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Jurnal Spektran

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Published by Universitas Udayana

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Core Subject : Engineering,

Civil Engineering, Building, Construction & Architecture

Jurnal Spektran merupakan berkala ilmah online yang dikelola oleh Program Magister Teknik Sipil, Program Pascasarjana Universitas Udayana. Terbit pertama kali pada bulan Januari 2013 dan selanjutnya diterbitkan 2 kali setahun setiap bulan Januari dan Juli. Jurnal Spektran mempublikasikan hasil penelitian dan kajian dari mahasiswa, akademisi, praktisi dan pengamat masalah ketekniksipilan.

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Articles 252 Documents

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ANALISIS RISIKO KETERLAMBATAN PELAKSANAAN PROYEK KONSTRUKSI HOTEL DI BALI I Made Alit Karyawan Salain; G. A. P. Candra Dharmayanti; Gde Ngurah Anindita
JURNAL SPEKTRAN Vol 7 No 2 (2019): Vol. 7 No. 2, JULI 2019
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

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RISK ANALYSIS OF THE CONSTRUCTION PROJECT DELAY OF HOTEL IN BALIABSTRACTHotel construction projects generally have a high level of complexity compared to other building construction projects, because of the many jobs that must be integrated with each other and have a tight work schedule. All of that has the potential to cause delays in the implementation of construction projects for hotel projects in Bali. This study aims to analyze the risk of delays in implementing hotel construction projects in Bali.This study uses a qualitative descriptive method with primary data sources taken through surveys using a questionnaire. Respondents were taken based on purposive sampling method which was selected based on criteria that respondents played an important role in hotel construction projects in Bali, as many as 35 respondents, which included one director, one project manager; one site manager, two supervisors; two quality control. The results showed that there were 44 risks of delays in hotel construction projects in Bali consisting of 37 major risks and 7 minor risks. Major risks included 22 undesirable risks with 36 mitigation actions, and 15 unacceptable risks (unacceptable risks) with 24 mitigation measures. Risk related to project was indicated as frequently found the source of risk. Project risk at unacceptable risk is the determination of a very tight schedule, a work plan that is not well structured and changeable, understanding the rules of work drawings, resource mobilization, unavailability of materials as needed. Risk related to project that categorized as undesirable covered: limited authority of personnel/owners in decision making, inspection methods and job control by the owner, failure of the owner to coordinate work with the contractor, inadequate provision of tools/materials by the owner, inadequate number of workers, and inadequate work equipment. Mitigation measures are emphasized on project risk and technical risk including the preparation of detailed and comprehensive planning and scheduling, attention to work documents and contracts, as well as improving coordination between relevant parties and also optimizing the accuracy of plans in carrying out the work

ANALISIS DAMPAK PELAKSANAAN CAR FREE DAY DI KOTA DENPASAR Studi kasus: Jalan Raya Puputan Niti Mandala Renon Ni Putu Decy Arwini; I N. Widana Negara; I P. Alit Suthanaya
JURNAL SPEKTRAN Vol. 3, No. 1, Januari 2015
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

Abstract: Renon area is the center of the goverment system of Bali province. As one of the main street in Denpasar city, this street can represent the characteristics of Denpasar city which is the Car Free Day was held in in every Sunday morning in this street, as a simple way to reduce the air pollution and noise. The calculation in this journal is road performance, air pollution and noise level for 2 condition that is in Car Free Day and in working day. From the calculation result of road performance, the capacity of the street is 4.110 pcu/hour with degree of saturation is 0,8. The level of street service is on D category where the flow is almost unstable with high volume of traffic. The traffic volume is mostly reached the capacity and delay is frequently occur in this street. The measurement process of the level of air pollution showed that from six parameter which tested were over all are still under the standard quality which is allowed as good and medium category. The Sulfur dioksida (SO2) which was measured in busy day showed the improvement about 6,78% from the measurement which is done in Car Free Day. The nitrogen dioksida showed the improvement for about 36,35% , the carbon monoksida also showed the improvement for about 366,25%, the total dust had the greatest improvement for about 599,95% or six time greater rather than the level of total dust in Car Free Day. In the other hand, oxidantshowed the improvement for about 28,75%.The noises which occured in Car Free Day showed the average level of dB(A)is 61,65 whereas in workdays showed 72,77 dB(A). At 07.30 until 07.45 in the morning , the maximum level of noises occurs in Car Free Day and in work day. The noises improvement which occured when the Car Free Day was held with workday is about 19,17%.

