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INDONESIA
JURNAL ILMIAH MEDIA ENGINEERING
Published by Universitas Sam Ratulangi
ISSN : 20879334     EISSN : -     DOI : -
Core Subject : Education,
Languange, Linguistic, Communication & Media
The Pasca Teknik Sipil (S2) Unsrat Open Journal System (PTSU-OJS) consist of Jurnal Ilmiah Media Engineering (Online Not Yet) and Jurnal Ilmiah Media Engineering (Print) are published fourannualy, in Februari, March, July and November.
Arjuna Subject : -
Articles 218 Documents
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KARAKTERISTIK PEMAMPATAN TANAH RESIDU DI TPA RATAHAN Assa, Vicky A.; Sompie, O. B.A.; Lintong, E
JURNAL ILMIAH MEDIA ENGINEERING Vol 6, No 3 (2016): JURNAL ILMIAH MEDIA ENGINEERING
Publisher : Sam Ratulangi University

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AbstractSoil residues are the result of physical and chemical weathering of the rocks beneath its formation occurred over rocks came from, so there are some specific characteristics of the type of soil residues are not in accordance with the basic concepts of soil mechanics are generally prepared by the behavior of alluvial soil . The ground color is yellowish brown residue . Overview Ratahan case in landfill sites are on sloping native land , therefore the compression on the type of soil residues need more in-depth review of the determination of the parameters of consolidationThe test sample soil residue undisturbed were taken to the Laboratory of Soil Test, Department of Civil Engineering, Polytechnic of Manado for testing the water content, test weight content, test weight type, test Atterberg limits, test seepage and testing consolidation by using the tool oedometer standard. The test results were analyzed further consolidation, so that unknown behavior of soil residue compression. The results of calculations using the tool oedometer consolidation parameters in landfill Ratahan, the voltage value preconsolidation by Casagrande method is 1.20 kg / cm2 sedangan method "Strain Energy-Log Stress" or methods Senol-Saglamer was 1.50 kg / cm2. Compression index value obtained was 0.0915; and the coefficient of volume change in average yield 0.01703 cm2 / kg. Value parameter consolidation coefficient (Cv) for the type of soil residue in a landfill Ratahan can not be known because of the relationship between deformation curve and the root of the time (method Taylor), straight sections do not do not pass at least four points of each curve loading. To graph the relationship void ratio and pressure, if drawn with a logarithmic scale and a linear scale will show a different behavior. Where on the logarithmic scale graph (e log P), produces a curve that is convex making it possible to determine the preconsolidation stress, whereas the linear scale graph preconsolidation stress can not be determined. This is caused because the history of the formation of soil residues, particularly landfill Ratahan not through the deposition process and the process of consolidation as the alluvial soil.The results of the use of methods Casagrande method Senol - Saglamer for preconsolidation voltage values of 12 sites experienced an average difference of about 18.80 % . In the selection method for the determination preconsolidation stress is by using the " Strain Energy -Log Stress " ( Senol - Saglamer method , because this method has a better correlation coefficient , which is 90 % -92 % compared with the methods Casagrande 77 % -82 % ( Senol & Saglamer et.al. , 2000) .Keywords: soil residu, land fill,pre-consolidation, consolidation, Casagrande method, Senol-Saglamer method
OPTIMASI PENANGGULANGAN BENCANA BANJIR DI KOTA MANADO DENGAN METODE AHP (ANALYTICAL HIERARCHY PROCESS) Sudamara, Yoktan; Sompie, Bonny F.; Mandagi, Robert J. M.
