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All Journal Dimas: Jurnal Pemikiran Agama untuk Pemberdayaan Jurnal Teknik Sipil Jurnal Rekayasa Sipil Journal of Advanced Civil and Environmental Engineering Jurnal Pemberdayaan Masyarakat Madani (JPMM) JOURNAL OF CIVIL ENGINEERING, BUILDING AND TRANSPORTATION Jurnal Pengembangan Rekayasa dan Teknologi Astonjadro Teknika Dulang: Jurnal Pengabdian Kepada Masyarakat Journal of Civil Engineering and Technology Sciences Jurnal Teknik Sipil Jurnal Pengabdian KOLABORATIF JMT (Jurnal Matematika dan Terapan) KOPEMAS
Masvika, Hendra
Universitas Semarang
Arts Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation Other

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Evaluation of the Sragi Secondary Channel of the Kaliwadas Irrigation Area, Pekalongan Regency Wanto, Sri; Masvika, Hendra; Cahyono, Dhamang Budi; Purwanti, Hani
JACEE (Journal of Advanced Civil and Environmental Engineering) Vol 7, No 1 (2024): April
Publisher : Universitas Islam Sultan Agung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30659/jacee.7.1.8-17

Abstract

The Sragi secondary channel is located in the Kaliwadas irrigation area, Pekalongan Regency has a length of 7,587 m. The position of the channel is in a rice field area which is used to optimize irrigation to support agricultural business productivity. The existing condition of the channel in the form of native soil causes frequent leaks. Technical handling is needed to repair irrigation buildings in the form of a study on the existing condition of the Sragi secondary channel through field surveys and checking physical conditions. Furthermore, identification of the level of damage to irrigation channels is carried out. From the problems that arise at the identification stage, recommendations are then given in the form of proposals for improvements to buildings and irrigation channels. The results of the field survey in the form of network tracing provide data that the level of physical and functional damage to the Sragi secondary channel infrastructure reaches >40%. The condition is categorized as very bad with the classification of severely damaged which requires repair or replacement. Most of the damage in the form of spots or localized occurred on the existing lining of masonry and precast concrete starting from Hm 50+00 to Hm75+68. The recommendations for improvement are in the form of dismantling the existing precast concrete lining according to the point of damage. It is recommended to repair the lining using K-300 precast concrete so that the structure of the irrigation channel is safe against the risk of deformation.
Analisis Stabilitas Lereng Dengan Dinding Penahan Tanah Menggunakan Perhitungan Manual Dan ASDIP Retain v.4.7.6 Alfana, Siril; Assafira, RA Rieke Aulia; Situmorang, Adolf; Masvika, Hendra
Teknika Vol. 19 No. 1 (2024): Maret
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/teknika.v19i1.7855

Abstract

Penelitian ini membahas mengenai analisis stabilitas lereng pada Jalan Tol Trans Sumatera Ruas Sigli-Banda Aceh Seksi 1 pada STA 21+725. Perkuatan lereng menggunakan dinding penahan tanah tipe kantilever setinggi 5,1 m dan kelandaian lereng 45°, dengan angka aman >1,5. Perhitungan dilakukan pada kondisi statis dan kondis gempa menggunakan GeoStudio 2012, ASDIP Retain v.4.7.6, dan perhitungan manual. Hasil perhitungan menggunakan GeoStudio 2012 diperoleh angka aman 3,057 untuk kondisi statis dan 1,787 untuk kondisi gempa. Hasil perhitungan menggunakan ASDIP Retain v.4.7.6 diperoleh SF guling 3,02 dan SF geser 5,81. Gaya geser pada ketinggian kritis sebesar 95,3 kN/m dan tahanan geser sebesar 328 kN/m. Hasil perhitungan manual kondisi statis terhadap gaya eksternal diperoleh SF guling 3,034, SF geser 1,921, dan SF daya dukung 14,19. Nilai SF untuk kondisi gempa diperoleh SF guling 2,077, SF geser 1,775, dan SF daya dukung 9,631. Terhadap gaya internal kondisi statis dan kondisi gempa telah memenuhi syarat angka keamanan. Hasil simulasi dengan GeoStudio 2012, ASDIP Retain v.4.7.6, dan perhitungan manual di atas telah sesuai dengan syarat faktor keamanan sesuai SNI 8460:2017.
Perbaikan Tanah Ekspansif Dengan Penambahan Pasir Kasar Sebagai Stabilisator Faizal Mahmud; Hendra Masvika; Kukuh Wisnuaji Widiatmoko; Fahrudin Ahmad
Jurnal Teknik Sipil Vol. 17 No. 1 (2024): Juni 2024
Publisher : Faculty Of Engineering University 17 August 1945 Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56444/jts.v17i1.1394

