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Simulasi Pengaruh Kemiringan Atap Rumah Terhadap Hujan Pasir Erupsi Gunung Api Tatas Tatas; Amien Widodo; Machsus Machsus; Muhammad Hafiizh Imaaduddiin
Jurnal Aplikasi Teknik Sipil Vol 13, No 2 (2015)
Publisher : Departemen Teknik Infrastruktur Sipil Institut Teknologi Sepuluh Nopember Surabaya

Letusan vulkanologi Gunung Bromo pada Tahun 2011 memberikan dampak kerusakan dan kerugian bagi masyarakat di empat kabupaten sekitarnya, yaitu Kabupaten Probolinggo, Kabupaten Pasuruan, Kabupaten Malang, dan Kabupaten Lumajang. Hujan pasir yang terjadi menyebabkan daerah di sekitar puncak tertutup pasir hingga radius lebih dari lima kilometer. Pasir tersebut menutup atap-atap permukiman serta sarana dan prasarana umum lainnya, seperti sekolah dan jalan. Letusan yang terjadi di musim hujan menyebabkan pasir yang menutup atap rumah menjadi lebih lekat dan berat. Hal tersebut menyebabkan beban berat pada atap permukiman. Karena atap bangunan tidak didesain untuk beban yang lebih besar, maka hal tersebut menyebabkan struktur atap tidak mampu menahan beban pasir sehingga atap permukiman banyak yang runtuh. Penelitian ini dilakukan untuk memberikan solusi bagi rumah-rumah yang berada di sekitar gunung berapi agar apabila terjadi hujan pasir, pasir dapat dengan mudah tergelincir turun sehingga tidak terkumpul di atap rumah. Metode yang digunakan adalah dengan melakukan simulasi hujan pasir pada berbagai jenis atap, genteng tanah dan beton, seng dan asbes. Pasir yang digunakan adalah pasir yang diambil dari hasil letusan Gunung Bromo di Tahun 2011 dengan kondisi pasir kering dan basah. Hasil akhir penelitian yang diperoleh adalah variasi kemiringan atap sehingga hujan pasir yang mungkin terjadi tidak terkumpul di atas atap.

Rencana Kontijensi untuk Tanah Longsor di Desa Kalikuning, Pacitan, Jawa Timur Tatas Tatas; I Putu Artama Wiguna; Machsus Machsus; Tri Dani Widyastuti; Mohammad Arif Rohman
Jurnal Aplikasi Teknik Sipil Vol 13, No 2 (2015)
Publisher : Departemen Teknik Infrastruktur Sipil Institut Teknologi Sepuluh Nopember Surabaya

Rencana kontijensi merupakan bagian dari konsep manajemen resiko bencana sebagai upaya mitigasi yang berupa dokumen sebagai pelengkap rencana penanggulangan kedaruratan bencana. Rencana kontijensi merupakan upaya sistematis yang bertujuan untuk kesiapsiagaan bencana, misalnya bencana tanah longsor. Pada tanggal 2 Januari 2011, longsor terjadi di Desa Kalikuning yang berjarak sekitar 16 kilometer ke arah timur laut Pacitan Kota. Tidak ada korban pada waktu itu kecuali beberapa rumah mengalami kerusakan. Namun, menurut penyelidikan sebelumnya, longsor berpotensi akan terjadi. Jika tanah longsor terjadi, kemungkinan daerah yang terkena adalah di Rukun Tetangga (RT) 1, 2, 3 dalam Rukun Warga (RW) IX yang terletak di dalam "mangkuk" longsor yang potensial terjadi. Untuk menyiapkan segala sesuatu apabila hal tersebut benar terjadi maka perlu dilakukan penyusunan rencana kontijensi. Metode yang digunakan adalah dengan Focus Group Dicussion (FGD). Kegiatan tersebut dilakukan dengan melibatkan beberapa stakeholder, yaitu perwakilan Komunitas di Kalikuning, Lembaga Swadaya Masyarakat (LSM), dan dinas pemerintah setempat yang terkiat dengan kesehatan, informasi, transportasi, konstruksi, sosial, termasuk lembaga militer. Berdasarkan hasil FGD, dokumen rencana kontingensi didirikan melibatkan beberapa langkah, yaitu penilaian bahaya, penentuan insiden bahaya, penentuan skenario, penentuan kebijakan, dan perencanaan alokasi sektoral. Perencanaan alokasi sektoral dibagi dalam manajemen dan koordinasi, evakuasi, logistik, kesehatan, transportasi, komunikasi, dan infrastruktur. Kelima sektor tersebut bergerak atas instruksi Bupati Pacitan atau yang ditunjuk, dengan koordinasi utama ada pada sektor manajemen dan koordinasi. Selain itu, ada beberapa kesenjangan antara kebutuhan dan ketersediaan sumber daya seperti kurangnya kantong mayat, alat evakuasi, dll. Sedangkan kebutuhan yang telah melebihi kebutuhan adalah terkait dengan jumlah tenaga medis.