PENINGKATAN PERSIMPANGAN BANDARA NGURAH RAI DITINJAU DARI PERSPEKTIF KINERJA PERSIMPANGAN Nyoman Widana Negara
JURNAL SPEKTRAN Vol 6 No 2 (2018): Vol. 6, No. 2, Juli 2018
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

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ABSTRAK Persimpangan Bandara Ngurah Rai memainkan peranan penting untuk pelayanan transportasi, akses Bandara Ngurah Rai dan aktivitas budaya lokal. Kemacetan yang terjadi pada persimpangan ini sebagai dasar Kementerian PUPR, melalui BPJN-8 melaksanakan peningkatan kapasitas persimpangan dengan simpang susun dengan bundaran (roundabut interchange), akan tetapi penerapan konsep ini masih ada pro-kontra dari sisi budaya lokal Bali. Data lalu lintas dan gambar rencana persimpangan, dan jumlah penduduk diperoleh dari instansi terkait. Peramalan dan analisis pergerakan arus lalu lintas (MAT) menggunakan trip distribution Detroit model. Rancangan penelitian adalah analisis perbandingan (comparative analyisis) dengan 2 Skenario yaitu Skenario-1 (do nothing) dan Skenario-2 (roundabout interchange). Hasil analisis kinerja persimpangan diperoleh bahwa Skenario-2 lebih baik dibandingkan Skenario-1, dengan indikasi Skenario-2 mencapai DS>0,75 (macet) pada tahun 2028 dibandingkan dengan Skenario-1 terjadi DS>0,75 (macet) pada Tahun 2018, hal ini disebabkan karena kapasitas pada Skenario-2 lebih besar 63% dibandingkan Skenario-1 dan akibat adanya pengalihan arus lalu lintas melewati underpass sebesar 51.57%. Hasil observasi lapangan dan gambar rencana menunjukan bahwa simpang susun dengan bundaran telahmempertimbangkan aktivitas budaya lokal dengan menyediakan jalur dan ruote alternatif agar aktivitas Agama dan Budaya dengan tidak lewat underpass (mesulub).

EVALUASI RENCANA KINERJA KOLAM RETENSI (RETARDING BASIN) DALAM UPAYA PENGENDALIAN BANJIR TUKAD MATI DI KOTA DENPASAR I G. Suryadinata P; I N. Norken; I G. B. Sila Dharma
JURNAL SPEKTRAN Vol 1, No 1, Januari 2013
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

Tukad Mati is one of the rivers in the province of Bali that unfolds and flows in Badung regency and Denpasar. Inundation due to flooding is a problem that often occurs in this region during the rainy season. In an effort to overcome problems of flooding have been many studies carried out so as to produce flood control alternatives such as normalization, diversion channels and retarding basins. Retarding basin is one of flood control alternative that has not been much studied. In this study conducted a simulation of flood prevention alternative with retarding basin at Tukad Mati, by the hydrology approach method and hydraulics using HEC-RAS 4.0 program applications. Simulations performed on the current river flow conditions (existing condition) and to the existing conditions with the retarding basin, according to the detail design of retarding basin in the city of Denpasar and evaluate the effectiveness of the retarding basin in the river basin flood control of Tukad Mati. Flood control by retarding basin based on simulations with the 2 (two) years flood return period, resulting in a reduction of water level by an average of 0.42 meters or an average of 12% of the maximum water level in the conditions without retarding basin, which occurred in along the grooves on the lower reaches of the retarding basin and inundation waters still occur in some places, particularly in the downstream of Umadui Dam. Economic analysis of both the analysis of Benefits/Cost produces a parameter of BCR, NPV and IRR are not meet the feasibility requirements. The effective retention of retarding basin based on simulation results are 282,630.00 m3 with the ability to flood accommodate for 3-4 hours. In terms of economic development retarding basin is not feasible in terms of comparative costs and benefits

PERSPEKTIF PEMILIK PROYEK TERHADAP PERMASALAHAN DALAM MANAJEMEN KLAIM KONSTRUKSI Susy Fatena Rostiyanti; Seng Hansen
JURNAL SPEKTRAN Vol 5 No 2 (2017): Vol. 5, No. 2, Juli 2017
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

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The uncertainty and complexity of construction projects often result in conflicts and unavoidable claims. Commonly, claims are submitted by the contractor for additional payment or time extensions triggered by the additional works beyond general terms and contract conditions. Unsuitable claims may lead to disputes so there is a need for claims management to avoid potential disputes. Claims can not be avoided in any construction project, but a properly executed management approach is expected to reduce the impact of claim that leads to disputes. Evaluation to problems in the six stages of claims management was conducted through questionnaires distribution to project owner and analyzing using significance index approach. The problems that often arise in each phase are elaborated in a form of Likert question. The results of field data collection are processed to obtain the most significant problems arisen in each claim management phase. The results indicate that from the six phases of claims management, the problems that often arise are related to four aspects, namely the availability of standard in claims management, the availability of competent human resources handling claims, the limitation of communication ability, and the limited ability to document the implementation of the project. Keywords:claims management, owner, contruction project, significance index