Abstract

Stabilisasi tanah merupakan suatu langkah untuk meningkatkan sifat-sifat dan kekuatan pada tanah. Salah satu metode untuk meningkatkan daya dukung tanah adalah dengan menambah atau mencampur dengan material yang memiliki nilai daya dukung yang tinggi. Penelitian akan difokuskan pada daya dukung tanah dengan menambah atau mencampur pasir kasar menggunakan pengujian Atterberg Limits dan Proctor yang diharapkan dapat meningkatkan daya dukung tanah terhadap kepadatannya. Penelitian dilakukan di Laboratorium Mekanika Tanah Fakultas Teknik Univesitas Semarang dengan cara membuat sampel dari hasil pemadatan standar, kemudian sampel diberikan penambahan pasir kasar dengan persentase penambahan sebesar 0%, 10%, 30%, dan 50% untuk mendapatkan nilai Atterberg Limits dan Proctor maksimum setelah dilakukan penambahan pasir kasar. Pada masing-masing pengujian didapatkan hasil bahwa pada tanah tersebut mengalami peningkatan daya dukung setelah dilakukan stabilisasi, sehingga dapat disimpulkan bahwa pasir kasardapat digunakan untuk bahan stabilisasi. Pada masing-masing pengujian didapatkan hasil bahwa proses stabilisasi tanah optimum berada pada campuran 50%, hal ini terjadi karena sifat dari pasir kasar yang befungsi sebagai bahan pengisi tetapi tidak memiliki sifat mengikat, sehingga ketika volume pasir kasar telah memenuhi rongga-rongga tanah dan memiliki sisa, maka sisa pasir kasar tersebut akan menumpuk dan memadat bersama tanah sehingga lebih menstabilkan ikatan tanah yang telah terbentuk.
Mathematical Modelling Demineralisasi Fe pada Profil Baja IWF dalam Kondisi pH Asam dan Basa Lila Anggraini; Hendra Masvika; Sriwanto; Sudanti; Muhammad Latif
Jurnal Teknik Sipil Vol. 18 No. 2 (2025): Desember 2025
Publisher : Faculty Of Engineering University 17 August 1945 Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56444/2xnyf630

Abstract

Profil baja IWF (Instrument Wide Flange) merupakan elemen struktur yang banyak digunakan pada bangunan industri karena kemudahan dalam pemasangan dan fleksibilitasnya. Namun, kondisi lingkungan ekstrem seperti genangan air dengan pH asam maupun basa dapat mempercepat proses demineralisasi (korosi) pada baja. Penelitian ini bertujuan untuk mengidentifikasi laju kehilangan unsur Fe dari profil baja IWF akibat perendaman dalam larutan dengan pH ekstrem, serta menyusun model matematis yang menggambarkan proses demineralisasi. Metode yang digunakan adalah uji laboratorium dengan perendaman potongan baja dalam larutan pH 4, 7, dan 10 selama 72 jam, dilanjutkan dengan uji TDS, ORP, dan morfologi. Hasil menunjukkan bahwa pada pH 4, terjadi demineralisasi Fe tertinggi sebesar 16,167 mg dengan rata-rata ORP sebesar 195,5 mV dan TDS 732,55 ppm. Berdasarkan data tersebut, dibentuk model matematis diferensial untuk memprediksi laju demineralisasi. Disarankan penggunaan pelapis (coating) yang sesuai untuk meningkatkan umur pakai struktur baja.
Peningkatan Kapasitas Siswa SMA Institut Indonesia tentang Penulisan Ilmiah Bertemakan Green Building Purwanti, Hani; Firmawan, Ferry; Masvika, Hendra; Purwanto
Jurnal Pengabdian KOLABORATIF Vol. 4 No. 1 (2026): January
Publisher : Faculty of Engineering, Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/kolaboratif.v4i1.12727