JURNAL ILMIAH MEDIA ENGINEERING Vol 2, No 4 (2012): JURNAL ILMIAH MEDIA ENGINEERING
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Masalah banjir cenderung meningkat dari tahun ketahun terutama disebabkan oleh adanya perubahan watak banjir serta pesatnya pembangunan berbagai kegiatan manusia di dataran banjir.Bencana banjir yang terjadi akan memberikan dampak negatif dan buruk bagi suatu daerah dimana masyarakat mengalami kerugian yang besar secara materi. Penelitian ini bertujuan menentukan bobot prioritas dari setiap faktor resiko dalam upaya untuk meminimalkan resiko terjadinya bencana banjir di Kota Manado dengan menggunakan metode AHP (Analytical Hierarchy Process).Penelitian ini dilakukan di Kota Manado Provinsi Sulawesi Utara yang dilaksanakan dari bulan Maret 2012 sampai Juli 2012. Jenis penelitian ini adalah penelitian deskriptif eksploratif, dengan menggunakan metode analisa data kualitatif.Hasil Penelitian menunjukkan bahwa faktor resiko kebiasaan masyarakat memiliki bobot terbesar yaitu 52%, faktor resiko kedua yang perlu diseriusi adalah daerah resapan dengan bobot 17 %, faktor resiko ketiga yang perlu menjadi perhatian adalah pengelolaan DAS dengan bobot 17 % yang sama pentingnya dengan faktor resiko daerah resapan, faktor resiko keempat yaitu aliran permukaan dengan bobot 13 %, dan faktor resiko kelima yaitu pendangkalan sungai dengan bobot 4.Kata kunci : banjir, bobot prioritas, dampak negatif, faktor resiko, metode AHP
Stabilisasi Tanah Ekspansif Dengan Campuran Abu Batu Bara Dan Abu Terbang Batu Karang Dengan Aplikasi Timbunan Tipe Urugan Tanah Sompie, Fergy A. E.; Manoppo, Fabian J.; Sompie, Oktovian B. A.
JURNAL ILMIAH MEDIA ENGINEERING Vol 8, No 2 (2018): JURNAL ILMIAH MEDIA ENGINEERING
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The expansive soil is a soil which clay content has a potential for shrinkage due to changes in water content,causing changes in the volume of soil. The expansive soil is a problematic type of soil in a construction project,especially for the construction of a base ground of a building because it contains montmorillonite minerals withthe largest surface area and is very easy to absorb water. The ground with high shrinkage value, the waterbecomes very influential to the behavior physical and mechanical soils. Therefore, in conducting theconstruction planning, investigation or soil investigation must be conducted in order to know the physical andmechanical properties of the soil if the soil contains clay mineral that is expansive so that we are able to stabilizeto increase the strength and carrying capacity of the soil. Stabilization is done by using fly ash (fly ash) coal androcks.       The objective of this research is to obtain the shear parameter value after mixing coal fly ash and coral aswell as to know the application on landfill type by using 2D plaxis program to know the value of decrease,excess pore water pressure and safety factor. The composition of the mixture used for obtaining shear parametervalues is coal fly ash + ash, soil + rock fly ash and soil + coal fly ash and coral reefs of 2%, 4%, 6%, 8%respectively. For applications on the design of embankment type of soil type taken mixture composition is soil +coal fly ash, soil + fly ash rock and soil + fly ash coal and coral reef 2% and 8% respectively. The sample of thesoil is taken in Warembungan Village, Pineleng District. Investigation of physical and mechanical properties ofthe soil is also carried out such as filter and hydrometer analysis, moisture content, specific gravity, atterbergtest, consolidation test to determine the development (swelling) and CBR Laboratory.       The results showed that the addition of fly ash coal, rock and coal + corals showed the variation of cohesionvalues and shear angle in the increasing percentage of fly ash coal, coal and coral + coal. The original soilcohesion value is 1.72 t / m2 and the inner shear angle is 11.8 °. In mixing between expansive soil + fly ash coalmaximum cohesion value was found at 8% addition which was 1.90 t / m2 while the shear angle value rose to17,93 ° at 6% addition. In mixing of expansive soil + fly ash of rock the maximum cohesion value is in 2%addition which is 1.48 t / m2 while the shear angle value rises to 30,10 °. In mixing of expansive soil + fly ashcoal + coral maximum cohesion value is in 2% addition which is 0,58 t / m2 whereas shear angle value rose to38,80 °. For embankment applications with 0% or no mixture of decreasing values, excess pore water and safetyfactors are 0.312 m, 2.34 kN / m2, and 1.18, respectively. In mixing between expansive soil + fly ash coaldecreased slightly