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All Journal Teknik Sipil dan Arsitektur IPTEK Journal of Proceedings Series Jurnal Konstruksia Briliant: Jurnal Riset dan Konseptual Teras Jurnal RACIC : Rab Construction Research AGREGAT Jurnal Pensil : Pendidikan Teknik Sipil Jurnal Desain EPI International Journal of Engineering Border: Jurnal Arsitektur Jurnal Teslink : Teknik Sipil dan Lingkungan International Journal of Eco-Innovation in Science and Engineering (IJEISE) JITSi : Jurnal Ilmiah Teknik Sipil Jurnal Penelitian Rumpun Ilmu Teknik Indonesian Journal of Multidisciplinary on Social and Technology Jurnal Sains dan Teknologi Media Konstruksi : Jurnal Ilmiah Teknik Sipil Jurnal Ilmiah Teknik Sipil Open Access DRIVERset Jurnal Teknik Sipil
Yerry Kahaditu Firmansyah
Department Of Civil Engineering, Faculty Of Engineering And Science, Universitas Pembangunan Nasional “Veteran” Jawa Timur.
Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences Transportation Other

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Modification of Reinforced Concrete Retaining Wall at Pilangbango Reservoir Construction Project Madiun, East Java Mudji Irmawan; Yerry Kahaditu Firmansyah; Afif Navir Refani
IPTEK Journal of Proceedings Series No 1 (2017): The 2nd International Conference on Civil Engineering Research (ICCER) 2016
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2017i1.2205

Abstract

The reservoir is the tendon of water in order to accommodate the excess rain water in the rainy season and its utilization in the dry season for various purposes, both in the field of agriculture as well as the interests of the community. To find out the cause of the crack wall of the reservoir Pilangbango Madiun, East Java, then do the test strongly press on concrete walls and soil investigations on the area of the reservoir. Spunpile 400 mm in diameter used by the mounting distance 200 cm and a depth of 12 m and pole mounted on the heels of concrete walls. Manual calculation of the results and analysis of the Finite Element program it can be concluded that in the presence of an additional retaining her 400 spunpile mm using a distance 200 cm and a depth of 12 m, retaining wall construction is then quite able to hold style pillow case and Sliding with style has a safety factor more than 1.5. So the movement of the sliding walls do not happen again.
Analisis Settlement Timbunan Causeway dan Container Yard pada Pembangunan Terminal Multipurpose Labuhan Bajo di Manggarai Barat, Nusa Tenggara Timur Yerry Kahaditu Firmansyah
Jurnal TESLINK : Teknik Sipil dan Lingkungan Vol 5 No 2 (2023): Next Issue on, September 2023
Publisher : Universitas Nusa Putra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52005/teslink.v5i2.276

Abstract

The Labuhan Bajo Multipurpose Terminal, located in West Manggarai, East Nusa Tenggara, has a very important strategic value as the main transportation hub for domestic and international trade. With the increasing demand for the efficient handling of cargo and passenger traffic, the construction of well-designed causeways and container yards is essential to ensure the terminal's long-term functionality and stability. The main objective of this study is to evaluate potential settlement patterns, identify potential risks associated with soil deformation, and propose appropriate mitigation measures to ensure safe and sustainable operation of the terminal. The findings from this research explain the importance of a thorough settlement analysis in large-scale infrastructure projects, especially those involving causeways and container yards. By understanding the response potential of the soil and implementing effective mitigation measures, engineers, contractors and policy makers can increase the resilience of terminals, minimize adverse impacts and ensure their long-term viability.
STUDY OF PREFERENCES FOR STUDENT COMMUNAL SPACE IN THE UPN VETERAN JAWA TIMUR Azkia Avenzoar; Dominikus Aditya Fitriyanto; Yerry Kahaditu Firmansyah
Border: Jurnal Arsitektur Vol. 6 No. 1 (2024): JUNE 2024
Publisher : Department of Architecture, Faculty of Architecture and Design, Universitas Pembangunan Nasional "Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/border.v6i1.766

Abstract

The communal space for students in the university is important to support academic activities, considering that student activities on campus are not only in classrooms, studios, laboratories, and libraries. However, these shared areas are often poorly designed, leading to disruptions and discomfort for users. This research aims to gather preferences for student communal spaces at UPN "Veteran" Jawa Timur. The research objectives include identifying perceptions of the availability of student communal spaces and the activities carried out in these spaces. Furthermore, it aims to identify expectations for the atmosphere and facilities in these communal spaces. The results of the analysis of these expectations for the atmosphere and facilities are then linked to the types of activities. This research is conducted using a qualitative method. Data is collected through online questionnaires distributed to UPN "Veteran" Jawa Timur students and then analyzed using content analysis with stages including open coding, axial coding, and selective coding. The results show that psychological atmosphere factors, as well as thermal, auditory, and visual comfort, are dominant in the desired atmosphere by respondents. Additionally, the expected facilities are electronic and electrical.
PERENCANAAN PERKUATAN LERENG MENGGUNAKAN SHEET PILE SEBAGAI ALTERNATIF DINDING PENAHAN TANAH LERENG JEMBATAN KACA KAB.PROBOLINGGO Dwi Septy Wahyuningdiah; Laily Endah Fatmawati; Yerry Kahaditu Firmansyah
Racic : Rab Construction Research Vol. 8 No. 2 (2023): DESEMBER
Publisher : LPPM Universitas Abdurrab