Abstract

The increasing human activities and climate change have significantly contributed to global warming, which threatens environmental sustainability. The construction sector is one of the major contributors to environmental degradation and climate change due to its high carbon emissions. As a solution, the implementation of the green building concept has been developed. This concept emphasizes the use of renewable energy and the application of zero-energy-use principles. This condition creates opportunities for students of SMA Institut Indonesia Semarang to produce scientific articles and academic writings related to green building. This activity aims to improve students’ abilities in writing scientific articles on green building themes that align with environmental and sustainability issues. The methods applied include lectures, discussions, and simulations. The pre-test and post-test results indicate an increase in participants’ understanding from 43.75% to 81.25% regarding green building concepts and scientific writing. This improvement serves as an indicator of the program’s success. The activity received positive responses and full support from the school, and it had a beneficial impact on enhancing students’ fundamental understanding of scientific writing, particularly in the green building topics that are highly relevant to current environmental issues.
Infiltration Wells as a Solution to Runoff and Flooding Problems in Purwodinatan Subdistrict Semarang City Masvika, Hendra; Haikal, Bintang Husni; Purwanto, Purwanto; Firmawan, Ferry; Khasanah, Nur
Jurnal Pengabdian KOLABORATIF Vol. 4 No. 1 (2026): January
Publisher : Faculty of Engineering, Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/kolaboratif.v4i1.13017

Abstract

During the rainy season or under heavy rainfall events, roads in Purwodinatan Subdistrict, Semarang City, frequently experience water ponding. This condition disrupts community activities and other road users. Insufficient drainage capacity to accommodate rainfall volume, along with inadequate drainage maintenance that leads to sedimentation, contributes to surface runoff and water inundation. These conditions require further mitigation measures to control surface runoff and shorten the drainage recession time. Therefore, the planning of infiltration wells is proposed as an alternative solution to address this problem. The implementation method adopted in this study consists of a literature review related to the design dimensions of infiltration wells, followed by the calculation of the Bill of Quantities (BoQ). The planning conducted represents a preliminary approach and is solely based on a literature review of infiltration well design, without involving detailed technical analyses of infiltration well capacity. Based on the BoQ calculation, a cost of IDR 6,462,954.92 is required to construct one infiltration well along the Bubakan Baru Street segment, where 9 infiltrations well locations are identified within a single road segment. The final outputs of this activity include a map of proposed infiltration well locations and the BoQ calculation to be submitted to the subdistrict authority. This activity serves as a preliminary planning stage to assist the community in estimating the dimensions, number of locations, and cost of infiltration wells.
Co-Authors Abda Abda Adolf Situmorang Adolf Situmorang Agus Darmawan Adi Alfana, Siril Andie Julian Arfa Andie Julian Arfa Angga Setiawan Pamungkas Angga Setiawan Pamungkas Annisa Zahrotun Na'imah Assafira, RA Rieke Aulia Baehaqi Bagus Acung Billahi Cahyono, Dhamang Budi Chatarina Umbul Wahyuni Dhamang Budi Cahyono Diah Rahmawati Diah Rahmawati Diah Setiati Budiningrum Edy Susilo Eka Bogi Anisa Eka Bogi Anisa Fahrudin Ahmad Faizal Mahmud Faris, Fikri Ferry Firmawan Haikal, Bintang Husni Hari Setijo Pudjihardjo Izzatul Yazidah, Izzatul Kukuh Wisnuaji Widiatmoko Kusrin Kusrin Kusrin Kusrin, Kusrin Lila Anggraini Marshanda Alifia Warda Misbakhus Siddiq Mohammad Haidar Ibnu Mas'ud Muhammad Latif Muhammad Latif Nur Khasanah Nurhidayati Nurhidayati Pamungkas, Wardana Galih Pudjihardjo, Hari Setijo Pudjihardjo, Hari Setijo Purnijanto, Bambang Purnijanto, Bambang Purwanti, Hani Purwanto Purwanto Purwanto Siddiq, Misbakhus Sri Wanto Sriwanto Sudanti Sutarno Sutarno Syamsiar, Syamsiar Trias Widorini