on 8% variation where the value of decrease, excess pore water and safety factor were 0.35 mrespectively; 0.565 kN / m2, and 1.117. In mixing between expansive soil + fly ash rocks, the decreasing value,excess pore water and safety factor increased in 2% variation respectively to 0.188 m; 0.777 kN / m2, and 1,253.In mixing of expansive soil + fly ash coal + coral, decreasing value, excess pore water and safety factorincreased in 2% variation to 0.267 m respectively; 0.657 kN / m2, and 1.245.The addition of fly ash to coralreefs is more effective and efficient than coal in raising the value of soil shear strength parameter but in landfillapplication will be more effective if it is done the addition of both fly ash coal + coral to get smaller decreasevalue and safety factor greater than. It is recommended to first base soil stabilization and use better materialselection for embankment to further increase the safety factor and minimize the decrease value. Keywords: expansive soil, high shrinkage, stabilization, fly ash coal, coral reef ash, safety facto
Kajian Efisiensi Pembangunan Waduk Kuwil Untuk Reduksi Banjir Di Manado Akibat Sungai Tondano Pua, Michael; Sumarauw, Jeffry S. F.; Manoppo, Fabian J.
JURNAL ILMIAH MEDIA ENGINEERING Vol 7, No 3 (2017): JURNAL ILMIAH MEDIA ENGINEERING
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In order to improve the protection of people from water damages disaster, the fulfillment of water sufficiency for most people and farming people, then one way to support the above is to create a multipurpose dam that is Kuwil dam, in addition useful for controlling the ultimate flood-witch This is often the case in Manado and its surroundings. Also, in order to control the flood of Manado City and its surroundings, serious and integrated handling is needed from various related parties. One of the main river that flows Manado City is Tondano river. To control flooding, other than through non-physical effort, physical effort from construction technology is required. The selection of flood control buildings must be carefully calculated, the advantages, disadvantages, benefits and controls. Dam is an irrigation infrastructure that has a very high risk if it fails. Therefore, prior to the construction of dam, there are 3 (three) certifications that must be owned by the prospective owner of the dam. The certification in question is design certification aimed at testing the feasibility of the design details submitted by the consultant team; filling certification that aims to test the physical worthiness of the dam; and operational certification that aims to check the physical viability of the dam over a period of time.Kuwil dam is located across the Tondano river precisely in Kuwil Village, Kalawat Subdistrict, North Minahasa Regency, North Sulawesi Province which is ± 20 km from Manado city, the capital of North Sulawesi Province.The aims of this research are:  To find out the effectiveness of Kuwil dam as a flood reducer in Manado and in order to know the stability of dam  for spillway building due to flood discharge.Method used in this research are data collection. The data is used as a basis for calculation of stability and technical planning. From the rainfall data obtained, hydrological analysis resulted in flood discharge plan, which then processed again to find the amount of flood routing which result is used to determine the elevation of crest spillway. Hydrological analysis for dam planning, covering four things, namely: The inflow that fills the dam, flood plans to determine the capacity and dimensions of spillway buildings,  dam count and  outflow to determine the retrieval building. The calculation of flood debit were proceed  using HEC-HMS Program software.Results revealed that Kuwil’s dam  gives a significant impact for Manado city and its surroundings because it can reduce flood. The efficiency of flood control in Manado and the surrounding could be done by setting the operation pattern of the reservoir. Keywords: water damage disaster, flood , dam, HEC-HMS program, efficiency of flood control
Estimasi Biaya Konstruksi Menggunakan Metode Parameter Pada Proyek Pemeliharaan Berkala Jalan Di Kota Manado Eman, Peter A.; Lintong, Elisabeth M.; Jansen, Freddy
JURNAL ILMIAH MEDIA ENGINEERING Vol 8, No 2 (2018): JURNAL ILMIAH MEDIA ENGINEERING
