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All Journal Jurnal SOLMA Journal Innovation of Civil Engineering (JICE)
Saefudin, Ruli
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Civil Engineering, Building, Construction & Architecture Energy Engineering Environmental Science Transportation Other

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Retaining Wall Innovation of Stone and Reinforced Concrete to Stand Guard Against Landslides and Earthquakes Cahyono, Heru Setiyo; Arifin, Achmad Saiful; Ingsih, Ita Suhermin; Saefudin, Ruli; Mustofa, Imam
Journal Innovation of Civil Engineering (JICE) Vol 6 No 1 (2025)
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/jice.v6i1.23487

Abstract

In the landslide–prone terrains of Puri District, East Java, engineers have crafted a groundbreaking solution to a life–threatening problem: a hybrid retaining wall that fuses traditional batu kali masonry with reinforced concrete, designed to outlast both relentless soil creep and violent earthquakes. Standing 4.25 meters tall and stretching 20 meters across a fragile slope, this structure—embedded 1.5 meters into the earth—defies seismic forces amplified by climate change, withstanding horizontal accelerations of 0.19g and shear forces that spike 388% during quakes. Rigorous analysis reveals its secret: D16 steel bars, spaced as tight as 100 mm at stress hotspots, work in concert with locally quarried stone to balance cost and resilience. The wall’s success lies in numbers—sliding safety factors of 4.02 (normal) and 1.78 (seismic), bearing pressures grazing 99.9% of limits without failure—but its true victory is human. Shielding a riverside community from catastrophic landslides, it ensures roads stay open, homes remain intact, and daily life flows uninterrupted. As Indonesia battles rising rainfall and tectonic unrest, this innovation offers a replicable blueprint: marrying ancestral building wisdom with 21st–century engineering to turn vulnerability into durability. Keywords: Retaining Wall; Seismic Condition; Landslide Mitigation; Masonry Structure; Sustainable Infrastructure.
EVALUASI JUMLAH DAN BIAYA OPERASIONAL ALAT BERAT PADA PROYEK REVITASLISASI SUNGAI (Studi Kasus Proyek CWP – 3DJK Wulan River Improvement Works Package III, BBWS Pemali–Juana, Kabupaten Demak–Kudus–Jepara, Jawa Tengah) Khomsiati, Nur Latifah; Cahyono, Heru Setiyo; Ihwalrezky, Zhagheta; Saefudin, Ruli
Journal Innovation of Civil Engineering (JICE) Vol 6 No 1 (2025)
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/jice.v6i1.23532

Abstract

This study evaluates the quantity and operational costs of heavy equipment in the Wulan River Revitalization Project (CWP–3DJK) across Demak, Kudus, and Jepara, aiming to identify factors hindering efficiency and performance. Using a mixed–methods case study (quantitative analysis, field observations, interviews, and document reviews), results show Excavator productivity dropped 14.3% from theoretical standards (12.67 m³/hour vs. 14.57 m³/hour), mainly due to 22% non–technical downtime from heavy rainfall, excessive sedimentation, and social conflicts. Operational costs exceeded the budget by 12.5% (Rp. 14.8 billion), driven by fuel (42%) and emergency maintenance on muddy terrain. Equipment imbalance (4 Excavators vs. 11 dump trucks) caused loading queues, reducing dump truck efficiency by 18%. Constraints included technical (sedimentation), environmental (rainfall), and social (protests), with social factors contributing 18% downtime—often overlooked in past studies. Recommendations include swamp–type excavators, 10–15% contingency funds in the Budget Plan (QS), and community dialogue forums to reduce conflicts. Practical benefits include improved budget efficiency (<5% deviation), reduced social downtime, and IoT–based real–time monitoring. Findings emphasize the need for an integrated approach combining technical, environmental, and community participation to ensure sustainable infrastructure project success in Indonesia. Keywords: Heavy Equipment; Operational Costs; River Revitalization; Productivity; Project Management.
Efektivitas Penyuluhan Program Digitalisasi pada Industri Rumahan Produksi Keripik Pisang Leunah Lumajang Fitriyanti, Ade; Bashiroh, Ainin; Anggraini, Arisca Putri; Mushriroh, Rizna Zulfa; Saefudin, Ruli
Jurnal SOLMA Vol. 15 No. 1 (2026)
Publisher : Universitas Muhammadiyah Prof. DR. Hamka (UHAMKA Press)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/solma.v15i1.19725

Abstract

Background: The home-based banana chips industry, Keripik Pisang Leunah, in Lumajang Regency, faces challenges with production efficiency and limited market reach due to its conventional production processes. Through this community service program, the Abdimas team from the Islamic University of Malang aims to implement a digitalization program to improve production efficiency and expand marketing reach, enabling the business to adapt to technological advancements. Methods: The program was implemented using a participatory approach through training and direct mentoring of partners, including training in banana-slicing machines, optimization of social media and marketplace platforms, and digital bookkeeping. Results: The activity showed significant improvements in partners’ managerial and marketing capacities, marked by a 72% increase in the effectiveness of digital media use, a 64% improvement in financial record-keeping efficiency, a 35% increase in income, and a 30% increase in production output. Conclusion: This activity confirms that digitalization can enhance the self-reliance of small enterprises, strengthen the competitiveness of home industries, and contribute to achieving SDGs 1 and 8, which focus on poverty alleviation and sustainable economic growth.
Co-Authors Ainin Bashiroh Anggraini, Arisca Putri Arifin, Achmad Saiful Fitriyanti, Ade Heru Setiyo Cahyono Ihwalrezky, Zhagheta Imam Mustofa Ita Suhermin Ingsih Khomsiati, Nur Latifah Mushriroh, Rizna Zulfa