STUDI KELAYAKAN EKONOMI PEMBANGUNAN UNDERPASS PADA SIMPANG JL. GATOT SUBROTO-JL. AHMAD YANI DI KOTA DENPASAR Lina Sarasdevi Santosa; P. Alit Suthanaya; I B. Rai Adnyana
JURNAL SPEKTRAN Vol 4 No 1 (2016): Vol. 4, No. 1, Januari 2016
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

Abstract : Based on data from the Central Statistics Agency (BPS) of Bali in 2013, the population density in the Metropolitan area SARBAGITA (Denpasar-Badung-Gianyar-Tabanan) was 1.057 inhabitants/km2 with an area of 1.753,63 km2 and population was 1.853.017 inhabitants. Availability of facilities and adequate transportation infrastructure is needed, but in fact the performance of roads in the city center has declined. It is characterized by an increase in travel delay problem. Traffic delay problems in the City of Denpasar commonly occur on the stretch of Gatot Subroto street. To minimize the existing problems, Denpasar City Government plans to develop an underpass at the intersection of Gatot Subroto street and Ahmad Yani street. The aim of this study was to analyze the direct benefits of underpass for road users, to analyze the costs necessary to realize and operate the underpass, and to analyze the economic feasibility of the underpass development investment. Based on primary data and secondary data were obtained from government agencies, the method of analysis in this study used the technique of Net Present Value (NPV), Benefit Cost Ratio (BCR) and Internal Rate of Return (IRR). Economic analysis conducted in this study used three criteria (NPV, BCR and IRR) with three interest rates (12%, 15% and 18% per year) stating that the construction of an underpass was economically feasible. For example in the second scenario where the interest rate 15% gain on the analysis of value NPV, BCR and IRR respectively is Rp. 233.462.340.102,00; 1,948 and 30,81%. Suggestions can be submitted from this research is the need to contemplate the effect of changes in land use in areas close to the area around the underpass and needed further study that takes into account the needs of additional traffic lanes.

ANALISIS ABILITY TO PAY AND WILLINGNESS TO PAY JASA KERETA API YOGYAKARTA INTERNATIONAL AIRPORT Imam Basuki; Steven Chuadinata
JURNAL SPEKTRAN Vol 7 No 2 (2019): Vol. 7 No. 2, JULI 2019
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

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The distance of Yogyakarta International Airport airport to Yogyakarta city ranges from 45 km. The train is one of the connectivity options towards the center of Yogyakarta's activities. In determining the transportation rates of people by train, it is necessary to consider the ability and willingness of train service users to pay a sum of money for the services provided. Because the value of Ability To Pay (ATP) and Willingness To Pay (WTP) affects the level of interest of service users. Questionnaire and interview methods were conducted to 130 respondents who were air transport users at Adisutjipto International Airport as a passenger approach at Yogyakarta International Airport. This study aims to determine the value of Ability To Pay (ATP) and Willingness To Pay (WTP) users of Railway services Yogyakarta - Yogyakarta International Airport. The results of the analysis show that the Ability To Pay (ATP) to Adisoetjipto airport is Rp. 3,838.33 per kilometer and is greater than the Willingness To Pay (WTP) for Yogyakarta train services to and from Yogyakarta International Airport Rp. 709 40 per kilometer. Ticket prices are set based on the average price per kilometer of an airport that has a train service amounting to a minimum of Rp 96,644.59.

ANALISIS KEPUASAN KONSUMEN BETON READY MIX TERHADAP KUALITAS PELAYANAN PT. SARANA BETON PERKASA I Wayan Jawat; I N. Sutarja; Mayun Nadiasa
JURNAL SPEKTRAN Vol. 2, No.2, Juli 2014
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

