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All Journal Jurnal Konstruksia Rekayasa Sipil Jurnal Geografi, Edukasi dan Lingkungan Rancang Bangun Menara: Jurnal Teknik Sipil Jurnal Rekayasa Lingkungan Publikasi Riset Orientasi Teknik Sipil (Proteksi) Abdimas: Papua Journal Of Community Service Teknika Jurnal Pengabdian Kolaborasi dan Inovasi IPTEKS SLUMP TeS : Jurnal Teknik Sipil ETERNITAS Jurnal Ilmiah Teknik Sipil (JIMATS)
Asrul Saputra
Universitas Muhammadiyah Sorong
Agriculture, Biological Sciences & Forestry Humanities Astronomy Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Social Sciences Transportation Other

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Journal : Rancang Bangun

 1 
ANALISIS STABILITAS LERENG DI JALAN AHMAD YANI NO. 49, KOTA SORONG MENGGUNAKAN SOFTWARE ROCSLIDE Islami, Anisul; Saputra, Asrul Saputra; Puspa Rini, Retno; Rokhman; Januar Jafaruddin, Ahmad
Jurnal Teknik Sipil : Rancang Bangun Vol. 10 No. 2 (2024): Oktober 2024
Publisher : Universitas Muhammadiyah Sorong

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Abstract

Vihara Budha Jayanti which is one of the natural attractions and is also a place of worship of Buddhists in the city of sorong which is geographically located on hills that have the potential for landslides because the slope of the area is included in the steep category with a slope angle of 51°. The purpose of this study was to evaluate the slope stability of the most potential landslide areas in the area. Slope stability analysis was done manually or using Rocslide software with Fellenius method as a comparison to determine the lowest safety factor in critical collapse areas. In this analysis, input data of soil parameters from the laboratory, such as the weight of the soil, cohesion and the angle of friction are needed. Based on the results of the analysis obtained safety factor (SF) slopes in saturated conditions using Rocslide software of 0,85 (SF < 1,25) and manual calculation of 0,60 (SF < 1,25). From these two calculations it can be concluded that unstable slopes or landslides are common because the value of the safety factor (FS) < 1,25.
PENGARUH STABILISASI TANAH LEMPUNG DENGAN BAHAN TAMBAH KAPUR TERHADAP KUAT GESER Jafaruddin, Ahmad januar; Rokhman, Rokhman; pristianto, hendrik; saputra, asrul; abidin, zainul
Jurnal Teknik Sipil : Rancang Bangun Vol. 11 No. 01 (2025): April 2025
Publisher : Universitas Muhammadiyah Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33506/rb.v11i01.4381

Abstract

Penelitian ini dilakukan untuk mengetahui pengaruh penambahan kapur terhadap peningkatan kuat geser tanah lempung. Stabilisasi tanah adalah suatu usaha untuk memperbaiki sifat tanah secara teknis dengan bahan-bahan tertentu untuk meningkatkan kapasitas dukung tanah. Tanah lempung dengan plastisitas tinggi cenderung bermasalah karena mempunyai sensitivitas yang tinggi terhadap perubahan kadar air, sehingga menyebabkan kuat geser tanah tersebut rendah. Untuk itu perlu dilakukan stabilisasi tanah dengan penambahan kapur. Pada penelitian ini tanah yang digunakan berasal dari Jalan Makam, Kelurahan Malason, Distrik Aimas, Kabupaten Sorong. Pengujian tanah ini terdiri dari pengujian fisik dan mekanis. Efektivitas stabilisasi tanah lempung dengan penambahan kapur dapat dilihat pada pengujian utama yaitu Uji Geser Langsung (Direct Shear Test) dengan variasi pencampuran kapur sebesar 5%, 10%, 15% dan 20%. Dari hasil penelitian didapatkan nilai optimum dengan pemeraman 7 hari pencampuran kapur pada variasi 10% dengan nilai kohesi 0.186 (kg/cm2), sudut geser 28.95° dan tegangan geser 0.401 (kg/cm2). Berdasarkan hasil penelitian menunjukkan penambahan kapur dapat meningkatkan nilai kohesi dan sudut geser tanah lempung.
PENGUJIAN MODEL PRISTIANTO UNTUK MEMPREDIKSI LAJU INFILTRASI DI SUB DAS KLAWALAL KELURAHAN MAKOTYAMSA Hendrik Pristianto; Asrul Saputra; Fatimah Putri Maharani; Achmad Rusdi; Ahmad Januar Jafaruddin
Jurnal Teknik Sipil : Rancang Bangun Vol. 11 No. 02 (2025): Oktober 2025
Publisher : Universitas Muhammadiyah Sorong

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Abstract

Infiltration is the process of water entering the soil and plays a vital role in groundwater recharge, flood control, and water resource management. A decrease in infiltration rate due to land use changes has become a serious concern, especially in small watersheds such as the Klawalal Sub-Watershed in Makotyamsa. The Pristianto Model was developed to predict infiltration rates in small watersheds by modifying the Kostiakov Model with the addition of soil moisture, porosity, and sand content variables, making it more suitable for local conditions. This study aims to evaluate the performance of the Pristianto Model at six observation points with soil texture variations including Sandy Loam, Clay Loam, and Sandy Clay Loam. Field data were collected using the double ring infiltrometer method, supported by laboratory testing of physical soil properties. The model was validated using graphical analysis and statistical evaluation with NSE and RSR indicators. The results showed that the Pristianto Model successfully predicted infiltration rates at most observation points. With NSE values > 0.75 and RSR < 0.5, the model demonstrated high accuracy. Therefore, the Pristianto Model is recommended as a predictive tool for infiltration rates in small watersheds with similar characteristics.
Co-Authors Achmad Rusdi Agung Pamudjianto Ahmad Januar Jafaruddin Ahmad Januar Jafarudin Alexander Herry Rumawak Alfina Maysyurah Andy Mansyur C. Seme, Alan Dea Annisa Desembardi, Faried Desembardi, Faried Desember, Faried Didik Setyo Purwantoro Dwi Guntoro Edy Purwanto fahira aulia Farida, Anif Fatimah Putri Maharani Haurissa, Prita Herlina Arifin Iqbal Iqbal Iqbal Iqbal Iqbal Islami, Anisul Jafarudin, Ahmad Januar Klau, Jefrianus M. Arief Ramadhan Makaliwe, Gabby K. K. Mawarsari, Nila Mierta Dwangga Miftahul Fauziah Mirzan Nasil La Apa Muhammad Nur Fajar Muhammad Rusmin Muhammad Rusmin Muhammad Rusmin, Muhammad Nurbia Pristianto, Hendrik Purwanto, A Didik Setya Puspa Rini, Retno Rahmatullah, Azwar Retno Puspa Rini Retno Puspa Rini Rini, Retno Puspa Riskawati Rokhman Rokhman Rokhman, Rokhman Rusmin Rahman Sigarlaki, Ester Slamet Widodo Slamet Widodo Suherman, Alan Sukowati, Dwi Guntoro Valens Widya, Mitha Zainul Abidin