Pemanfaatan Teknologi Pompa Hydram dan Pemetaan Drone dalam Perencanaan Distribusi Jaringan Air Bersih pada Lokasi Bencana Gempa, Desa Wirotaman Kabupaten Malang Muhammad Hafiizh Imaaduddiin; Mohamad Khoiri; Machsus; Kuntjoro; Yuyun Tajunnisa; Raden Buyung Anugraha Affandhie; Auliagitta Kumala Apsari
Sewagati Vol 6 No 6 (2022)
Publisher : Pusat Publikasi ITS

Desa Wirotaman merupakan salah satu desa terdampak bencana gempa bumi yang terjadi pada April 2021 lalu yang berdampak pada runtuhnya beberapa bangunan dan terganggunya sistem distribusi air bersih pada beberapa lokasi. Padahal, banyak ditemukan sumber mata air di Desa ini yang seharusnya dapat memenuhi kebutuhan warganya. Namun fakta nya, perolehan sumber daya air di desa ini masih belum merata seluruhnya. Beberapa wilayah mengalami kendala air bersih sehingga warganya harus berjalan menuju sumber mata air sambil membawa jerigen-jerigen untuk kemudian dibawa ke rumah masing-masing. Untuk itu, tim abdimas melaksanakan pemasangan pompa hidram pada salah satu sumber mata air di lokasi yang sulit mengakses air bersih untuk memperpendek jarak sehingga air lebih mudah diakses oleh warga. Selain itu, dilakukan pula pengukuran GCP dan pengambilan data citra menggunakan drone. Dari kedua pengukuran ini akan didapat peta orthophoto yang dapat dijadikan acuan dalam perencanaan jalur perpipaan karena memuat data elevasi dan koordinat wilayah.

Analisis faktor penyebab cost overrun dan time overrun yang mempengaruhi kinerja keuangan proyek PLTU Lombok FTP-2 (2x50 MW) dengan pendekatan Partial Least Square Structural Equation Modeling (PLS-SEM) Sunarko Sunarko*; Machsus Machsus; Muhammad Ainul Fahmi
JIM: Jurnal Ilmiah Mahasiswa Pendidikan Sejarah Vol 8, No 3 (2023): Juni, socio-economics, community law, cultural history and social issues
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jimps.v8i3.26099

Power plant projects have an important role in fulfilling the electricity needs of society. However, like other construction projects, power plant projects often experience problems such as cost overrun and time overrun, which can cause financial losses and project delays. Cost overrun is the difference between the actual project cost and the planned cost, while time overrun is the delay in works that exceed the specified contract date, or the date agreed by the parties to the project. This study aims to analyze the factors that influence cost overrun and time overrun in the CFSPP Lombok FTP-2 project (2x50 MW) using Partial Least Squares (PLS) Structural Equation Modeling (SEM). This research was conducted by studying literature related to cost overrun, time overrun, and its causing factors in construction projects. Data was collected through questionnaires and was online distributed to 78 respondents contractor involved in the project. The examination of the inner and outer models is used to analyze the data obtained from research utilizing the Smart PLS 4.0 application. Based on the data analysis, it is revealed that there are nine research hypotheses, with five hypotheses being accepted and four hypotheses being rejected. The factors that contribute to time overrun and cost overrun, according to the accepted hypotheses, include Contractor's Site Management Factors, Design and Documentation Factors, Information and Communication Factors, Project Management and Contract Administration Factors, and Time overrun. Based on these findings, recommendations for management are proposed, which include a contractor project management takeover scheme and the addition of new members to the project consortium

