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MEDIA KOMUNIKASI TEKNIK SIPIL

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Published by Universitas Diponegoro

ISSN : 08541809 EISSN : 25496778 DOI : -

Core Subject : Engineering,

Civil Engineering, Building, Construction & Architecture

Media Komunikasi Teknik Sipil (ISSN 0854-1809) published twice in a year, in July and December. The article can be product of researches, scientific thoughts or case study, in civil engineering and isnâ€™t formed by politics, commercialism, and subjectivity unsure. This scientific journal contains articles of thought and research results in Civil Engineering that have never been published in scientific journals or other media.

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Articles 9 Documents

Search results for , issue "Volume 19, Nomor 1, JULI 2013" : 9 Documents clear

Hasil Bongkaran Perkerasan Jalan sebagai Bahan Lapis Fondasi Jalan Raya Widodo, Sri; Harnaeni, Senja Rum; Hakim, Lukman
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 19, Nomor 1, JULI 2013
Publisher : Department of Civil Engineering, Diponegoro University

Almost 40% of road in Indonesia are damaged. To obtain the maximum result of road improvement, the surface course (asphalt pavement) of the damaged road should be removed. Considering the number of quarries of road pavement materials are limited in the future and the costs are getting more expensive, it is important to do research on recycling asphalt pavement material as road base material. The objective of this research is to examine the use of asphalt pavement removal as road base material. Laboratory test was conducted to investigate the properties of the removal road asphalt pavement and then compared with specification of road base material Bina Marga. The tests include abrasion test, particles size distribution, density and California Bearing Ratio (CBR). Research was initiated by investigating the removalÂ ofÂ asphalt Â pavement maerial, followed by removal of asphalt pavement material + new aggregate, and the addition of 0.5%, 1%, 1.5%, 2% and 2.5% portland cement to the mixture of removal of asphalt pavement material and new aggregate. The result shows that adding 0.5% and 2.5% portland cement to the aggregate mixture can improve the CBR of aggregate mixture by 36% and 94%, which means the mixture of aggregate can be used as sub base and base material of road.

Pengaruh Faktor Pengembangan Sumber Daya Manusia terhadap Komitmen dan Kinerja pada Manajer Proyek Konstruksi Sahadi, Sahadi; Wibowo, M. Agung
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 19, Nomor 1, JULI 2013
Publisher : Department of Civil Engineering, Diponegoro University

This study aims to find out the influence of human resources development factor on the performance of construction managers through their commitment using the structural equation modeling (SEM) approach. The results of study indicate that leadership, organization climate, organization culture, communication climate, trust, work motivation, work experience, reward/salary, and work satisfaction have a positive influence on the commitment and performance of construction project manager and the commitment also has a positive influence on these managers. Among the variables that have dominant influence on the commitment and performance of construction project managers is the reward, in the sequence where work satisfaction and leadership influence the commitment, which in turn influence the reward, andÂ finally, commitment and work experience work in tandem to influence the performance.

Perkiraan Koefisien-koefisien Karakteristik Daerah Aliran Sungai Krengseng untuk Membangun Kurva-Durasi Debit Sachro, Sri Sangkawati; Sugiyanto, Sugiyanto; Budieny, Hary
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 19, Nomor 1, JULI 2013
Publisher : Department of Civil Engineering, Diponegoro University

The flow-duration curve at a site is most useful tool for evaluating flows in water resources development projects. Flow-duration curves are based on cotinuous stream flow data, where stream flow meuserements are not available, precipitation and potensial evapotranspiration records can be used to calculate continuous flows. Calculation of monthly flows from meteorologic data are based on the water balance in watershed. The water balance equation is Precipitation â€“ Actual evapotranspiration + Storage = Runoff. This calculation use coefficients that represent watershed characteristics, that will change from one watershed to another. The watershed characteristic coefficients changes will correlate with changes in vegetation, soils, and subsurface geology. This study is an attempt to estimate the watershed characteristic coefficients to calculate monthly streamflows in Krengseng River at Diponegoro Dam site. TheÂ watershed characteristic coefficients analysis using F.J.Mock Model and NRECA Model. Resuls of watershed characteristic coefficientsÂ analysis using F.J.Mock are, Expose surface, m = 50%, Soil moisture capacity, SMC = 200 mm, Infiltration factor, IF = 0.45, Recesion coeffisien, RC =0.70. Watershed characteristic coefficients using Model NRECA are, Index soil moisture capacity, Nominal:100+(0.25xmean annual precipitation), Base flow parameter, PSUB = 0.30 and Index groundwater storage, GWF=0.50.

