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WAHANA TEKNIK SIPIL
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WAHANA TEKNIK SIPIL merupakan media komunikasi dan diseminasi hasil-hasil penelitian, studi kasus, dan ulasan ilmiah (terapan) bagi ilmuwan dan praktisi dalam bidang teknik sipil. Jurnal ini diterbitkan oleh Jurusan Teknik Sipil Politeknik Negeri Semarang secara berkala enam bulan sekali, yaitu Juni dan Desember.
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Articles 76 Documents
ANALISIS PARAMETER STATISTIK BUTIRAN SEDIMEN DASAR PADA SUNGAI ALAMIAH (Studi Kasus Sungai Krasak Yogyakarta) (1), Junaidi; (2), Restu wigati
WAHANA TEKNIK SIPIL Vol 16, No 2 (2011): WAHANA Teknik Sipil
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AbstractNatural rivers are characterized by a meandering channel with multiple grain-size bed and unsteady flow. Among some of the properties of the sediment grains, the size of the sediment is one of natures most important and widely used in sedimentation engineering. Grain size greatly affects the easy presence and extent of sediment transported. To study the characteristics of bed material on the sediment transport, various studies have been conducted. This paper examines statistical parameters of grain on the sediment transport from a natural river (River Krasak, Yogyakarta). Variables studied include the classification of grain size, mean (average), standard deviation (sorting), skewness, and kurtosis. Based on the statistical parameters of grain size, the results from three stations showed that bed materials of Krasak 1 are characterized by gravel mode, very poorly sorted, and distributed platikurtic negative skewness. Types of samples are polymodal. Bed materials of Krasak 2 are characterized by the mode of sand, and poorly sorted, and distributed platikurtic very positive skewness. Type of samples are bimodal. While the bed material of Krasak 3 are characterized by sand mode and poorly sorted, and distributed platikurtic very positive skewness. Types of samples are polymodalKata kunci : sungai alamiah, parameter statistik butiran, mean, sorting, skewness, kurtosis, platikurtic, bimodal, polymodal
ANALISIS TANAH DASAR PONDASI TERHADAP KESTABILAN KEDUDUKAN BANGUNAN _, Hartono
WAHANA TEKNIK SIPIL Vol 17, No 1 (2012): WAHANA Teknik Sipil
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Abstract A very influential factor in the development of cities in Indonesia are natural population growth and migration from rural to urban areas. The increase in population led to the need for housing is also being increased. The rice fields and hills farm lot converted into residential complexes. Changes in land use is a major cause floods and landslides. The loads addition in body the slopes by making residential building or villa on the edge of a slope or on a hilltop is a effect risky action landslides. From result testing soil housing in Bukit Mutiara Jaya II, the carrying capacity of the land base is still able to support the weight of the building, namely: QB = 0.217 kg / cm2 <Qall = 0.285 kg/cm2 (still safe). On the case of residential Bukit Mutiara Jaya II decreased and the slope of the walls and cracks in some buildings in the residential location, not because of low soil bearing capacity but due to technical error implementation, it is also prone to landslides because the soil in the form of land use in paving pile above the original ground sloped slopes between 15-40%, which is not compacted properly functioned converted into a dwelling or housing. Where land in a pile on the surface of the slope be spread out natural land directly used for the placement of the building foundation besides causing land subsidence and landslides when it rains, it is also due to the spread of the load is not evenly distributed and downs of the carrying capacity of the land caused by decreased physical and mechanical properties due to the presence of water in the soil body slope.Kata kunci : dwelling, land-uses, housing, soil stability, bearing capacity.