Analisis faktor penyebab cost overrun dan time overrun yang mempengaruhi kinerja keuangan proyek PLTU Lombok FTP-2 (2x50 MW) dengan pendekatan Partial Least Square Structural Equation Modeling (PLS-SEM) Sunarko*, Sunarko; Machsus, Machsus; Fahmi, Muhammad Ainul
JIM: Jurnal Ilmiah Mahasiswa Pendidikan Sejarah Vol 8, No 3 (2023): Juni, socio-economics, community law, cultural history and social issues
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jimps.v8i3.26099

Power plant projects have an important role in fulfilling the electricity needs of society. However, like other construction projects, power plant projects often experience problems such as cost overrun and time overrun, which can cause financial losses and project delays. Cost overrun is the difference between the actual project cost and the planned cost, while time overrun is the delay in works that exceed the specified contract date, or the date agreed by the parties to the project. This study aims to analyze the factors that influence cost overrun and time overrun in the CFSPP Lombok FTP-2 project (2x50 MW) using Partial Least Squares (PLS) Structural Equation Modeling (SEM). This research was conducted by studying literature related to cost overrun, time overrun, and its causing factors in construction projects. Data was collected through questionnaires and was online distributed to 78 respondents contractor involved in the project. The examination of the inner and outer models is used to analyze the data obtained from research utilizing the Smart PLS 4.0 application. Based on the data analysis, it is revealed that there are nine research hypotheses, with five hypotheses being accepted and four hypotheses being rejected. The factors that contribute to time overrun and cost overrun, according to the accepted hypotheses, include Contractor's Site Management Factors, Design and Documentation Factors, Information and Communication Factors, Project Management and Contract Administration Factors, and Time overrun. Based on these findings, recommendations for management are proposed, which include a contractor project management takeover scheme and the addition of new members to the project consortium

Alternative Design of Abutment Damage Management for Glendeng Bridge Tuban Regency Ghazanfar, Alfanditya; Muntaha, Moh.; Machsus, Machsus
INTERNATIONAL JOURNAL ON ADVANCED TECHNOLOGY, ENGINEERING, AND INFORMATION SYSTEM Vol. 4 No. 1 (2025): FEBRUARY
Publisher : Transpublika Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55047/ijateis.v4i1.1592

This study aims to reconstruct the damage to the bridge abutment that occurred in 2020. The bridge abutment was modeled based on its actual conditions, followed by simulations under various scenarios. The research methods included collecting secondary and primary data, as well as computational modeling. Secondary data collected consisted of bridge design drawings, soil data, and river water level data for specific time periods. The next step was to model the bridge structure using Plaxis software. The analysis results indicate that the collapse of the bridge abutment in 2020 was likely caused by floodwater infiltration into the soil, followed by a rapid decrease in floodwater levels. Slope stability analysis using PLAXIS software for the 2020 damage yielded a minimum safety factor (SFmin) of 1.184. After the flood subsided during the operational load stage (LWL), the SFmin indicated "Structural Failure." The failure was attributed to the infiltration process in the soil when the water reached the Low Water Level; flood-saturated soil became unstable as the water receded due to its transition to a saturated state. The 2021 reinforcement resulted in an SFmin of 1.097 during the bridge construction and embankment stages. The embankment load exceeded the capacity of the retaining wall, whose foundation was embedded in soft soil, leading to instability. To address the landslide in the 2021 reinforcement, a Contiguous Pile Wall was utilized, featuring a configuration of bored piles with a diameter of 1 m, a pile length of 30 m, concrete strength (f’c) of 30 MPa, and steel strength (fy) of 400 MPa. A single row of pile caps was included to support the retaining wall along the slip plane, consisting of a row of bored piles embedded as a Contiguous Pile Wall.The analysis results using Plaxis software showed that the safety factor (SF) increased to 1.551, with a total displacement of 0.069 m, which can be categorized as "Safe" according to the Indonesian National Standard (SNI) – 8460 of 2017 on Geotechnical Design.

