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All Journal Jurnal Cahaya Mandalika JOURNAL SCIENTIFIC OF MANDALIKA (JSM) Journal of Mandalika Literature
Sumirin
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Humanities Languange, Linguistic, Communication & Media Social Sciences Other

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Analisis Pola Deformasi Tanah Pembangunan Kawasan Ekonomi Khusus Mandalika Didik Nugroho; Abdul Rochim; Sumirin
Journal of Mandalika Literature Vol. 5 No. 4 (2024)
Publisher : Institut Penelitian dan Pengembangan Mandalika (IP2MI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/jml.v5i4.3511

Abstract

The development of infrastructure in KEK Mandalika has increased rapidly between 2020 and 2023. This has led to changes in soil morphology and potential geotechnical deformations. The methodology includes high-level geodetic monitoring technology, analysis of results, and numerical modeling to understand the holistic dynamics of soil changes. The detailed survey results and data analysis reveal that soil deformation in KEK Mandalika is not only local but also shows significant regional patterns. Deformation patterns are influenced by various factors such as soil type, topography, land use, and human activities. The monitoring data shows an average shift of 0.035 m per year in the X-axis and 0.015 m per year in the Y-axis recorded during that period. Additionally, the Z-axis shows a decrease of -0.015 m per year Peningkatan pesat dalam pembangunan infrastruktur di Kawasan Ekonomi Khusus (KEK) Mandalika selama periode 2020-2023 telah memunculkan kompleksitas baru terkait perubahan morfologi tanah dan potensi deformasi geoteknik. Metodologi yang digunakan mencakup penggunaan teknologi pemantauan geodetik tingkat tinggi, analisis hasil, serta model numerik untuk memahami dinamika perubahan tanah secara holistik. Hasil survei dan analisis data yang terperinci mengungkapkan bahwa deformasi tanah di KEK Mandalika tidak hanya bersifat lokal tetapi juga menunjukkan pola regional yang signifikan. Pola deformasi dipengaruhi oleh berbagai faktor seperti jenis tanah, topografi, penggunaan lahan, dan aktivitas manusia. Hasil monitoring data diperoleh rata-rata pergeseran sumbu X sebesar 0.035 m pertahun dan sumbu Y sebesar 0.015 m per tahun yang tercatat selama periode tersebut. Selain itu, juga diperkirakan terjadi penurunan pada sumbu Z dengan nilai mencapai -0.015 m per tahun.
Studi Metode Perkuatan Lereng Menggunakan Soil Nailing Dan Shotcrete (Studi Kasus: Lereng Off Ramp Karawang Barat Pada Ruas Jalan Tol Jakarta -Cikampek ) Fento Hara; Abdul Rochim; Sumirin
Journal Scientific of Mandalika (JSM) e-ISSN 2745-5955 | p-ISSN 2809-0543 Vol. 6 No. 5 (2025)
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia (IP2MI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/10.36312/vol6iss5pp1454-1465

Abstract

Landslides that occur on slopes can be caused by several influences, both human and natural influences. There are also several ways to handle slopes, adjusting the type of soil at the handling location and its function and purpose. The reinforcement method using Soil Nailing and shotcrete is one alternative choice for strengthening slopes. The purpose of this study is to determine the value of the safety factor of the existing slope before reinforcement with Soil Nailing and shotcrete and the value of the safety factor of the slope after reinforcement with Soil Nailing and shotcrete on the slope of the West Karawang Off Ramp, Jakarta - Cikampek Toll Road. Slope stability analysis using the Plaxis.2D program (finite element method). At this stage, the existing conditions are analyzed for slope stability with a pavement load of 10 kPa and earthquake loads.The results of the analysis of the existing slope before reinforcement with Soil Nailing and Shotcrete, the condition of the existing embankment is still with a safety factor value in the short-term condition of no water level (dry) namely (SF = 1.328) > 1.30 safe (Stable) in the safety factor condition C = 0 seismic / earthquake collapse occurs (SF = 0.88) < 1.0 has the potential for landslides (unsafe) and the safety factor in the long-term condition of water-saturated conditions is (SF = 1.221) < 1.50 has the potential for landslides (unsafe) So the slope needs to be repaired and strengthened. Analysis Results after reinforcement using Soil Nailing and Shotcrete, the results of the slope stability analysis showed a short-term safety factor for short-term conditions without water level (dry) namely (SF = 1.823)> 1.30 Safe (stable), in the safety factor for section C = 0 seismic / earthquake conditions namely (SF = 1.130)> 1.0 safe (stable) and the safety factor for long-term conditions (Saturated water) namely (SF = 1.759)> 1.50 Safe (stable).
Analisis Penjadwalan Proyek Menggunakan Metode Pert Dan Fast Track Dari Hasil Pembangunan Kek Mandalika Paket 1 Nano Suharyono; Rachmat Mudiyono; Sumirin
Journal of Mandalika Literature Vol. 6 No. 3 (2025)
Publisher : Institut Penelitian dan Pengembangan Mandalika (IP2MI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/jml.v6i3.3883