Kajian Teknologi Sand by Passing Penanggulangan Sedimentasi dan Erosi Pantai Bengkulu (Pelabuhan Pulau Baai) Hamdani, Hamdani
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 19, Nomor 1, JULI 2013
Publisher : Department of Civil Engineering, Diponegoro University

Curently the port flow conditions Baai Island can no longer be passed if the large size of the ships that will stop at the port. This is because the rut depth at this point is just -2m until -4m LWS, from a normal condition that should be -10m until -12m LWS.This situation is certainly very disturbing process of exit and entry of goods and service to the province of Bengkulu throught this port, and negatively impact the local economy.The aim of this thinking is to provide input for the achievement of an optimal solution to overcome sedimentation arround Baai island port Bengkulu to know the behaviourof the sedimentation ponds arround the harbour entrance and the effect on navigation channel.The scope of research is supporting data collection relating to the port Baai Island Bengkulu including development planning reports, Baai harbour and reports on the sedimentation and the condition of the harbour. The method of analysis used in this study were laboratory analysis techniques. Analysis of what has been Â studied to mentionthat the large amount of sedimen transport (litoral transport) along the coast of the port based on wave direction,among others from the west and south-west and north, are as follows: 1) total sediment transport (Qs) which took place on the beach ports Baai island is: 601,576.20m3/year. 2)The sediment transport that provides the greatest contribution to the sedimentation flow Baai harbour island is the result of calculation is from the west (toward the most dominant),namely: Qs-net = 573,916.72 m3/year.

Peran Kontraktor dalam Peningkatan Constructability pada Pembangunan Jalan Jembatan Wilayah Kalimantan Timur Sulistio, Hendrik; Magawaty, Magawaty
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 19, Nomor 1, JULI 2013
Publisher : Department of Civil Engineering, Diponegoro University

Contructability has been defined as the optimus usefull of construction knowledgeand experience in planning design, procurement and field operation to achieve overall can be effective, efficiency efficiency and good quality (CII, Uaustin, USA). Successful application from constructability improvement suspended commited from overall group Project Management Team for achievent of project goals. Project Management Team is referred between the project owner, architect or designer and the construction company before construction commences. Purpuse of observing is understanding set construction company manager in practice concept constructability in goal construction project for achieve improvement of performance and optimum project can be efficiency can be saved. Object observe focust in build of road and bridge in East Borneo with sample are construction company manager with questionare after that with Analysis Static Parametric. Result of Improtance Analysis is 6.32 and result of performance analysis is enough high but has separated from importance in project management road is 10.42%. Result of factor analysis can see that responden toward conceptual constructability can more complication with capability controlling time schedule. One manner can be use for controlling time implementation is do â€œConstruction Methodâ€ as well, can do improving quality and safety implementation.

Analisa Kinerja Terminal Petikemas di Tanjung Perak Surabaya (Study Kasus: PT. Terminal Petikemas Surabaya) Supriyono, Supriyono
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 19, Nomor 1, JULI 2013
Publisher : Department of Civil Engineering, Diponegoro University

Container terminal performance as a system with many variables that influence it. Results of data analysis for research activities by field survey method in 2009, were TPS performance include BOR (quay performance) 53.77% and BTP (the number of containers passing through the quay) 1.61 box/meter long pier, YOR (field performance stacking) for export 23.91% and import 55.12%. Application of model scenario analysis, the changing the length of the quay cutting the time does not operate in the dock shows the change in the performance of container terminals, among others: Scenario A, the addition of 500m quay length can reduce the density on the quay marked with: BOR 43.02% BTP 1.29 box/m, and YOR 51.96%. Scenario B, time does not operate the sip could be reduced up to 2 hours so that berth time of 20.98 hours to 18.98 hours by eliminating time off between shifts with performance:BOR 48.64%, BTP 1.45 box/m, and YOR 46.30%. Scenario C, applying the minimum service time for the entire container unloading device performance with the BOR 39.72%, BTP 1.19 box/m and YOR 18.17%.