Manajemen Risiko Proyek Pembangunan Pelabuhan Terminal Kijing Mempawah Pada Masa Pemeliharaan Kontruksi Atoâ€™urrahman, Muhammad; Ahyudanari, Ervina; Rachmawati, Farida; Machsus, Machsus
GEMA EKONOMI Vol 12 No 6 (2023): GEMA EKONOMI
Publisher : Fakultas Ekonomi Universitas Gresik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55129/https://doi.org/10.55129/.v12i4.2927

The Maintenance Period is the period of time for the contractor to maintain the results of the work that has been completed. Construction work during the port maintenance period is often carried out when the port is still operating. This condition provides a greater risk for contractors in carrying out repairs. This study uses a case study on the Kijing Terminal Port Development project, West Kalimantan, which is currently under maintenance. The risk of uncertainty issues that have an impact on project performance is the basis for this research to determine risk factors qualitatively by means of literature studies, distributing questionnaires, validating related parties, then approaching using interviews and FGD (Forum Group Discussion). The results of the FGD were then carried out by analyzing the risk response with several methods to determine the effective level of risk and risk response scenarios were carried out. The results of this study obtained the 4 highest risks, namely, high wave weather conditions and natural disasters, improper waste management, budget discrepancies with maintenance cost allocations, and incompatibility of scope of work during the maintenance period with contract documents. The type of risk response can be carried out with a mitigation plan through proactive and reactive actions in accordance with the financial power you have. Contingency costs of IDR 11,656,043,529.255 or 0.393% of the project value.

Metode Pemeringkatan Bintang untuk Evaluasi Laik Fungsi Jalan Pada Ruas Jalan Batas Kota Sidoarjo – Krian Mawardi, Amalia Firdaus; Syafriansyah, Brian; Basuki, Rachmad; Machsus, Machsus; Prajitno, Achmad Faiz Hadi
Jurnal Ilmiah Ecosystem Vol. 25 No. 1 (2025): Ecosystem Vol. 25 No 1, Januari - April Tahun 2025
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35965/eco.v25i1.4547

Keselamatan jalan adalah suatu kewajiban agar pengguna transportasi aman dan nyaman dalam menggunakannya. Jalan laik fungsi menunjukkan bahwa jalan tersebut aman jika pengguna mematuhi rambu lalu lintas dan aturan yang berlaku. Namun, tidak semua ruas jalan memenuhi kondisi yang ideal, seperti pada Ruas Jalan Batas Kota Sidoarjo – Krian. Evaluasi laik fungsi dilakukan melalui survei secara langsung pada Lokasi penelitian dengan mengisi form. Data survei diolah menggunakan form pemeringkatan bintang untuk menentukan peringkat bintang persegmen jalan. Dari hasil pengolahan, diketahui segmen jalan yang tidak laik fungsi akan diberikan rekomendasi perbaikan agar meningkatkan pemeringkatan bintang. Setelah proses pengambilan data dan dilakukan pengolahan didapatkan hasil pemeringkatan bintang pada tiap segmen jalan, dengan rincian penilaian sebagai berikut: 2 segmen mendapatkan bintang 5, 112 segmen mendapatkan bintang 4, 26 segmen mendapatkan bintang 3, dan 4 segmen mendapatkan bintang 2. Dengan demikian, nilai rata-rata pemeringkatan bintang adalah 4,50, sehingga ruas jalan ini mendapatkan peringkat bintang 4. Rekomendasi perbaikan untuk meningkatkan peringkat bintang antara lain: penambahan rambu lalu lintas, penambahan lampu lalu lintas, perbaikan marka jalan, penambahan rumble strips, dan penambahan ZoSS (Zona Selamat Sekolah). Total biaya perbaikan yang dibutuhkan sebesar Rp. 746.664.839. Road safety is an obligation so that transportation users are safe and comfortable in using it. A road that is functionally feasible indicates that the road is safe if users obey traffic signs and applicable regulations. However, not all road sections meet ideal conditions, such as the Sidoarjo – Krian City Boundary Road Section. Evaluation of functional feasibility is carried out through a direct survey at the research location by filling out a form. Survey data is processed using a star rating form to determine the star rating of each road segment. From the processing results, it is known that road segments that are not functionally feasible will be given recommendations for improvement in order to increase the star rating. After the data collection process and processing, the results of the star rating for each road segment were obtained, with the following assessment details: 2 segments received 5 stars, 112 segments received 4 stars, 26 segments received 3 stars, and 4 segments received 2 stars. Thus, the average star rating value is 4.50, so this road section received a 4-star rating. Recommendations for improvement to increase the star rating include: adding traffic signs, adding traffic lights, improving road markings, adding rumble strips, and adding ZoSS (School Safety Zone). The total repair costs required are Rp. 746,664,839.