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Cost estimation plays an important role in the implementation of construction projects. Activityestimation is one of the main processes in a construction project to know the amount of funds that mustbe provided for a building. In general, a construction project costs a lot. The inaccuracies that occur inthe supply will be less good to the parties involved. However, the owner of the project requires costestimation in order to prepare the project budget. In estimating the initial cost of the periodicmaintenance project the road still uses a simple way. The most commonly used method is to estimatethe road length parameters, ie by calculating the periodic maintenance cost of the road for every 1 kmof road length based on the previous project data. So that with the budget available the owner of theproject (owner) can provide long information path that will get regular maintenance activities.      The length of a road segment shows the physical characteristics and size of a periodic roadmaintenance project that in practicality this information can be readily available in the early stages ofproject planning. Along with the need for efficiency, it is necessary to develop techniques for making asimple cost estimation model. What is important in the cost estimation model in the early stages ofproject planning is to be quick, easy to use, accurate and generate reliable estimates.      The aims of this research are to produce the project cost estimation model of periodic roadmaintenance for the relationship between Total Project Cost and LPA volume and ACWC volume, To produce a project cost estimation model of periodic road maintenance for the relationship betweenthe Total Project Cost and the ACWC volume and to produce the project cost estimation model ofperiodic road maintenance for the relationship between Total Project Cost and LPA volume.      The method used are parameter method. Based on the results of the analysis that has been done, itcan be concluded in order to estimate the cost of the periodic maintenance project of roads in Manadacity, in accordance with the research objectives as follows: The project cost estimation model for therelationship between Total Project Cost of Routine Road Maintenance with LPA volume and ACWCvolume is as follows: Total Cost = 2373898,22 LPA + 115476,64 ACWC + 283033186,7 withcorrelation value equal to 94,70% and determination value equal to 89,70%. The project cost estimationmodel for the relationship between the Total Cost of the Road Maintenance Project Period with ACWCvolume ie: Total Cost = 186688,461 ACWC + 699100355,10 with r = 89,90% and r2 = 80,80%. Theproject cost estimation model for the relationship between Total Project Cost of Routine RoadMaintenance with LPA volume ie: Total Cost = 4567920,593 LPA + 30710896,10 with correlationvalue of 87.40% and determination value of 76.40%.Keywords: cost estimation, parameter method, total project cost, road routine maintenance.
Pemodelan Karakteristik Kebutuhan Parkir Pada Perhotelan Di Kota Manado Manabung, Helmut; Rompis, Semuel Y. R.; Timboeleng, James A.
JURNAL ILMIAH MEDIA ENGINEERING Vol 7, No 3 (2017): JURNAL ILMIAH MEDIA ENGINEERING
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The development of tourism industry in Manado City in 2017 along with the growth of supporting facilities in meeting the development of the tourism industry one of the hotel development. As one of the supporting facilities built hotels must have criteria - criteria that can meet the needs of visitors or residents. Parking criteria are important in the transportation system within the hotel area and give effect to the transportation system outside the hotel area. In general, one of the causes of reduced road capacity is parking of vehicles using the road as parking lot of vehicles / on street parking. In order to avoid the occurrence of this congestion is expected that in certain places such as shopping centers, schools / campuses, economic activity centers and others there must be provide with parking place (off street parking) so as to minimize disruption to the capacity of roads. The construction of hotels in the city of Manado had generate   large enough of trip generation from various regions to enter this region. The trip generation or attraction movement that occurs can be such that of the trip generation of people and the trip generation of motor vehicles. The magnitude of these trip generation would causes the need of  the  adequate parking facilities so that the traffic flow which quite busy in the area  of Boulevard and  Jendral Sudirman street will not be disturbed. That is why the knowledge is needed about the characteristics of parking requirements for the existing hotel areas.                