Racic : Rab Construction Research

EVALUASI PERILAKU DEFORMASI VERTIKAL BENDUNGAN SERMO BERDASARKAN DATA INSTRUMENTASI GEOTEKNIK

2023-06-26T13:32:29+07:00

The vertical deformation of the dam is one of the important parameters to be evaluated both during the construction and post-construction periods. Abnormal deformation behavior can cause various problems that threaten the safety of the dam. Evaluation is very important to do, especially on the Sermo Dam which has been loaded for more than 25 years to knows its behavior. Identification of abnormal behavior is done by evaluating the results of the vertical deformation analysis based on the instrumentation reading data against the acceptance criteria. In the construction, the vertical strain value compared with the depth below crest value resulted in abnormal behavior. However, evaluation of the settlement that occurs results in normal behavior. In the post-construction, evaluation with Sherard (1965) and ICOLD (1993) criteria resulted in abnormal conditions at certain elevations. However, evaluation based on the settlement index and acceptance criteria of Sowers (1965) and Hunter and Fell (2003) resulted in normal conditions.

PENINGKATAN KINERJA WADUK KEDUNGOMBO DENGAN MENGEMBALIKAN KAPASITAS TAMPUNGANNYA

2023-06-26T13:32:29+07:00

In every reservoir plan, the volume of dead storage provided is always taken into account to accommodate sediment entering the reservoir during the service life of the reservoir. Several studies on reservoir sedimentation show that 70% of reservoirs have sedimentation problems so the effective life of the reservoir will end before the design life is reached. The rate of sediment entering the reservoir will settle in the dead reservoir and the effective reservoir which will affect the performance of the reservoir. Therefore, it is necessary to take measures to improve the performance of the reservoir, one way is to restore its effective reservoir. Based on the results of bathymetry measurements of the Kedungombo Reservoir from 1989 to 2017, the sediment rate was 1.954 million m³/year. From the analysis of sediment distribution, the dead reservoir of the Kedungombo Reservoir at an elevation of +65.00 will be filled in 2089. The effective reservoir in 2089 at a normal water level of +90.00 of 527.71 million m³ has decreased by 106.89 million m3 from the initial effective reservoir is 634.6 million m³. To improve reservoir performance by restoring its effective reservoir, the Kedungombo Reservoir requires an elevation of the overflow or normal water level as high as 2.26 m with an inundation area of 48.72 million m².

Keywords: Sediment Distribution, Storage Capacity, Reservoir Performance, Kedungombo Reservoir

PENGGUNAAN EGG SHELL POWDER (ESP) DAN SUGARCANE PULP ASH (SPA) SEBAGAI BAHAN STABILISASI TERHADAP KUAT DUKUNG TANAH LEMPUNG

2023-06-26T13:38:46+07:00

Repairs to clay soils generally use stabilization methods to improve the properties of clay soils with additional materials mixed in the original clay soil to increase the soil bearing strength according to technical specifications in building construction. Egg Shell Powder (ESP) is a waste product from households and home industries with a high enough calcium carbonate (CaCO3) content to fill the holes between the pores and glue the soil particles together. Meanwhile, Sugarcane Pulp Ash (SPA) is one of the wastes from household products and sugarcane processing that is not utilized by the surrounding community to reduce environmental pollution. The research method used in this study was laboratory testing of the water content, specific gravity, and CBR values of the addition of ESP and SPA to clay with variations of 0%, 5%, 10%, and 15% and to the addition of 5% SPA. Results The original soil in this study was included in the CL soil classification, namely non-organic clay with low to moderate plasticity. The optimum water content value tends to decrease along with the addition of ESP and SPA to the original soil, namely the variation of ESP 15% and SPA, which is 19%, and the specific gravity value increases by 1,71 gg/cc. The CBR value increased with the addition of 15% ESP and 5% SPA, which was 9,23%.