ANALISIS KEGAGALAN KONSTRUKSI DAN BANGUNAN DARI PERSPEKTIF FAKTOR NON TEKNIS Wiyana, Yustinus Eka
WAHANA TEKNIK SIPIL Vol 17, No 1 (2012): WAHANA Teknik Sipil
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AbstractConstruction failure is not uncommon as the construction industry is very complex, where many parties involved and processes take place in an open space. The construction failure and the building failure might be caused by either the technical or non-technical factors. The non-technical factors mostly derive from the lack of resources competence in the business entities, the employee skill, and the expertise. This paper discusses the mutual relationship between the SBU (Business Entity Competence), the SKA and the SKT (Man power Competence), and the Construction failure. This research is conducted to analyse the construction failure from the perspective of the resources competence with regard to specially the SBU, the SKA, the SKT, where as the aims of this research is to indentify the non-technical factors causing the construction failure and the building failure in Central of Jawa, and also to analyse the contributions of the SBU and the SKA and the SKT toward the Construction failure. The factors that influence the failure was measured in the qualitative model and simulated with the LPS method using the causal relationship approaches between the variables supported by the TETRAD program IV vertion 4.3.9-18. The result of the research reveals that the failure variable are structurally affected by the SBU variable 0,1181, by the SKT variable at 0,0501, and by the SKT for 0,0250. The test processes of the SBU, the SKA, and the SKT has not been implemented properly so that the certificates issue can not yet be justified. The resource conditions in the district and the city around the project area are still troublesome, such as lack of the man power having the SKT, and the SKT, and there are many skilled workers that have not got the competence test.Kata kunci : Construction failure, Building failure, Business Entity Certificate, Expertise Certificate, Skills Certificate.
PENGARUH PEMANFAATAN LIMBAH BATUBARA (FLY ASH) TERHADAP KEKUATAN TEKAN MORTAR TYPE M (1), Kusdiyono; (2), Moch Tri Rochadi
WAHANA TEKNIK SIPIL Vol 17, No 2 (2012): WAHANA Teknik Sipil
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Abstract Fly ash and bottom ash is a solid waste generated from coal burning power plants. Solid waste is present in large enough quantities. The amount is quite large, so it requires a management that does not cause environmental problems such as air pollution, water and ecosystem degradation. The research done in the field of Engineering Materials Research in an effort to utilize industrial waste that can be used for mortar to other industrial materials, and the results of the study are intended to address the increasingly complex problems of the solid wastes such as fly ash and how to maximize its utilization. One way to capitalize is made mortar. To determine the extent of the effect of adding fly ash on compressive strength of mortar, the addition of the composition is mixed with fly ash ranging from 0%, 5%, 10%, 15% and 20% of the weight of cement with water factor cement is determined the same in all variations of the mixture. The samples used were cuboid (5 cm x 5 cm x 5 cm), planned mortar is Type M. The samples were tested at ages 7, 14, 21 and 28 days, with the first treated before testing. Total sample of 60 fruit, consists of five variations and each variation of a total of 12 pieces. The results obtained increased compressive strength highest average in the addition of Fly Ash every 5% of the well at a young age (7 to 28) days with the highest compressive strength 7 days reached 373.71 kg / cm ² at 20% addition of Fly Ash and 403, 41 kg / cm ² for the addition of 15%, the compressive strength was the lowest average age of 14 days obtained at 307.68 kg / cm ² at 5% addition of Fly Ash and 28 days amounted to 355.78 kg / cm ² to mix mortar with the addition of Fly Ash of 10%. With the regression equation Y = 8.244 X ² - 40.47 x + 384.3 and the correlation R ² = 0.987. This is because Fly Ash has a fine grain that will make the mortar more slashy (workable), solid and makes cavities between aggregate grains filled by Fly Ash, so that the pores and cavities become smaller, thereby increasing the compressive strength of mortar. Thus the picture of the use of Fly Ash as a mortar significantly provenKata kunci : fly ash, compressive strength, mortar type M
PENGARUH PENAMBAHAN KAPUR DAN SEMEN TERHADAP NILAI CBR TANAH LEMPUNG MERAH _, Ukiman
WAHANA TEKNIK SIPIL Vol 18, No 1 (2013): WAHANA Teknik Sipil