The aims of this research were to  provide characteristics of parking needs in some existing hotels in Manado City and to know parameters that affect the parking needs of some hotels in Manado City, so that it can be used as a future approach to resolve the problem of disruption in the capacity of roads.                  Methods used in this study were consist of literature study, primary data collection, secondary data collection and forecasting model using linear regression equation.Results of data analysis revealed that: (1).The regression equation of the car parking requirement with the parameters of the hotels with the best r2 accuracy and qualified statistical testing is the need for car parking which is related to the number of employees and the number of meeting rooms. The standard in the form of regression equation is Y = 1.562 . X0.678 r2=0,841; (2). Based on the analysis with multiple regression the relationship of hotel parameters to the needs of the car park is the number of meeting room, the number of employees and the occupancy rate of the hotel. With the equation as follows: Y = - 56,005 - 4,571 x1 + 0.331 x2 + 1,066 x3, with r2 = 0.999. (3). The number of rooms in the hotel proved to have a large influence on the needs of motor parking at this hotel is indicated by the largest correlation test results among other independent variables, where the relationship between the needs of motor parking with the number of rooms indicated by the equation as follow: Y = - 56,005 - 4,571 x1 + 0.331 x2 + 1,066 x3 ; r2 = 0.993.   Keywords: parking characteristics, disruption, reduced road capacity, trip generation, multiple-regression  
Tinjauan Kinerja Bundaran Tiga Lengan Dengan Simulasi Karakteristik Arus Lalu Lintas Pada Bundaran Patung Tololiu Kota Tomohon Wuwung, Victorie Harly; Waani, Joice E.; Jansen, Freddy
JURNAL ILMIAH MEDIA ENGINEERING Vol 8, No 2 (2018): JURNAL ILMIAH MEDIA ENGINEERING
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Transportation system in a region, act as a vein and also tools to measure the development progress of that particular region, therefore the system growth is usually corelates the growth of other sectors in society, such as economy, social, culture, politics and citizenship, thus the transportation system becomes a deciding factor of a regional growth. A good transportation system is able to ensure the mobility of goods, service and people in an effective, efficient, safe, comfortable integrated andsustainable. One way to achive that is through traffic control, in which the Tololiu Roundabout in Tomohon city as a crossing point that connects Tomohon city and other administrative regions in North Sulawesi, whereas the current roundabout requires data to be able to be adapted with theincreasing regional growth.      The purpose of this research is expected to describe the existing Level of Service (LoS) of the roundabout and predicts the future condition up to 2022 and able to be used as an accountable data for future growth of Tomohon city. The method applied in this research are literature study, primary and secondary data collection, data analysis using MKJI 1997 method and software simulation using AutoCAD 2017, Microsoft Excel2016 and Synchro Studio 9,0.      AutoCAD used to simplify the roundabout geometric analysis, Microsoft Excel used to calculate the MKJI 1997 RWEAV-I and RWEAV-II form and Synchro studio 9,0 used to create a real-time simulation of the traffic characteritics in the field of study.      The result of the MKJI 1997 analysis coupled with the regional demografic data to predict the future condition up to 2022 shows that the Degree of Saturation (DS), exceeded the boundary threshold of 0,75 in the year of 2019 and so is adviced to apply a geometric and/or volume engineered solution. The result of the Synchro Studio 9,0 simulation shows B grade LoS for the existing data of 2015, but exceeded the boundary threshold of DS in US HCM 2010 method in the following year.The different result by the two methods analyses are due to the different parameters incorporated in both method where the US HCM 2010 in Synchro 9,0 is leaning on Delay Control (and more complex parameters) and the MKJI 1997 mothod rely on the Volume and Capacity. Either way, the study and analysis show that the Tololiu Roundabout in Tomohon city is in need of re-engineering in order to adapt to the future regional growth by applying geometric road widening, no-parking zone, volume divertion through the two minors approach available and also a social education of the roundabout rules and regulation coupled with the good-will of the government to provide the neccesarry facility and tools for the roundabout. Keywords: Tololiu Roundabout, Level of Service (LoS), Degree of Saturation (DS), US HCM, MKJI.