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36341/racic.v8i2.3626

Abstract

Slopes are the plains of the earth that create an angle of inclination on the horizontal side. Slopes are formed in two ways, naturally (geological processes) or man-made. Several ways that can be used to avoid the formation of collapse are retaining walls by identifying the effect of the safety factor on slope stability under existing conditions. In this study it was intended to plan slope reinforcement using sheet piles with the help of the plaxis program and using the manual calculation of the fellenius method to determine the safety factor for slope stability to overcome landslide disasters on glass bridges. The results of this study are the results of the analysis of the factor of safety from manual fellenius calculations and using the help of the Plaxis software before being given reinforcement and after being given sheet pile reinforcement.
Tinjauan Kebutuhan Geotextile pada Timbunan Tinggi di atas Tanah Lunak Achmad Firman Maulana; Evandra Sebastian; Yerry Kahaditu Firmansyah
Jurnal Penelitian Rumpun Ilmu Teknik Vol. 4 No. 1 (2025): Jurnal Penelitian Rumpun Ilmu Teknik
Publisher : Pusat Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/juprit.v4i1.4657

Abstract

The process of embankment of the road body aims to create a safe and comfortable transportation route. However, the slopes on the road body often have limited stability and are susceptible to construction failure. The researcher intends to review the stability of the slope on the embankment with various variations in embankment height against the stability of embankment soil located on soft soil with a fairly deep depth. The need for geotextile reinforcement is influenced by the condition of the base soil itself. In geotextiles with the same Tult, the Tult of geotextiles used for all variations of embankment height in this study is 50 kN. The need for the number of geotextiles with the same embankment width and different variations in embankment height, the higher the embankment, the more geotextiles are needed.
Effect of Fosroc Cebex-100 and Fly Ash Stabilization on the Microstructural Properties of Soft Soil Farichah, Himatul; Firmansyah, Yerry Kahaditu; Puspitasari, Nia Dwi; Damayanti, Apta Kania
International Journal of Eco-Innovation in Science and Engineering (IJEISE) Vol. 5 No. 2 (2024): IJEISE
Publisher : UPN Veteran Jatim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/ijeise.v5i2.133

Abstract

This study investigates the microstructural effects of stabilizing soft soil using fly ash and Fosroc Cebex-100. The soft soil used in this study was collected from the construction site of the Northern Ring Road (JLU) Section 1 in Lamongan regency. Firstly, a series of laboratory soil test was performed to obtain the index properties of the soil sample including unit weight, specific gravity, Atterberg’s limits, optimum moisture content, and maximum dry unit weight. The soil was then treated with three variations of fly ash (20%, 25%, and 30%), while the Fosroc Cebex-100 dosage was held constant at 0.45% of the fly ash weight. A CBR test indicated that a 20% fly ash and Fosroc Cebex-100 mixture achieved the highest CBR value. Consequently, this optimal mix was selected for SEM-EDX (Scanning Electron Microscopy - Energy-Dispersive X-ray Spectroscopy) analysis to further examine microstructural characteristics. Additional fly ash and Fosroc Cebex-100 to the soft soil will influence the microstructural properties of the soil. SEM analysis show that addition of fly ash and Fosroc Cebex-100 results in significant changes in the soil matrix, including increased particle bonding, reduced porosity, and a denser overall structure. Moreover, the addition of fly ash and Fosroc Cebex-100 contribute to the presence of iron (Fe) in the treated soil.
Pengaruh Beban Gempa Terhadap Stabilitas Lereng Dengan Perkuatan Dinding Penahan Tanah Tipe Kantilever Ramadhan, Arya Galih; Firmansyah, Yerry Kahaditu; Farichah, Himatul
Konstruksia Vol 16 No 2 (2025): Jurnal Konstruksia Vol 16 No. 2 Tahun 2025
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jk.16.2.107-117