Pengaruh Curah Hujan Rata-rata Tahunan terhadap Indeks Erosi dan Umur Waduk pada DAS Citarum Hulu Bakhtiar, Bakhtiar; Hadihardaja, Joetata; Hadihardaja, Iwan K.
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 19, Nomor 1, JULI 2013
Publisher : Department of Civil Engineering, Diponegoro University

The aim of this study is to find out the effect of annual rainfall on the erosion index and the life of a reservoir. The erosion index is defined as the total soil loss divided by the tolerable soil loss. The life of a reservoir is affected by the amount of sediment flowing into the reservoir and sediment trap, which is a function of the effective capacity of the reservoir and the inflowing water. Soil and Water Assessment Tool (SWAT) version 2005 model was incorporated into this study to simulate hydrological processes taking place in the catchment. ArcSWAT (ArcGIS Interface for SWAT 2005) program was used as a preprocessing tool to write in input files to be executed by SWAT.SWAT model involves a great number of parameters. Hence, its reliability depends so much on the data availability and some parameter adjustments. From the calibration and validation results on annual data, the model is considerably of good performance. This was proven from the coefficient of correlation (r), coefficient of determination (R2), model efficiency (ME), and index of agreement (IA) which are close to 1 except for the sediment inflow. The difference between the observed and simulated sediment inflow resulted because the SWAT model accounts for the annual variation in precipitation and mean inflow discharge which is not manifested in the observed data. The modeling results revealed that the average inflowing sediment into the reservoir is 5,102,000 ton/year resulting in 46.18 year effective life of the reservoir which corresponds to the critical degree of 1.15. The graph plotting the values of the sediment inflow and the critical degree of the reservoir life reveals a linear relationship.

Analisis Keseimbangan Jumlah Armada Angkutan Umum Berdasarkan Kebutuhan Penumpang Putra, Adris A.
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 19, Nomor 1, JULI 2013
Publisher : Department of Civil Engineering, Diponegoro University

Urban area developing marked by there is in height of people activities/mobility in the effort to meet their need. The direct implication from the condition trigger to arise main problem, which is in term of transportation means supply. Increasing of transportation service demand is supporting people activities of Makassar City, therefore public transportation from time to time continually increase without the limitation of fleet amount that operating, so causing total fleet are incommensurate to people recruitments, and condition of public transport service by following activity broadcast pattern and city area using with radial causes several road internodes are passed of city transport route will overlap on one another because total operating fleet are incommensurate to passenger requirement (over supply). From the analysis result by using pick up and drop off data of public transport passengers (load factor) average only 0.33 percent on operating route in makassar city, that percentage show that publics transport fleet amount which necessarily be of service according to passenger requirement outgrow in Makassar City are 2.283 vehicle unit public or 51.5 % of 4.511 stock vehicle unit public transport.

Uji Kemampuan Bangunan Pengaman Mengurangi Longsoran pada Balas Rel akibat Banjir Atmojo, Pranoto Samto; Sachro, Sri Sangkawati; Budieny, Hary
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 19, Nomor 1, JULI 2013
Publisher : Department of Civil Engineering, Diponegoro University

Ballast rail has a vital fuction to support the trainâ€™s load and its dynamic forces. This load is then distributed to the subgrade layer through pile of gravel under the ballast. Most of the design about the gravel layer (ballast) doesnâ€™t take into account the effect of flood overflow on the rail, which is very likely to occur during rainy season. The Flood flows above the rail will reduce the ballast stability and then eroded. Part or most of the gravel were flushed out, thus resulting the ballast to be weak and may collapse, which is vey dangerous to the train traffic. Its therefore requires to investigate stability of the ballast under flood flow above the rail condition and any measure or improvement required by Hydraulic Modeling. The research is conducted at Hydraulic Laboratory, Diponegoro University. The model prototype is refer a tract rail at Mangkang-Semarang KM.12, with scale of 1:5. Its shown that the ballastÂ without a safety structure will start to scour when water level h1 = 15 cm , meanwhile with the structures Type 1 and Type 1 + 1 its start scour h1 = 17 and 19 cm respectively. The safety structure is able to scouring decrease , ie at the variation of h1 = 19 cm , there are 68.50 cm without structure, and with structure Type 1 and Type 2 areÂ 29 andÂ 26 cm respectively. This research shown that it needs to installing safety structure (sill) to reduce the danger cause of flood flow over the rail, especially at the flood prone area. The Management of train traffic could adopt this result how to protect of ballast scour cause of flood.

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