ANALISIS PENGARUH TATA GUNA LAHAN TERHADAP KINERJA JALAN DI KOTA GORONTALO Rachman, Ari Putra; Rompis, Semuel Y. R.; Timboeleng, James A.
JURNAL ILMIAH MEDIA ENGINEERING Vol 10, No 1 (2020): JURNAL ILMIAH MEDIA ENGINEERING
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Kota Gorontalo merupakan Ibukota Provinsi Gorontalo yang selain merupakan pusat kegiatan pemerintahan, sosial, politik, pendidikan dan kebudayaan, juga merupakan pusat kegiatan perekonomian daerah Gorontalo. Sebagai pusat perdagangan, industri dan pariwisata, Kota Gorontalo juga memiliki kawasan yang sering mengalami kemacetan. Penelitian ini menganalisa pengaruh tata guna lahan terhadap kinerja jalan. Analisa harus didasarkan pada hambatan samping yang dipengaruhi oleh tata guna lahan. Data hambatan samping tersebut diidentifikasi menjadi hambatan samping tinggi dan hambatan samping rendah yang menjadi dasar hubungan antara kecepatan, volume dan kepadatan. Analisa Greenshield, Greenberg, Underwood dilakukan pada masing-masing lokasi. Lokasi pertama yakni Kawasan Pendidikan yang kapasitas pada ruas jalan Jaksa Agung Soeprapto turun 46% akibat pengaruh hambatan samping di sepanjang segmen jalan. Lokasi kedua yakni kawasan barang dan jasa yang kapasitas pada ruas Jalan H.B. Yassin turun 24% akibat pengaruh hambatan samping di sepanjang segmen jalan, dan Lokasi ketiga yakni kawasan peribadatan yang kapasitas pada ruas jalan A.R Konio turun 39% akibat pengaruh hambatan samping di sepanjang segmen jalan. Berdasarkan hal di atas dapat diketahui bahwa perlu adanya tambahan rambu-rambu lalu lintas pada titik-titik kemacetan sehingga persentase kemacetan akibat hambatan samping akan berkurangnya. Hasil penelitian menunjukkan bahwa di Kota Gorontalo masih banyak terjadi kemacetan akibat hambatan samping yang dipengaruh tata guna lahan, terutama pada kawasan pendidikan, peribadatan, barang dan jasa, sehingga perlu menambah rambu-rambu lalu lintas, pembangunan jembatan penyeberang jalan dan pelebaran Trotoar.  Kata kunci: kapasitas, kemacetan, hambatan samping
ANALISIS KERUNTUHAN GEDUNG BERTINGKAT AKIBAT BEBAN GEMPA DAN BEBAN ANGIN DENGAN METODE PUSHOVER Potalangi, Jessen G.; Manalip, Hieryco; Wallah, Steenie E.