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AbstractGranular of soil as a material supporter of building foundations, heavily influenced by the physical properties of water. Moreover, the fine-grained soil clays in particular, due to water entering the soil particle then inflate and vice versa due to reduced ground water will shrink. Red clay soil stabilization with lime and cement materials, seeks to increase the carrying capacity of the soil as subgrade layer to buffer the load through the foundation component that serves to spread the load on it to buffer the soil section. In addition to the added material lime and cement as filler material also serves as a lasting cementation thus increase the carrying capacity of the red clay soil. Better material cemented its CBR value increase of the lime.Kata kunci : nilai CBR, kapur, semen, lempung merah
ANALISIS FAKTOR KONSERVASI KOMBINASI TERAS NIKOLAS DAN TANAMAN KACANG TANAH (FAKTOR CP UNTUK TERAS NIKOLAS + KACANG TANAH) _, Mawardi
WAHANA TEKNIK SIPIL Vol 18, No 2 (2013): WAHANA Teknik Sipil
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AbstractEach of land use is going to give effect to erosion , land damages and run off. Land use policy and it’s conservation can be ditermined from the prediction result of erosion and the permitted erosion rate that is determined. Peanute is one of agrybisnis comodities that have a higher economic value among some kinds of plants else. It is possible enough to be developed in Indonesia. Sustainable development demands to each land user has to take care of conservation principles in order to getting sustainable use and it’s pruductivity kept. Land use policy and it’s conservation can be determined from result of predicted erosion rate and soil loss tolerance. Generally, some factors influence to the erosion rate are precipitation, topography, vegetation and human factor. To anticipate development of peanute plant, it needs to studying about practice factor of concervation and factor of vegetation management. The objective of research is to analyze value of CP factor of USLE equation, that is combination of crop management factor (C) for peanut and practice conservation factor (P) especially nicols terrace. The research is conducted with field measurement approach method by model of plots and by specifications : at field land with 10 % slope, length of land slope 20 m, type of soil Dark Brown Mediterranean (Alfisol/Inceptisol), for about 3 months and amount of precipitation rate about 257.72 mm/month. The research has given a result that CP factor of USLE equation for nicols terrace that combined to vegetation of peanut (CP value for nicols terrace + peanute) is about 0,32.Kata kunci : conservation factor, corp management, USLE, cultivate land management, nicols terrace, peanute
PEMODELAN MANAJEMEN PEMELIHARAAN KOMPONEN ARSITEKTURAL GEDUNG DIREKTORAT POLITEKNIK NEGERI SEMARANG (1), Mohammad Abdul Jalil; (2), Resty Amalia; (3), Marsudi; (4), Martono
WAHANA TEKNIK SIPIL Vol 19, No 2 (2014): WAHANA Teknik Sipil
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AbstractGovernment buildings are buildings used for official purposes. Condition of the building must be taken to ensure that the activities there are running smoothly. One of the solution by doing some maintenance management well. This is related to maintenance activities at the Directorate Building of State Polytechnic of Semarang as one of public universities in Semarang. The purpose of this study is to enhance building maintenance management by arranging modeling Standard Operational Procedure (SOP) for the maintenance and care, especially on architectural components of Directorate Building State Polytechnic of Semarang. Observations on object research, literature study, testing on SOP modeling and interviews are some methods of research to be conducted in this study. All data were analyzed which then bring out some output SOP maintenance modeling component architecture which provides manual book, routine and periodic scheduling maintenance actions, flow charts and also checklists form. Where the manufacturing modeling of SOP will be tested is based on Permen PU No. 24/PRT/M/2008 on the Guidelines of Building Maintenance and Repair and also other related regulations.Kata kunci : modeling, management, maintenance, repair
PENANGANAN LIMBAH ORGANIK PADA TAMBAK UNTUK MEMPERBAIKI KUALITAS TANAH DASAR TAMBAK Budi, Basuki Setiyo
WAHANA TEKNIK SIPIL Vol 20, No 1 (2015): WAHANA Teknik Sipil
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AbstractPond development a river embankment Samtren Mangunharjo Tugu Semarang is done without regard to the technical prerequisites such as irrigation systems, supply and exhaust channels, broad expanse of the maximum, planning, design, layout and construction of ponds that are less coordinated, and without management contaminant causing environmental degradation Mangunharjo region, which in turn lowers the productivity of the pond. The purpose of this study is to examine the fundamental characteristics of organic matter on the pond bottom soil by using micro-organisms. Contact time and the process by utilizing micro-organisms is the novelty of this study. Provision of organic waste is influenced by two factors, the first factor is the large concentration of micro-organisms that function as decomposers of organic waste and controlling