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International Conference on Coastal and Delta Areas
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Articles 122 Documents
Bending capacity of reinforced concrete beam with a rough aggregate of 2/3 teak pieces Purwanto, Purwanto; Satyarno, Iman; Triwiyono, Andreas
International Conference on Coastal and Delta Areas Vol 3 (2017): The 3rd International Conference on Coastal and Delta Areas
Publisher : International Conference on Coastal and Delta Areas

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Abstract

The development of science, especially in civil engineering, demands a better concrete technology. Replacing the rough aggregate with teak pieces of length 2 cm, width 3 cm, and height 2 cm was tried to reduce the weight of the concrete. This wood was selected because of its light. The testing phases included: testing of concrete cylinders and testing of reinforced concrete beam bending. The bending beam test was done by making a specimen with dimension of beam: width 120 mm, height 150 mm, and length 1200 mm. The main reinforcements used were 2Ø10 mm and 3Ø10. For the chock, Ø6-50 reinforcement bar was used. On the test of concrete cylinder results with soaked rough aggregates, it was found that compressive strength at 28 days old was 5.09 MPa and 4.74 MPa for non-soaked aggregate. On the test of reinforced concrete beams with 2 pieces of tensile reinforcement, it was found the average maximum load of 26300 N and average deflection of 6.99 mm. The average of reinforced concrete beam with 3 pieces of tensile reinforcement was 30500 N and average deflection of 8.66 mm. The bending strength of reinforced beam with 3 pieces of tensile reinforcement average was 5.34.106 Nmm. The comparison of calculation result between experiment and theory was found that load and moment for 2 pieces of tensile reinforcement was 0,72%, while comparison between load and moment for 3 pieces of tensile reinforcement was 0,58%. Keywords: teak wood, lightweight concrete, load beam capacity.
Sedimentation Handling Model Of Sediment Reservoir On Darma Reservoir Das Cimanuk – Cisanggarung Kuningan Regency Khamid, Abdul
International Conference on Coastal and Delta Areas Vol 3 (2017): The 3rd International Conference on Coastal and Delta Areas
Publisher : International Conference on Coastal and Delta Areas

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Abstract

Reservoir is a water reservoir in a watershed which is used to irrigate agricultural land, fisheries, water regulator (flood controller), watershed catchmentdams channeled by outlet (river) to the reservoir so as not to flow and stagnant in places beneath it and used for drinking water, as well as tourism. As one of the efforts to overcome the flood, it is necessary to revitalize the water structures as a shelter for rainfall runoff and sediment storage building.This research took a case study at Darma Reservoir. In this study, the analysis was performed using Hydrologic Engineering Center-River Analysis System (HEC-RAS). Based on the simulation results of the existing conditionflow, there is a water runoff at River Station (RS) 10 and RS 9. Hence, the design of sediment reservoir building is performed by using Homogeneous Dam as a prevention of overflowing in Darma Reservoir leading to Cisanggarung watershed. The calculation of water potential is based on Rainfall data, while irrigation water demand is calculated based on irrigation total area, water requirement standard for rice plant and crops, industrial water requirement standard based on BWRP Guidelines, Dit.Jen SDA, drinking water requirement standards based on Dinas Cipta Karya and the standard of fishery needs based onDirectorate of Irrigation. One benefit from the calculation of water discharge is for flood control. Measure to be able to control the overflow of river water so it is not too abundant at certain times that can cause flood is to know how much value of the water discharge. The conditions of water that remain in control can be profitable for the fishing business there. The calculation of the discharge can also indicate a response due to changes in bio-geophysical characteristics that occur in a watershed (by watershed management activities) or changes (seasonal or yearly fluctuations) of the local climate. It can later be useful for the subsequent management of the watershed in accordance to the law of natural balance (ecology) which ultimately creates environmental sustainability. The maintenance of watershed ecology is very beneficial to keep the fishery business running in this water body because the ecosystems in it live with supportingconditionfactors (Asdak 1995). Keywords: Reservoir, DAS. Sedimentation, HEC- RAS
The Influence of Seismic Load to Deformation of Dam Sari, Undayani Cita; Rochim, Abdul; Partono, Windu
International Conference on Coastal and Delta Areas Vol 3 (2017): The 3rd International Conference on Coastal and Delta Areas
Publisher : International Conference on Coastal and Delta Areas