JURNAL ILMIAH MEDIA ENGINEERING Vol 10, No 1 (2020): JURNAL ILMIAH MEDIA ENGINEERING
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Perbedaan perilaku beban gempa dan beban angin merupakan permasalahan yang harus diperhatikan dalam perencanaan gedung bertingkat sehingga analisis dinamis diperlukan dengan mempertimbangkan bentuk dan lokasi struktur. Indikasi keruntuhan elemen dapat terjadi seiring bertambahnya beban lateral. Analisis Pushover merupakan analisis perilaku keruntuhan struktur dimana beban ditingkatkan bertahap sampai melampaui kapasitas maksimum.Pada penelitian ini dilakukan pemodelan struktur gedung 12 lantai (Gedung Fakultas Hukum Unsrat Manado) dengan berdasarkan gambar dan detail struktur dengan Kategori gedung SRPMK. Analisis didasarkan pada data uji tanah lokasi tinjauan (SPT) mengacu pada SNI 1726:2012 dan peta angin wilayah Indonesia yang mengacu pada HB212-2002 Asian-Pasific Region. Metode pushover dioperasikan lewat software ETABS nonlinear version 9.7.4 yang menganalisis beban struktur akibat gempa, angin maupun kombinasi keduanya.Hasil penelitian menunjukkan kapasitas, kinerja, dan keefektifan beban lateral struktur gedung bertingkat. Keseluruhan analisis digambarkan dengan mekanisme pushover berupa kemampuan maksimal struktur sampai keruntuhan, sendi plastis kritis, besar displacement-drift dan respon struktur.Berdasarkan penelitian diperoleh nilai gaya geser dan displacement terbesar yaitu akibat beban gempa (18397,877 KN; 0,584 m), beban angin (2332,929 KN; 0,037 m), dan beban kombinasi gempa-angin (16511,850 KN; 0,587 m). Struktur lebih efektif memikul beban gempa daripada beban kombinasi gempa-angin atau beban angin. Kontribusi Beban angin tidak terlalu signifikan sehingga akibat beban angin termasuk tidak efektif. Secara keseluruhan kinerja struktur pada penelitian ini masih dalam tingkat Immediate occupancy namun baik akibat beban gempa dan kombinasi gempa-angin mempunyai potensi keruntuhan struktur pada lantai 2 dan 3 sementara beban angin tidak.  Kata Kunci:, Pushover, Gempa, Angin, Kombinasi, Kapasitas, Keruntuhan, Kinerja
MODEL ESTIMASI BIAYA KONTINGENSI BERBASIS RISIKO PADA PROYEK NORMALISASI SUNGAI DI DAERAH PERKOTAAN Peginusa, Stefani Switly; Willar, Debby; Manoppo, Fabian J.
JURNAL ILMIAH MEDIA ENGINEERING Vol 10, No 1 (2020): JURNAL ILMIAH MEDIA ENGINEERING
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Pelaksanaan proyek normalisasi sungai di daerah perkotaan khususnya di Sulawesi Utara tidak lepas dari suatu risiko apakah itu risiko berdampak besar maupun kecil terhadap waktu, sumberdaya dan biaya. Untuk mitigasi hal tersebut biasanya para pelaksana proyek selalu mempersiapkan dana kontingensi. Umumnya, penentuan besarnya presentase biaya kontingensi didasarkan pada intuisi dengan melihat pengalaman-pengalaman masa lalu serta catatan historis kontraktor. Penelitian ini bertujuan untuk mengidentifikasi faktor–faktor risiko apa saja yang sering terjadi pada setiap tahapan proyek dan dampaknya terhadap biaya proyek, dan untuk memodelkan perhitungan biaya kontingensi berbasis risiko pada proyek normalisasi sungai yang ada di daerah perkotaan. Identifikasi risiko diperoleh dari survei pendahuluan dan literatur. Bobot risiko dianalisa dengan Analytic Hierarchy Proces. Aspek risiko dianalisa dengan skala pengukuran Pd T-01-2005-B untuk menentukan tingkat risiko dan kategori risiko. Tahap selanjutnya adalah estimasi presentase biaya kontingensi berdasarkan nilai probabilitas rata-rata yang dihasilkan.Hasil Penelitian menunjukkan bahwa ada pengaruh yang signifikan antara frekuensi kejadian terhadap pengaruh/dampak pada biaya kontingensi. Karena itu perlu mendalami tahapan-tahapan dalam proyek konstruksi sehingga jenis-jenis risiko dapat dikumpulkan secara menyeluruh dengan penanganan yang tepat dan pemodelan estimasi biaya kontingensi berbasis risiko pada penelitian ini dapat menjadi acuan dalam menentukan status risiko pada tiap proyek konstruksi yang akan diteliti. Kata Kunci: Biaya Kontingensi, Analisis Risiko, Model Perhitungan, Normalisasi Sungai

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