that can be monitored with the addition of a filtration system to filter waste and improve water quality, namely Total Dissolved Solids (TDS), Dissolved Oxygen (DO), and pH. The results showed that in total 52 samples, the average water usage was 2.45 liters / person and 42.31% were in the wasteful category. Comparison of water quality before and after filtering has a significant increase with TDS values reaching 118%, DO 41% and pH 42.31%. This increase shows better water quality after filtering so that it can be reused and the recycling results in the system used have an efficiency of 44% based on the comparison of monitoring volume and actual volume of water.

Studi Pemanfaatan Limbah Penambangan Granit pada Karakteristik Kekuatan Tanah Laterit untuk Konstruksi Timbunan Jalan Irwan, Andesta Granitio; Arif, Maulana; Bayu, Hendi Hendra; Aditiawan, Riski; Panita, Shakila
Jurnal Rekayasa Sipil (JRS-Unand) Vol. 20 No. 3 (2024)
Publisher : Civil Engineering Departement, Andalas University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrs.20.3.136-148.2024

Local laterite soil in the Bangka Belitung Islands is one of the main materials in civil engineering construction, especially embankments. Several studies related to laterite soil suggest that laterite soil is often damaged by water and also causes reduced compaction. This study aims to identify the specifications and characteristics of laterite soil as embankment construction with the addition of granite dust waste as a mixture to stabilize the soil as an embankment. The study was conducted on a laboratory scale by testing the physical and mechanical properties of the original soil and granite dust mixture according to the mixture scheme of 0%, 5%, 10%, 15%, 25% and 30%. The results show that local laterite soil is included in the Silty Clay group with medium-low plasticity, the addition of granite dust changes the characteristics of the soil so that there is a decrease in the plasticity value which is specifically suitable for embankments. The addition of granite dust makes soil compaction easier with increased density and decreased water content, optimal compaction occurs in a mixture of 30% granite dust. The addition of granite dust increases the CBR value of the soil so that it enters the road embankment specification requirements, namely >6% for a mixture of 5-15% and optimally at 10%. Compressive strength testing shows that the increase in compressive strength after the addition of granite dust mixture where the 10% mixture is the condition of the soil having optimal strength under axial load.

Perbandingan Perhitungan Sisa Cadangan Batu Granit Menggunakan Metode Cross Section Terhadap Metode Contour Pada PT Aditya Buana Inter Di Kabupaten Bangka: Comparison Of Calculation The Rest Reserve Of Granite Using Cross Section Method On Contour Method At PT Aditya Buana Inter In Bangka Regency Irwan, Andesta Granitio; Irvani, Irvani; Guskarnali, Guskarnali
MINERAL Vol 3 No 1 (2018): MINERAL
Publisher : Program Studi Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v3i1.1573

The calculation of the remaining reserves is one of the important things in the world of mining, especially in the mining business of granite. The importance of the calculation of reserves is used to determine the potential of granite stone resources in determining the amount of production of the company and the age of the company. For that many methods of calculating the reserves that can be used according to the type of minerals to be calculated the remaining reserves one of them using Cross Section Method and Contour Method. Field measurement used theodolith which further processing done by making contour map using Software Surpac 6.6.2. Processing using Minescape 4.119 Software for Cross Section Method with contour map iterval 1, 5, and 10 m and in division section with interval section 10, 15, and 20 m so as to obtain the width of field section, while Contour Method used contour elevation map that is 1, 5, and 10 m so as to obtain the area of the field between the same elevation. After obtaining the area of each method, use the frustum equation and mean area to determine the volume of surface reserves and from the volume results can be known the length of the mine life. The results obtained from the processing is the method of Cross Section largest reserve calculation value is at contour 1 m with the interval section 10 m that is equal to 5.662.168,28 m3 or 14.721.637,53 tons, while the Contour Method of the largest reserve value is at a contour interval of 1 m ie 4,871,332,59 m3 or 12,665,464,73 tons and for the age of the mine obtained using the highest reserve value in the Cross Section Method has a longer mine life of 42 years, while in Contour Method is 41 years.

Strategi Pengembangan Pulau Kelapan Desa Kumbung sebagai Destinasi Pariwisata Berkelanjutan Ikhlas Makruf; Warisa Warisa; Intan Kurnia; Verbi Haryanto; Winarsih Winarsih; Depita Kirana; Ines Pratiwi; Zainul Arif Rosyadi; Muhammad Ali Bangsawan; Dewi Astri; Andesta Granitio Irwan
Jurnal Pengabdian Masyarakat Waradin Vol. 5 No. 2 (2025): Jurnal Pengabdian Masyarakat Waradin
Publisher : Sekolah Tinggi Ilmu Ekonomi Pariwisata Indonesia Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56910/wrd.v5i2.644

Kelapan Island, located in Kumbung Village, has great potential as a sustainable tourism destination. Natural beauty, biodiversity, and unique local culture are the main attractions. This study aims to analyze the potential and development strategies of Kelapan Island as a sustainable tourism destination. The method used is a qualitative descriptive method including field observation, interviews with local people, and literature analysis. The results of the study indicate that community-based management, environmental conservation, and effective promotion can increase tourist attractions without damaging the ecosystem. In conclusion, Kelapan Island has great potential to develop as an economically profitable and sustainable ecotourism destination.

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