MODEL INDEKS LIKUIFAKSI BERBASIS STANDARD PENETRATION TEST MENGGUNAKAN MULTI-GENE GENETIC PROGRAMMING

2023-06-26T13:32:30+07:00

Earthquake and series of specific phenomena in Palu and any other parts of the world contributed to a liquefaction that was involving massive fatalities and economic loss. The evaluation of liquefaction potential based on standard penetration test (SPT) data using deterministic approach has been widely applied. A liquefaction index model is required for the determination of a limit state between liquefaction and non-liquefaction cases by the consideration of bias issues in deterministic method. This research is aimed at the determination of liquefaction index model in relating (N₁)₆₀ and CSR_7.5 using multi-gene genetic programming (MGGP) to develop limit state curve and its comparison with previous studies. The developed liquefaction index model based on SPT data using MGGP resulted in a performance in terms of successful prediction of 93% for testing of datasets.

ANALISA PARAMETER HIDROGRAF SATUAN SINTETIK METODE NASH DAN SOIL CONSERVATION SERVICE (SCS)

2023-06-26T13:32:30+07:00

Water construction developments are increasing over time with the aim of preventing floods, raising water levels, and helping water resource management. However, in the planning process, debit data for 20 years is very difficult to obtain. Therefore, there is a Synthetic Unit Hydrograph (SUH) method to help analyze without using rainfall data and only using watershed characteristics for hydrological analysis. In this study, we will analyze the synthetic unit hydrograph parameters using the Nash and Soil Conservation Service (SCS) methods and compare them with data from the Gemawang AWLR in the Code River sub-watershed. A comparison was made to find out which method is suitable for the Code River sub-watershed at the AWLR Gemawang station. The suitability index or R² of the two methods shows results that are close to one or very related. The regression angle of the variation SCS method obtained an angle of 38˚, at the time of rising 36.5˚ and at recession time of 38.6˚. The Nash variation method gets 40.1˚ for one hydrograph data, 40.6˚ for rising time and 43.3˚ for descending time.

PENGARUH SERVANT LEADERSHIP PADA MANAJER PROYEK & KEPUASAN KERJA TERHADAP PROJECT SUCCESS FACTOR

2023-06-26T13:32:30+07:00

Proyek didefinisikan sebagai runtutan tugas yang harus diselesaikan untuk mencapai suatu hasil tertentu. Menurut Project Management Institute (PMI), istilah Proyek mengacu pada "setiap usaha dengan awal dan akhir yang pasti", meliputi berbagai macam industri, termasuk proyek konstruksi. Manajer proyek pada suatu proyek memiliki pengaruh terhadap kinerja pada pelaksanaan suatu proyek. Dengan demikian jenis kepimimpinan pada seorang manajer proyek juga akan berdampak terhadap kesuksesan proyek konstruksi. Lalu kepuasan kerja pada tim proyek merupakan perasaan/pendapat tim proyek akan pekerjaan mereka. Pada penelitian ini dilakukan analisa untuk mengukur pengaruh gaya kepemimpinan servant pada manajer proyek serta kepuasan kerja tim proyek, terhadap keberhasilan proyek dalam hal kinerja jadwal, kinerja biaya, kinerja kualitas, dan kepuasan pemangku kepentingan, terutama pada proyek-proyek konstuksi di Indonesia. Penlitian dilakukan dengan melakukan survey kuantitatif terhadap profesional proyek umum maupun proyek konstruksi di Indonesia dan kemudian hasil survey akan diolah dengan metode Structural Equation Modelling.

PEMODELAN BANGKITAN PERGERAKAN (TRIP GENERATION) PADA KAWASAN SEKOLAH TERPADU (STUDI KASUS : JALAN SULTAN SYARIF QASIM, JALAN HANGTUAH, DAN JALAN DR. SUTOMO KOTA PEKANBARU)

2023-06-26T13:37:04+07:00

The integrated school area is a place prone to traffic jams. The purpose of this study is to create a motion generation model. The method of data analysis and testing is linear regression analysis using a statistical program (JASP). Retrieval of data by counting the number of vehicles that deliver and pick up. Based on the results of calculations and analysis that has been done, the best model chosen for movement generation is Y1 = -44.826 + 0.241 X1 + 1.942 X2 + 7.294 X4 with an R² value of 0.996 and the best model chosen for movement attraction is Y2 = -60.461 + 0.235 X1 + 1.98 X2 + 7.92 X4 with an R² value of 0.995.