The study about consumers satisfactions toward ready mix concrete company efforts becomes a central topic in construction in Bali. More over, each of ready mix company promotes its comittment consistency in quality and is product services. The aim of these study is to identify the factors which are influenced the services quality towards the consumer satisfaction of ready mix concrete and to know the consumers satisfactions towards services quality. This study used consumers satisfaction survey through sampling technique ( questionnaires distributions to 40 respondent ) by filling or marking the statements provided. To measure the consumers satisfaction toward the service quality, Importance – Perfomance Analysis was used. The aim is to measure the relation between consumer perseption and product/services quality improvement. The result of questionnaires data analyzes, could be concluded that the services quality was very important but the company didn’t do it maximal.The services included : the on time product delivery, the quick services for the consumers, the trust toward the quality, the consumers quality document, the readyness toward the consumers complaint. While, the services quality which were done well by the company, including : the staff took the mixture sample for the presure test, the staff did the slump test, the consumers got the information about the mixture quality, the slump test is based on the quality requirements, the pressure test is based on the the quality requirements, the concrete pump worked well, the mixer truck worked well, the volume of the mixture is based on the order, and the staff prepared and used the testing tool on the field.

SIFAT MEKANIS BETON DENGAN SUBSTITUSI PARSIAL SERBUK BATU BATA PADA SEMENPORTLAND I Made Suparta; I Made Alit Karyawan Salain; Ngakan Made Anom Wiryasa
JURNAL SPEKTRAN Vol 6 No 1 (2018): Vol. 6, No. 1, Januari 2018
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

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Waste bricks powder is pozzolan a material which contain silica and alumina activated that could react with the Portland cement (SPI). Compounds content SiO2 + Al2O3 + Fe2O3 bricks powders from Desa Oebelo of 91%. The pozzolan materials pass quality specifications according to ASTM C618 where the amount of compounds SiO2 + Al2O3 + Fe2O3 at least 70%. This research is to use of waste brick powder as a pozzolan material in concrete mixtures. Research on the mechanical properties of concrete with brick powder (SBB) as a partial substitution on the Portland cement (SPI) has been realized using cylindrical specimens of diameter = 150 mm and height = 300mm. The specimens were made by using a proportion, by weight, of 1.0 binder: 2.0 sand: 3.0 crushed stone and water binder ratio of 0.5. The binder was made by a mixture of SPI and SBB. The percentage of SBB in the binder varied: 0%, 10%, 20% and 30% by total weight of the binder. Thegrain distribution of sand and crushed stone were designed according to SNI 03-2834-2000 to meet respectively the gradation zone 2 for fine aggregate and the granules with a maximum diameter of 20 mm for coarse aggregate. The test of concrete mechanical properties included compressive strength, modulus of elasticity and split tensile strength and realized atthe specimen’s age of 28, 56, and 90 days respectively using three specimens for each test.The test result shows that the positive reaction of brick powderas a pozzolanic material can only be noted after the hydration age of 90 days. The development of compressive strength, modulus of elasticity and split tensile strength depend on the percentage of SBB used in the binder. In fact, the use of 10%SBB in the binder produce compressive strength, modulus of elasticity and split tensile strength respectively about 97%, 94%, and 98% compared to those produced using 100% SPI. This interesting performance could be strongly related to the pozzolanic effect of SBB on the long term of hydration. Keyword:brick powder, compressive strength, modulus of elasticity, split tensile strength

ANALISIS FAKTOR YANG MEMPENGARUHI TENAGA KERJA KONSTRUKSI UNTUK MEMILIKI SKA/SKTK PADA KONTRAKTOR DI KABUPATEN BADUNG I M. Jelantik; I M. Alit K. Salain; Mayun Nadiasa
JURNAL SPEKTRAN vol 2, No 1, Januari 2014
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

The law of construction service (UUJK) No.18 Year 1999 has required that the manpower of construction has to have the Certificate of Expertise (SKA) and Working Skill (SKTK). The purpose is in order that the business of construction service in Indonesia becomes firm, reliable, has high competiveness and produces a high quality construction work. But there is still lot of manpower of construction that has not has it. This research has purpose to find out the factors that influence the manpower of construction on contractor in Badung Regency to have SKA/SKTK. Sample to be researched is the manpower of construction at the contractor of project manager of Badung Regency Government with qualification grade 2, 3, 4, 5 and 6. Data is obtained by spreading out questionnaire and interview. The data analysis and processing is using the factor analysis. Research result is that there are three factors that are identified to have influenced the manpower of construction to have the SKA/SKTK. These three factors are factor I, II and III. These three factors are formed by fifteen variables. The most dominant factor is the factor I. This factor is formed by seven variables those are it still be able to have job without having the SKA/SKTK, the SKA/SKTK is not fully required on the government’s project, the SKA/SKTK is not yet required on non-government’s project, to already have the SKA/SKTK cannot guarantee that the wage/salary will be increased, to already have the SKA/SKTK cannot guarantee the increasing of career level, to already have the SKA/SKTK cannot guarantee the increasing of expertise/work skill.

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