selectivity allowance to degrade organic waste. The second factor is the contact time is the period average - Average required to react with the organic waste in the soil microbial pond. To gain a comprehensive understanding of the process, this research is focused on reduction of process parameters by utilizing micro-organisms and the contact time and concentration of organic waste. While the technical aspects paralleled through laboratory experiments, theoretical models and pilot-scale test in the pond. Characteristics of the allowance system is analyzed based on the rate of elimination of organic waste organic wastes, contact time and concentration of micro-organisms. Evaluation was also conducted to determine the feasibility and advantages of technology and commercial applications. Research conducted laboratory scale then performed preliminary studies with varying characteristics of process parameters of micro-organism concentration, contact time, developed a management model and the characteristics of the organic waste to the pond bottom soil management and techno-economic evaluation. This study provides measurable outcomes such as: (i) management models and characterization of organic waste in the pond bottom soil in coastal environmental management of the effort. (ii) Product pond bottom soil management technologies. (iii) scientific publications in journals.Kata kunci : pond bottom soil, organic wastes, micro-organism
KAJIAN BALOK – KOLOM UTAMA DAN SAMBUNGANNYA PADA RUMAH PANGGUNG SISTEM FLOOR LIFTING METHOD _, Sukoyo
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol 20, No 2 (2015): WAHANA Teknik Sipil
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AbstractSemarang is one of the cities that most of its territory is always inundated by tidal water, especially in areas near to the beach. Most of the houses in these areas often take in rob water, so the house becomes less healthy and less comfortable. Therefore we want to make a home stage floor can be raised with the increase in tidal water using a jacking system, which we call the stage house floor lifting method. The success of the house lifting depends on the model of the main beams and columns and its connection.Therefore we try to overcome the problem by doing research with the aims: (a) Planning main column model (b). Planning main beam model (c). Planning the main beam - column connection system. Methode research done by making several alternative column model, beam and joint and then tested in the laboratory, which is then compared with the real burden for small home (<30m2). Outcomes of this research are (a). The column used is made of reinforced concrete with a hole interval of 20 cm. (b). The beam used are profile IWF 15. (c). Connection beam and column using 4 bolts 12 mm.Kata kunci : house stage, floor lifting method, main beam, column, beam-column connection
PENGARUH PEMAKAIAN LIMBAH GENTENG BETON TERHADAP MUTU BETON SEDANG _, Warsiti
WAHANA TEKNIK SIPIL Vol 16, No 2 (2011): WAHANA Teknik Sipil
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AbstractIn line with the economical development, there are a lot of old buildings renovation which produces material waste like roof tile.To use the existing roof tile waste, the research on the use of cncrete roof tile waste for concrete mixture was performed considering that concrete roof tele fraction is hard enough. By using part of concrete roof tile fraction in the agregate for concrete mixture, it is expected that it doesn’t affect the quality or pressure strength of produced concrete. This is more economical since the pebble price is more expensive than concrete roof tile price. The aim of the reseach is to find out the percentage of concrete roof tile fraction in the coarse aggregate for concrete mixture so that it doesn’t affect the concrete pressure strenght, seek for the correlation between concrete pressure strenght and the precentage of concrete roof tile fraction in coarse aggregate for concrete mixture, seek for the correlation between concrete pressure strenght and aggregate weathering. In the research, the testing material is in the form of cube 15 x 15 x 15 cm with slump value as the fixed variable mean while the non fixed variable is the precentage of concrete roof tile fraction in the mixture, that is 0, 10, 20, 30, 40, 50 % of is coarse aggregate. From the result of the research, it is obtained that in the 10 % percentage of concrete roof tile fraction, the generated concrete pressure strength doesn’t change or has no influence. The correlation between concrete pressure strength and the percentage of concrete roof tile fraction in the aggregate is y = -1.539 x + 242.6 and the correlation between concrete pressure strength and the aggregate weathering is y = -6.519 x2 + 242.2 x – 2013. With the percentage ot roof tile fraction in the aggregate asmuch as 50 % may affects the decreasing of concrete quality and the concrete pressure strength reaches 29.5%.Kata Kunci : aggregate composition, concrete quality. pressure strength