Abstract

Indonesia merupakan negara dengan tingkat kerentanan tinggi terhadap gempa bumi akibat posisinya pada zona pertemuan tiga lempeng tektonik utama. Salah satu wilayah yang terdampak adalah Tulungagung, Jawa Timur, yang menjadi lokasi proyek pembangunan Jalan Lintas Selatan Lot 1A pada segmen STA 4+550. Pada lokasi ini, terdapat lereng di sisi bawah bahu jalan yang diperkuat menggunakan dinding penahan tanah tipe kantilever. Penelitian ini bertujuan untuk menganalisis pengaruh beban gempa terhadap stabilitas lereng yang diperkuat dengan dinding penahan tanah tipe kantilever tersebut. Analisis stabilitas lereng eksisting dilakukan secara manual, kemudian untuk dengan beban gempa dilakukan menggunakan program bantu GeoStudio. Parameter tanah yang digunakan diperoleh dari hasil uji borelog yang kemudian dikorelasikan berdasarkan standar korelasi dari Kementerian Pekerjaan Umum dan Perumahan Rakyat dan buku oleh Das. Hasil analisis menunjukkan bahwa pada kondisi tanpa beban gempa, lereng eksisting memiliki faktor keamanan yang memenuhi persyaratan SNI 8460:2017, yaitu potensi penggulingan, penggeseran, dan keruntuhan daya dukung masing-masing mendapatkan nilai sebesar 4,93; 6,04; dan 9,72. Namun, setelah mempertimbangkan beban gempa dengan nilai percepatan tanah maksimum (PGA) sebesar 0,4643g dan percepatan gempa terkoreksi (PGAM) sebesar 0,557g, faktor keamanan global lereng menurun menjadi 0,891, yang mengindikasikan nilai angka keamanan bawah batas minimum yang dipersyaratkan sebesar 1,1. Hal ini menunjukkan bahwa lereng tidak aman terhadap beban gempa dan diperlukan evaluasi terhadap desain dinding penahan tanah tipe kantilever untuk memastikan stabilitas lereng sesuai standar keamanan yang berlaku.  Dilakukan penambahan geotekstil pada area timbunan menghasilkan peningkatan nilai faktor keamanan terhadap beban gempa, dari 0,897 menjadi 1,186. Peningkatan ini mengindikasikan bahwa lereng tersebut telah memenuhi persyaratan keamanan terhadap beban gempa sebagaimana ditetapkan dalam standar, yaitu dengan nilai minimum sebesar 1,1.
Stabilisasi Tanah Lunak Menggunakan Geopolimer untuk Meningkatkan Nilai CBR Subgrade Prasetyo, Querida Addisty; Firmansyah, Yerry Kahaditu; Farichah, Himatul
BRILIANT: Jurnal Riset dan Konseptual Vol 10 No 3 (2025): Volume 10 Nomor 3, Agustus 2025
Publisher : Universitas Nahdlatul Ulama Blitar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28926/briliant.v10i3.2030

Abstract

Clay soil is a type of cohesive soil with low bearing strength, so it requires improvement through a stabilization process. The aim of this research is to identify changes in the physical and mechanical properties of soil with the addition of geopolymer composed of fly ash and alkali activator. The case study in this research is the Lamongan STA 1+270 northern ring road project. The geopolymer variation used consists of fly ash with percentages of 10%, 15% and 20%, with alkali activator sodium silicate (Na2SiO3) and sodium hydroxide (NaOH) 8M with a ratio of 1:1. The test method applied in this research involves testing physical and mechanical properties, including measuring water content, specific gravity, Atterberg limit, plasticity index, and California bearing ratio (CBR) in the laboratory. This research shows that the addition of 15% fly ash and alkali activator provides the most optimal CBR value of 8.23%, an increase from the original soil CBR value of 5.87%. This CBR value indicates that the addition of geopolymer to soft soil can improve the characteristics of the soil. This research concludes that the use of geopolymer can improve the quality of clay soil.
Kajian Dewatering Sebagai Metode Darurat Pengairan Saluran Sekunder di Gumbasa, Sulawesi Tengah Firmansyah, Yerry Kahaditu; Trilita, Minarni Nur
Teras Jurnal : Jurnal Teknik Sipil Vol. 13 No. 2 (2023): Volume 13 Nomor 2, September 2023
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v13i2.947