Abstract

Development in the Mandalika Special Economic Zone (KEK) has several work packages, one of which is Package 1 which during the implementation process there were several obstacles that had a major impact on the postponement of the planned construction schedule for the project running from June 15, 2024 to June 10, 2023, postponed to September 30, 2023. The PERT method itself is to find out the time needed for the construction of package 1. The result is that there is a difference in the time needed to complete the MUTIP Package 1 project. For the Baseline for the completion time of the MUTIP package 1 work, it is known that the planned completion time is 831 days or starting from June 15, 2021 to June 10, 2023 (accuracy 86.62%). Meanwhile, the completion time of the work after being calculated using the PERT method requires a completion time of 831 days starting from June 15, 2021 to September 24, 2023 (accuracy 99.28%). and the acceleration carried out using the Fast Track method is known to require 724 days. So it can be concluded that the calculation of time using the PERT method and acceleration using the Fast Track method is more effective when used for the conditions that occur in the MUTIP Package 1 development project at the Mandalika Special Economic Zone.
ANALISIS SIFAT-SIFAT MEKANIS BETON SELF COMPACTING CONCRETE (SCC) DENGAN PENAMBAHAN FILLER ABU ECENG GONDOK Muhamad Yusuf Khanafi; Sumirin; Kartono Wibowo
Jurnal Cahaya Mandalika ISSN 2721-4796 (online) Vol. 3 No. 1: Jurnal Cahaya Mandalika
Publisher : Institut Penelitian Dan Pengambangan Mandalika Indonesia (IP2MI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/jcm.v3i1.1872

Abstract

Water hyacinth is an aquatic plant considered as a pest and difficult to eradicate due to its fast growth and strong resilience. However, water hyacinth also contains high fiber content, and the ash resulting from its combustion contains silica that can be used as a concrete additive. This research aims to evaluate the influence of adding water hyacinth ash on the mechanical properties of self-compacting concrete (SCC), such as compressive strength, flexural strength, and split tensile strength. Concrete is a commonly used structural material in various construction projects, and SCC is an innovative type of concrete that can self-compact without the need for a vibrating tool. In this study, data collection was conducted through literature review from various sources, including journals, theses, books, and the internet. Additionally, laboratory testing was performed to examine the coarse and fine aggregates and determine the effects of water hyacinth ash addition on compressive strength, flexural strength, split tensile strength, and modulus of elasticity. The research findings indicate that the addition of 5% water hyacinth ash results in a decrease in compressive strength by 2.008 MPa. However, adding 10% water hyacinth ash can increase compressive strength by 1.02 MPa. Split tensile strength also experiences an increase of 0.255 MPa with a 5% addition of water hyacinth ash and an increase of 0.669 MPa with a 10% addition. On the other hand, flexural strength increases by 0.515 MPa with a 5% addition of water hyacinth ash but decreases by 1.006 MPa with a 10% addition.
Co-Authors Abdul Rochim Didik Nugroho Fento Hara Kartono Wibowo Muhamad Yusuf Khanafi Nano Suharyono Rachmat Mudiyono