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All Journal INJURITY: Journal of Interdisciplinary Studies Jurnal Ekonomi, Teknologi dan Bisnis Equivalent: Jurnal Ilmiah Sosial Teknik El-Mujtama: Jurnal Pengabdian Masyarakat Journal of Green Science and Technology
Rezeki, Ingrid Multi
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Analysis Of Soil Resistance To Liquefaction With Standard Penetration Test Hidayat, Rifky Arif Aziz; Irfan, Mochammad; Tejo, Abdurrachman Aryo; Rezeki, Ingrid Multi
Equivalent: Jurnal Ilmiah Sosial Teknik Vol. 7 No. 1 (2025): Equivalent: Jurnal Ilmiah Sosial Teknik
Publisher : Politeknik Siber Cerdika Internasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59261/jequi.v7i1.222

Abstract

A phenomenon known as liquefaction occurs when soil loses strength and turns to mud due to earthquake shaking, which can cause damage to infrastructure such as underpass boxes. Based on data from the National Center for Earthquake Studies, Semarang City has a history of earthquakes dating back to 1856 with varying degrees of infrastructure damage. Currently, the phenomenon poses a threat to the people of Semarang City caused by an active fault that runs along the north coast of Central Java. So, this research aims to analyze the soil resistance to liquefaction in the Preliminary Project of Capacity Improvement of Pedestrian Box Underpass Karangingas II Semarang using the Standard Penetration Test (SPT). The data obtained were analyzed using the simplified method proposed by Seed & Idriss (1971). The results show that the soil resistance to liquefaction at a depth of 0 - 4 meters at point BH-02 is quite high, with a safety factor (SF) value greater than 1, so no liquefaction occurs. However, at a depth of 4 - 8 meters, the SF value is less than 1, indicating the liquefaction potential. At points BH-01 and BH-03, the analysis shows the potential for liquefaction at all depths tested. Based on the analysis results, two of the three locations of the box underpass capacity enhancement project have the potential to experience liquefaction, with point two only experiencing liquefaction at a certain depth. Therefore, liquefaction prevention measures are required in these areas.
Analysis of Borepile Foundation Bearing Capacity in Building Construction Projects with Pile Driving Analyzer Test Prasetyo, Muhammad Hafizh; Hidayat, Fazry; Guntoro, Hardian Tri; Rezeki, Ingrid Multi
Interdiciplinary Journal and Hummanity (INJURITY) Vol. 4 No. 8 (2025): Injuruty: Interdiciplinary Journal and Humanity
Publisher : Pusat Publikasi Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58631/injurity.v4i8.1461

Abstract

In the construction process, a building requires good planning, because structural elements must be able to receive loads in the form of axial directional loads such as gravitational loads as well as lateral directional loads such as wind loads and earthquake loads, all of which will later be passed on to the lower structure, namely the foundation. One of the things that is reviewed from the foundation is the value of the carrying capacity, to find out the value of the carrying capacity of a foundation can be calculated theoretically based on data from soil investigations in the field. Meanwhile, the Pile Driving Analyzer (PDA) is used to verify the results of the calculation. This study aims to calculate and analyze the bearing capacity of the foundation compared to the results of PDA. The method used is the Schmertmann & Nottingham method as well as the Mayerhoff method. The results of this study are carrying capacity using the Schmertmann & Nottingham method based on the results of the sondir test at the S1 point obtained a result of 804.15 tons, at the S2 sondir point the result was 761.99 tons, the S3 sondir point was 823.45 tons and at the S4 sondir point of 841.68 tons. The carrying capacity using the Meyerhoff method based on the results of the sondir test at the S1 point obtained a result of 572.39 tons, the S2 sondir point was 568.93 tons, the S3 sondir point was 568.84, and the S4 sondir point was 562.4 tons. The largest ultimate bearing capacity (Qu) value is obtained from the Schmertmann & Nottingham method at the sondir point S4, The smallest ultimate bearing capacity (Qu) value is obtained from the Meyerhoff method at the sondir point S4. The calculation results that show the least difference and are closest to the PDA are using the Meyerhoff method at the S4 sondir point and the BP-109 PDA with a difference of 115.5 tons. The Schmertmann & Nottingham method shows much greater results than PDA calculations
Correlation Study of Shrinkage Expansion Potential of Clay Soil In PLTMH Cileunca, Pangalengan, Bandung, Indonesia Kurniawan, Indra Fajar; Maulana, Ahmad Rizky Ananda; Naufal, Muhammad Faris; Rezeki, Ingrid Multi
Jurnal Ekonomi Teknologi dan Bisnis (JETBIS) Vol. 3 No. 11 (2024): Jurnal Ekonomi, Teknologi dan Bisnis
Publisher : Al-Makki Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57185/jetbis.v3i11.161