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Abstract

Disaster mitigation due to seismic load (earthquake) needs to be considered. This is especially for dam structure used as a reservoir and water resource. Because of the main function, and building dimension is too large, thus if the dam collapse it will cause a significant catastrophe for the surrounding community and environment. One of the seismic damages to the dam is deformation. This paper presents the effect of seismic load on deformation of dam model simulation. This study took place on the Sermo Dam, Yogyakarta which is located close to Opak Fault –as the suspicious cause of the earthquake in Yogyakarta. Seismic loads used in this study in terms of acceleration time histories. Therefore model can be carried out using PLAXIS simulation. This selected seismic load variations are on the range 5.0-7.0 Mw and epicentrum distance is also restricted in 15-31 Km based on the nearest epicentrum distance between Sermo Dam and Opak Fault. Keywords: seismic load, deformation, dam, modeling
Analysis on Soil Liquefaction Potential in Pangandaran Coastal Area West Java Chaerunisa, Anida; Asriana, Asriana
International Conference on Coastal and Delta Areas Vol 3 (2017): The 3rd International Conference on Coastal and Delta Areas
Publisher : International Conference on Coastal and Delta Areas

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Abstract

Pangandaran, West Java is well known as an earthquake prone area. The impact of an earthquake in a coastal area which contains saturated sand soil is liquefaction potential. This phenomenon occurs when earthquake hits, the water pore pressure increases and the effective stress becomes nil then the soil loss its shear strength. With the objective to study the liquefaction potential in Pangandaran coastal area, this analysis was conducted. Two kinds of analysis were performed by manually calculation method and using Quake Geostudio program. Seed’s method based on safety factor as a key control to determine the liquefaction potential was used. This method requires N-SPT data. The result of the analysis showed that based on Seed method with a value acceleration of earthquake is 0,5g, FS value is 1,55. This value means that Pangandaran coastal area is not susceptible to liquefaction. From the analysis using Quake, as ground acceleration increases, pore water pressure also increases. It means the higher of ground acceleration can have liquefaction potential. Keyword : Liquefaction, Seed method, ground acceleration, Pangandaran
The Value Engineering Analisys Of Drainage Job (Study Case at Cluster Naraya Project of Bukit Semarang Baru) Ridwan, Muhammad Afif; Adi, Henny Pratiwi; Adhy, Djoko Susilo
International Conference on Coastal and Delta Areas Vol 3 (2017): The 3rd International Conference on Coastal and Delta Areas
Publisher : International Conference on Coastal and Delta Areas

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Abstract

Value engineering is a decision-making process based systematic and structured multi disclipinary. Drainage is a disposal water mass media in natural or artificial from the surface or subsurface of a place. In the housing scope, drainage is enabled to accomodate the flow of used water and rain water from the house which then flowed into the downstream or river as the final disposal place. The purpose of this study is to assess the initial design of the stream viewed from the cost budget plan. Find out whether the alternative design are required, find out the ideal alternative design, and get a comparison between the initial design and the alternative design. The result of this research is the analysis of budget plan, the production cost of initial design with u-ditch and buis concrete material is inefficient with budget of cost Rp. 1.781.350.200,- and then made alternative design buis concrete precast with budget of cost Rp. 1.104.667.700,- . After comparison between initial design and some alternative design, it is known that alternative design that can be recomended to be done is the alternative design with buis concrete precast material because it has lower price, by the difference of profit Rp. 676.672.500,-. Keywords : Value Engineering, Drainage
Repairs Of Expansive Land For Sub Grade Roads Pratikso, Pratikso; Mudiyono, Rachmat; Mahmud, Faizal
International Conference on Coastal and Delta Areas Vol 3 (2017): The 3rd International Conference on Coastal and Delta Areas
Publisher : International Conference on Coastal and Delta Areas

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Abstract

Subgrade is the most important part in laying the building structure, especially for road construction. The improvement of the quality of road facilities is carried out with initial planning on good pavement layers and should consider the type and strength of subgrade. Road conditions are often damaged in the structure of the road surface layer because it is caused because the structure of the soil in the area often experience shrinkage causing the road becomes cracked and even waving. It is therefore necessary to experiment to stabilize the soil by improving the gradation of mixing the original soil with a larger graded material of rice husk ash, in several experiments with several samples and aggregate mixture to find out the free press value on soil tested both before and after stabilized. The test results showed free press value of comparison between mixing using inorganic salts and lime has increased soil bearing capacity. From the results of this study can be concluded that the addition of the right stabilizer material on expansive soil is good enough to be used to improve the physical and mechanical properties of expansive soil. Keywords: Subgrade, expansive soil, soil stabilization, stabilizer material, soil bearing capacity
Effects Of Mixed Asphals With Feldspar Filler Modification On Oil Asphals Latifun, Latifun; Antonius, Antonius
International Conference on Coastal and Delta Areas Vol 3 (2017): The 3rd International Conference on Coastal and Delta Areas
Publisher : International Conference on Coastal and Delta Areas