Manajemen Risiko Proyek Pembangunan Pelabuhan Terminal Kijing Mempawah Pada Masa Pemeliharaan Kontruksi Atoâ€™urrahman, Muhammad; Ahyudanari, Ervina; Rachmawati, Farida; Machsus, Machsus
GEMA EKONOMI Vol 12 No 6 (2023): GEMA EKONOMI
Publisher : Fakultas Ekonomi Universitas Gresik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55129/https://doi.org/10.55129/.v12i4.2927

The Maintenance Period is the period of time for the contractor to maintain the results of the work that has been completed. Construction work during the port maintenance period is often carried out when the port is still operating. This condition provides a greater risk for contractors in carrying out repairs. This study uses a case study on the Kijing Terminal Port Development project, West Kalimantan, which is currently under maintenance. The risk of uncertainty issues that have an impact on project performance is the basis for this research to determine risk factors qualitatively by means of literature studies, distributing questionnaires, validating related parties, then approaching using interviews and FGD (Forum Group Discussion). The results of the FGD were then carried out by analyzing the risk response with several methods to determine the effective level of risk and risk response scenarios were carried out. The results of this study obtained the 4 highest risks, namely, high wave weather conditions and natural disasters, improper waste management, budget discrepancies with maintenance cost allocations, and incompatibility of scope of work during the maintenance period with contract documents. The type of risk response can be carried out with a mitigation plan through proactive and reactive actions in accordance with the financial power you have. Contingency costs of IDR 11,656,043,529.255 or 0.393% of the project value.

Evaluation of Effectiveness and Benefits of iRAP and Bina Marga Methods for Road Safety Assessment on the Karanglo-Bts. Kota Batu (Karang Ploso) Segment Devayanti, Shafira; Machsus, Machsus; Khoiri, Mohamad
Rekayasa Vol. 22 No. 1 (2024)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/rekayasa.v22i1.18056

According to Road Safety (2002), traffic accidents result from vehicles, humans, road environments, and their interactions. Addressing these issues is crucial for improving road safety, particularly for operational roads and those under maintenance, to prevent recurring accidents in the same locations. This study examines the effectiveness and benefits of two road safety assessment methods: the iRAP ranking analysis method and the Bina Marga ranking analysis method. The Karanglo–Batu City Border (Karang Ploso) road segment, spanning 7.99 km, was selected as the study area. Both methods analyze five key accident types: roadway departure, head-on collisions due to loss of control or overtaking, intersection accidents, and accidents at property access points. Factors influencing these accidents include probability, severity, operational speed, external traffic, and median traversability, with star ratings assigned based on the Star Rating Score (SRS). The iRAP method, utilizing the iRAP Demonstrator application, yielded an SRS score of 8.92 (3 stars), while the Bina Marga method, using manual calculations as per the Road Environment and Safety Guidelines Number 06/P/BM/2024, produced a score of 7.13 (3 stars). After implementing rehabilitation recommendations, both methods improved the score to 2.78 (4 stars). Effectiveness values were 35.68 for iRAP and 31.69 for Bina Marga, both categorized as effective. Post-improvement, the effectiveness value was 12.36, categorized as very effective. The iRAP method demonstrated higher direct benefits, particularly in data input, sampling, and implementation, making it more suitable for precise safety assessments.

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