Abstract

Abstrak Sebagai negara agraris, masyarakat Indonesia banyak menggantungkan hidupnya pada sektor pertanian. Dalam pertanian, irigasi sangatlah penting untuk memastikan hasil tani sekaligus mengembangkan sektor pertanian. Untuk itu, Daerah Irigasi Gumbasa, Palu, Sulawesi Tengah dilakukan rehabilitasi di saluran primer. Namun saat proses rehabilitasi berjalan, saluran sekunder ke bawahnya tetap memerlukan aliran air irigasi agar tidak mengganggu pertanian yang dialirinya. Oleh karenai itu direncanakan untuk digunakan metode dewatering sebagai metode pengairan darurat. Metode dewatering jamak dilakukan pada pekerjaan konstruksi. Namun, karena metode tersebut belum pernah digunakan pada keperluan irigasi, maka perlu untuk dikaji secara mendalam. Dalam kajian ini akan dihitung jumlah sumuran yang diperlukan dan seberapa lama untuk memenuhi debit yang dibutuhkan dalam sehari. Hasil dari kajian tersebut adalah metode dewatering tidak sesuai untuk kegunaan darurat pengairan saluran irigasi karena jumlah sumuran yang diperlukan mencapai ribuan, sehingga perlu dilakukan kajian metode lain untuk memenuhi debit saluran sekunder tersebut. Kata kunci: Dewatering, Irigasi, Saluran Sekunder, Rehabilitasi, Pertanian   Abstract As citizens in an agricultural country, most Indonesians depend on the agricultural sector for their livelihood. Irrigation is crucial to ensure farming yields while developing the agricultural sector. For this reason, the Gumbasa Irrigation Area, Palu, Central Sulawesi, is rehabilitating the primary channel. However, during the rehabilitation process, the secondary channels still need irrigation water flow so as not to interfere with the agriculture it flows through. Therefore, it was planned to use the dewatering method as an emergency irrigation method. The dewatering method is commonly used in construction works. However, since the method has never been used for irrigation purposes, it needs to be studied. The study will calculate the number of wells required and how long it takes to fulfil the required discharge in a day. The result of the study is that the dewatering method is not suitable for irrigation purposes because the number of pits required is in the thousands, so it is necessary to study other methods to fulfil the secondary channel discharge. Keywords: Dewatering, Irrigation, Secondary Channel, Rehabilitation, Agriculture
Analisis Penyebab Kelongsoran Lereng JLS LOT 3 Menggunakan Metode Elemen Hingga Sofi Suhaimah; Yerry Kahaditu Firmansyah; Himatul Farichah
MEDIA KONSTRUKSI Vol. 10 No. 2 (2025)
Publisher : Jurusan Teknik Sipil, Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33772/jmk.v10i2.129

Abstract

Pembangunan Jalur Lintas Selatan (JLS) Lot 3 Pantai Serang - Sumbersih, Blitar, Jawa Timur, terjadi pekerjaan galian yang membentuk sebuah lereng pada STA 1+050 - 1+150. Pada bulan Desember 2024 terjadi hujan yang cukup lebat memicu terjadinya longsor pada sisi kanan lereng. Kondisi geoteknik pada lereng berupa batu kapur sedikit kelanauan dengan nilai N-SPT 60, hal ini tidak sesuai dengan di lapangan yang terjadi longsor. Dilakukan analisis penyebab kelongsoran dengan menaikan tinggi muka air tanah setengah tinggi lereng dan setinggi lereng dengan faktor aman 2,22 dan 1,89 lebih besar dari 1,5. Dilakukan analisis  asumsi retakan dengan menurunkan nilai kohesi (c) menjadi 0-10. Didapatkan faktor aman dengan retakan yaitu 1,022 yang kurang dari 1,5 yang berarti lereng tidak stabil dan terjadi longsor. Dilakukan analisis stabilitas lereng dengan asumsi retakan dan menaikan muka air tanah setengah tinggi lereng dan setinggi lereng dengan faktor aman 1 dan 0,979. Faktor keamanan ini lebih mencerminkan kondisi longsor nyata di lapangan.
Co-Authors Abidin, Farhan Zainul Achmad Firman Maulana Al Firdaus Nawawi Alfin Reza Saputra Alfin Arifah Ismi Ambiya Arraya Fredericko Romanza Aryaseta, Bagas Avenzoar, Azkia Damayanti, Apta Kania Dana, Dinan Dian Purnamawati Solin Dominikus Aditya Fitriyanto Dwi Septy Wahyuningdiah Evandra Sebastian Farah Salsabila Rahma Himatul Farichah Himatul Farichah Ifthar Ramadhana Wahyudi Irmawan, Mudji Jatmiko, Muhammad Fauzi Kohar Yudoprasetyo Kresnawati, Megahnanda Alidyan Kusuma Indrasurya Kusuma, Ade Laily Endah Fatmawati M. Yusril Inza Mahendra Marco Dian Qinanta Miguel Felix Wijaya Miguel Felix Wijaya Minarni Nur Trilita Muhammad Ainun Nashrul Majid Muhammad Salman Mukhtar Nia Dwi Puspitasari Prasetyo, Querida Addisty Prayudi Prayudi Raden Kokoh Haryo Putro Ramadhan, Arya Galih Rania Nurlita Sari Refani, Afif Navir Siti Fauziah Sofi Suhaimah Yufika, Alivia Wulan