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All Journal Engineering Science Letter Journal of Novel Engineering Science and Technology Anggapa
Muhammad Chofi Irnawan
Universitas Widya Kartika
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Model Desain Tata Ruang Bank Sampah dengan Pendekatan Arsitektur Perilaku di Dukuh Sutorejo Surabaya Risma Andarini; Shirleyana; Hana Rosilawati; Ririn Dina Mutfianti; Ary Dwi Jatmiko; Muhammad Chofi Irnawan
Jurnal Anggapa Vol 5 No 1 (2026): ANGGAPA Volume 5 No 1 April 2026
Publisher : Faculty of Engineering, Widya Kartika University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61293/anggapa.v5i1.957

Abstract

Permasalahan pengelolaan sampah di kota besar terus meningkat karena volume sampah yang semakin bertambah dan tidak sebanding dengan kecepatan tindakan pengolahan sampah. Pengelolaan sampah berbasis masyarakat melalui bank sampah menjadi salah satu strategi penting dalam mengurangi timbulan sampah perkotaan. Namun, banyak bank sampah belum didukung oleh desain tata ruang yang optimal sehingga berdampak pada alur aktivitas yang kurang efektif, ketidaknyamanan pengguna, dan rendahnya partisipasi masyarakat. Studi model desain tata ruang bank sampah ini bertujuan untuk menghasilkan model desain tata ruang bank sampah berbasis pendekatan arsitektur perilaku di Kelurahan Dukuh Sutorejo. Artikel ini menggunakan metode observasi lapangan, wawancara, dan zonasi mapping untuk mengidentifikasi alur aktivitas yang efektif. Model desain yang diusulkan mengintegrasikan aspek zonasi, sirkulasi, kenyamanan ruang berdasarkan perilaku pengguna. Model desain bank sampah ini diharapkan dapat diaplikasikan untuk menjawab kebutuhan bank sampah unit di area kelurahan serta mendorong partisipasi masyarakat untuk mengurangi sampah.
Behavioral Study of Soft Soil Beneath the Embankment Improved by Columns Derived from Recycled Concrete Aggregate and High-Calcium Fly Ash-Based Geopolymer Muhammad Chofi Irnawan; Reysha Rizki Amanda Lubis
Engineering Science Letter Vol. 5 No. 03 (2026): Engineering Science Letter - Articles in Press
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/IISTR.esl.002462

Abstract

Soft clay poses geotechnical challenges, not only due to its high water content, but also caused by high compressibility, low permeability, low bearing capacity, and low shear parameters, which might damage the upper structure of the building. Although column reinforcement methods, such as deep soil mixing, bottom ash columns, and cement soil columns, have been widely used for ground improvement, the performance of geopolymer concrete column (GCC) with recycled concrete aggregate remains under explored. This study aims to analyze embankment behavior on soft soil by reviewing settlement, the embankment safety factor, and the time required to reach a 90% degree of consolidation, both before and after reinforcement with geopolymer columns. Numerical simulations were conducted using a two-dimensional finite element method (FEM) in PLAXIS 2D software under plane-strain conditions. The parameters used in the modeling were soil parameters and geopolymer column (GPC) reinforcement adopted from previous research. The FEM analysis showed that GPCs can reduce consolidation settlement, accelerate consolidation rates, and increase the overall stability safety factor of the embankment system.
Influence of U-Shape Row Pile Configuration to Mitigate Steep Slope Failure: A Numerical Study Muhammad Chofi Irnawan; Muhammad Shofwan Donny Cahyono
Journal of Novel Engineering Science and Technology Vol. 5 No. 03 (2026): In Press - Journal of Novel Engineering Science and Technology
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/jnest.v5i03.2480

Abstract

Landslide is a major problem in the field of geotechnical engineering, particularly in steep areas such as mountainous regions. In areas with steep topography, soil masses or rocks are unable to withstand the force of gravity and external forces acting on the slope, resulting in the movement of rock and soil. These materials move down the slope in the form of fragments, flows, and cascades over a wide area. Therefore, reinforcement is required to prevent collapse. One commonly used reinforcement method is pile. The pile installation patterns frequently employed are parallel arrangements in single and double rows. However, there has been no installation using a U-shaped configuration. Thus, this study aims to numerically analyze the stability of a slope reinforced with piles in a U-shaped configuration and compare it with the existing slope conditions without reinforcement. The method used is finite element analysis with the strength reduction method (SRM). The software used in the numerical analysis is Plaxis 2D. The results of SRM numerical analysis show that reinforcement with a double contiguous U-shaped pile system is capable of improving slope stability. This is indicated by an increase in the safety factor (FoS) value of up to 57% compared to the unreinforced slope.
Co-Authors Andarini, Risma Ary Dwi Jatmiko Hana Rosilawati Muhammad Shofwan Donny Cahyono Reysha Rizki Amanda Lubis Ririn Dina Mutfianti Shirleyana