Abstract

Mini Hydro Power Plants (MHPs) utilize the potential of water to generate electrical energy. However, construction on clay soils that have the potential to expand and contract can affect the stability of the structure. This study aims to evaluate the potential for soil development in the Cileunca MHP. The methods used to determine soil development potential include Chen (1988), Skempton (1953), and Seeds (1962) methods. Mineral identification was conducted through X-Ray Diffraction (XRD) testing of soil samples taken by the handboring method. The results of the analysis showed that the Skempton method showed 67% of the samples had activity values > 0.75 (“high” category). The Chen method indicated 60% of the samples had a plasticity index (PI) > 35% (“very high” category). The Seeds method indicated 73% of the samples had a development potential > 25% (very high category). XRD testing indicated the dominant mineral was dehydrated Halloysite (Al2Si5(OH)4). The soil at the Cileunca MHP site has a high development potential that can damage building foundations. Foundation stability is strongly influenced by expansive soil properties, so soil stabilization treatment is needed to prevent structural damage. This study concludes that the soil at the Cileunca MHP site has a high development potential, which can cause structural problems. Therefore, soil stabilization treatment is highly recommended to ensure the stability of the building foundation
Inovasi Kerajinan Ecoprint Berbasis Lingkungan: Workshop Kreativitas untuk Pemberdayaan Perempuan Desa Padamenak Rezeki, Ingrid Multi; Meidelina, Alya Verda; Rahmah, Jasmine Aulia; Alfiyan, Mohammad Rosid; Yani, Sri
El-Mujtama: Jurnal Pengabdian Masyarakat  Vol. 5 No. 2 (2025): El-Mujtama: Jurnal Pengabdian Masyarakat
Publisher : Intitut Agama Islam Nasional Laa Roiba Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47467/elmujtama.v5i2.6599

Abstract

Padamenak Village, located in the Jalaksana District, covers an area of 33.130 hectares and is situated at an altitude of 500-600 meters above sea level, with a tropical climate. It consists of 2 RW (neighborhood units) and 6 RT (community units), divided into two hamlets: Dusun Padaasih and Dusun Padamulya. One of the initiatives for empowering women is the ecoprint craft training, which utilizes natural materials without harmful chemicals. Through this workshop, women are trained to create fabrics, bags, and accessories based on ecoprint, enhancing their skills and economic independence. This program not only enriches the art of handicrafts but also supports a sustainable creative economy.
Analysis of The Stability of The Temporary Tunnel Support Structure in The Excavation Phase of The Cipanas Dam Tunnel Rezeki, Ingrid Multi; prasetyo, singgihangga
Journal of Green Science and Technology Vol 8 No 2 (2024): Journal of Green Science and Technology Vol.8 No.2 September 2024
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v8i2.9438

Abstract

Dams are generally equipped with bypass tunnels. The circumvention tunnel functions to maintain the safety of the dam and can reduce excessive water pressure around the dam. This can help prevent collapse or damage to the dam structure due to excess pressure. The objectives of this research are to determine the implementation of making temporary support structures in tunnels, to obtain the maximum stress values that occur in temporary tunnel support structures, to obtain deformation values that occur in tunnels and safety factors related to the use of steel H Beam as reinforcement, to find out the results of stability analysis. tunnel temporary support structure. Method for analyzing soil stability during the installation of steel supports during the implementation of bypass channel work using the 2D plaxis program approach. The main stress in the Cipanas dam tunnel is tensile stress. The maximum tensile stress occurs at the top of the tunnel due to gravity and groundwater loads. Axial deformation in the Cipanas dam tunnel is deformation that occurs in the direction of the tunnel axis. Maximum axial deformation occurs at the top of the tunnel due to gravity and groundwater loads. Data from stress analysis and deformation analysis at Sta. 0+180.76 total stress -1.56*103kN/m2 relative shear stresses 0.99 deformed mesh 34.84*10-9 m scealead up 100.00*106 total displacement 34.86*10-9 E-mst 1.00, Sta. 0+280.76 total stress -2.82*103kN/m2 relative shear stresses 0.72 deformed mesh 613.16*10-6 m scealead up 10.00*103 total displacement 613.16*10-6 E-mst 1.00, Sta. 0+480.76 total stress -1.61*103kN/m2 relative shear stresses 1.00 deformed mesh 2.19*106 m scealead up 2.00*10-6 total displacement 2.19*106 E-mst 1.938 Keyword: Main Dam, Avoidance Tunnel, Stability.
Co-Authors Alfiyan, Mohammad Rosid Guntoro, Hardian Tri Hidayat, Fazry Hidayat, Rifky Arif Aziz Irfan, Mochammad Kurniawan, Indra Fajar Maulana, Ahmad Rizky Ananda Meidelina, Alya Verda Muhammad Faris naufal Prasetyo, Muhammad Hafizh prasetyo, singgihangga Rahmah, Jasmine Aulia Tejo, Abdurrachman Aryo Yani, Sri