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Abstract

Each composite material in a pavement mixture gives different variations of characteristics and performance, therefore it is still necessary to test the variations of the material to find the suitability of the use, so that by testing it can contribute information about the use of materials that can be used as an alternative in reference to choosing a replacement material This study aims to determine the characteristics of marshall using asphalt binder modified polymer AC 50/70 by using the material of feldspar stone ash, in terms of Marshall stability, flow VF, VIM (Void in Mix), VIM (Void in Bix) VMA (Void in Mineral Aggregate), MQ (Marshall Quotient), and. Density, This research uses hot mixed asphalt test (Hot Mix) with Marshall method. The asphalt content used was 4%, 4.5%, 5%; 5.5%; 6%; 6.5%; and 7% with each variant made 5 specimen. Implementation of the research was conducted at Civil Engineering Laboratory Faculty of Engineering, Islamic University of Sultan Agung Semarang. Implementation stages include aggregate examination (fine aggregate and coarse aggregate), filler examination, manufacture of asphalt concrete mix test and test using Marshall method. Keywords: Asphalt mixture, feldspar, filler, Asphalt oil
Strategy of Natural Disaster Management of Rob In Tanjung Emas Port Area Based on Value Engineering Analysis and Stakeholder Expectations Setiyawan, Prosis; Wahyudi, Slamet Imam; Wibowo, Kartono
International Conference on Coastal and Delta Areas Vol 3 (2017): The 3rd International Conference on Coastal and Delta Areas
Publisher : International Conference on Coastal and Delta Areas

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Abstract

Tanjung Emas Port was inaugurated by the government in 1985 and became the main entrance of export and import goods to and from Semarang. So many big companies are building their factories in this area. There is even an industrial estate called Tanjung Emas Processing Zone (TEPZ) which some companies enter in bonded zone. Yet this port faces an ever-present problem, namely rob coming from tidal water and also a continuous decline in soil surface. In order to protect the various port facilities, it is necessary to create a robust flood handling system that is economical, efficient and accurate. The aim of this research is to get the result of handling of inundation based on value engineering analysis and the best stakeholder expectation. Value engineering research approach is directed to the analysis of a function that is a way to get or know the functions that are not needed. The function is presented in the comparison of Cost and Worth. VE analysis in this study was conducted by comparing the handling of rob disasters between polder systems with road elevation. Analytical techniques used include information stage, functional analysis phase, creative phase, evaluation phase, development stage and presentation stage. Keywords: rob handling, value engineering, stakeholder expectations, Tanjung Emas port
Assessment of Geotechnical Feasibility in Development of STIE BPD Semarang Fitriyana, Lisa
International Conference on Coastal and Delta Areas Vol 3 (2017): The 3rd International Conference on Coastal and Delta Areas
Publisher : International Conference on Coastal and Delta Areas

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Abstract

Geotechnical studies are an early stage for planning an infrastructure. In general, the geotechnical parameter value of a region is determined by soil characteristics. To know the condition of the soil layer under the structure, it is necessary geotechnical investigation. Toptografi uneven shape and the value of the low bearing capacity causes the need for planning the reinforcement. The reinforcement used is soil nailing and retaining wall. In this feasibility test used analysis of soil bearing capacity with plaxis program. The results of the analysis show that the reinforcement at the construction site of STIE BPD raises the value of its Savety Factor reaching 5.83.  Keywords: Geotechnical investigation, soils bearing capacity, reinforcement.
The Analysis of Liquefaction Potential Based on A Comparation of Various Cyclic Resistance Ratio Kuningsih, Tri Wahyu; Kusumawardani, Rini
International Conference on Coastal and Delta Areas Vol 3 (2017): The 3rd International Conference on Coastal and Delta Areas
Publisher : International Conference on Coastal and Delta Areas

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Abstract

Prambanan Temple located in the Special Region of Yogyakarta is one of the most beautiful temples in the world. One of the potential geo hazards in the region of Prambanan is the earthquake. Geotechnically, the condition of the soil layer in Prambanan Temple consists of fine and uniform sand. Therefore, there is a possibility of liquefaction, if it receives the earthquake load. This study was aimed to investigate the condition of the subgrade of the Prambanan Temple foundation against the potential of liquefaction. Analysis of liquefaction potential in Regions Prambanan was conducted using semi-empirical method which were the cyclic stress ratio and cyclic resistance ratio with data from the field test results, Standard Penetration Test. The calculation of the value of peak ground acceleration was conducted using various empirical formula. The parameters of the liquefaction threat were based on Liquefaction Potential Index, Liquefaction Risk Index and Liquefaction Severity Index. The analysis showed that the peak ground acceleration value based on the 2006 Yogyakarta earthquake with a magnitude of 6.3 was 0,216g. Based on the condition of existing Prambanan temple with ground water level at -12 meters depth was safe against liquefaction threat. In case of an earthquake with greater strength than the 2006 Yogyakarta earthquake, with a PGA of 0.3 to 0.4g and shallow water level (-1 meters), then liquefaction might potentially occur. Keywords: Liquefaction, Cyclic Stress Ratio, Cyclic Resistance Ratio, Peak Ground Acceleration, Prambanan Temple

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