OPTIMALISASI KINERJA PERSIMPANGAN TIDAK SEBIDANG PADA KAWASAN PERBELANJAAN MALL SKA – LIVING WORLD (SIMPANG JL. TUANKU TAMBUSAI – JL. SOEKARNO HATTA) DI PEKANBARU

2023-06-26T13:37:54+07:00

Intersection Jl. Tuanku Tambusai – Jl. Soekarno - Hatta is a non-level APILL intersection which is in the SKA - Living World Mall Shopping Area, Peaknbaru City. Existing performance at Simpang Jl. Tuanku Tambusai – Jl. Soekarno - Hatta namely degree of saturation 1.05, intersection delay 645.5 seconds, and queue 371.10 m. This study aims to analyze the existing conditions using the PTV Vissim application simulation and the application of alternative scenarios for handling the problem. From the results of the analysis obtained several alternative scenarios for handling traffic problems at the Jl Intersection. Tuanku Tambusai – Jl. Soekarno - Hatta namely the diversion of traffic conflicts in scenario 1, setting the cycle time in scenario 2 and widening the road in scenario 3

ANALISIS PERBAIKAN TANAH DASAR MENGGUNAKAN METODE GEOTEKSTIL

2023-06-26T13:32:30+07:00

Soil acts as a building material in various types of civil engineering work, on the other hand land plays a role as a support for building foundations such as embankments, highways and railroads. Soil improvement is a type of soil stability that is useful as soil improvement and performance required by technical requirements. In an effort to increase the carrying capacity of the soil, several methods can be used, such as: soil improvement using Replecement Soil, PVD Method, Preloading, Micropile, Geotextiles, etc. In this study, the geotextile method was used as an alternative reinforcement to find a larger and better safety number (SF) for soil conditions adjacent to (Groundwater Table), and can be the most effective alternative soil improvement method. Based on the analysis of the data, it was concluded that the total load (q) is 31 layers of non-woven which is 2 layers, with a length of geotextile (L) of 1.825 m. The safety factor geotextile method non-woven = 2.4.

PERENCANAAN ULANG PERKUATAN STRUKTUR DERMAGA MENGGUNAKAN PONDASI TIANG PANCANG DENGAN VARIASI DIAMETER

2023-06-26T13:32:30+07:00

The wharf is one of the supporting facilities for the process of loading and unloading goods on ships. For services for long-term ships and loads caused by the process of loading and unloading ships, the safety of the wharf needs to be improved by strengthening the foundation. Berlian Pier uses a steel pile foundation with a diameter of 1.016 m and a length of 32 m. This study used the Meyerhoff method to calculate the bearing capacity of the piles and N-SPT data for the Reinforcement of Wharf Structures Using Diameter Variations at Berlian Surabaya Pier. Based on the re-planning that has been done, it is concluded that a diameter of 1.00 m and a length of 32 m obtains a single pile bearing capacity of 8164 Tons, shear resistance of 28120.4 Tons, axial bearing capacity of 8345.42 Tons. Immediate settlement of 38.551 mm, annual settlement of 00,0201 mm, long-term settlement of 0,193 mm, and total settlement of 48,050 mm.

Keywords: Variation Diameter, Carrying Capacity, Settlement

ANALISIS KONDISI KERUSAKAN JALAN PADA PERMUKAAN PERKERASAN LENTUR MENGGUNAKAN METODE PCI SERTA ALTERNATIF PENANGANANNYA (Studi Kasus : Jl. Raya Papar Kertosono, Kab Kediri STA 0+000 – 3+000)

2023-06-26T13:32:30+07:00

Roads include land transportation facilities that are widely used for Indonesians in traveling near or far. The growth of globalization can also have an influence on the level of mobility which has an impact on vehicle users and continues to increase. This causes the volume load of vehicles to exceed the limits of the designed road class, so that the quality and age of the pavement will continue to decrease. This research was conducted to analyze the condition of road pavement damage to damage to the Jl. Raya Papar – Jl. Raya Minggir with a length of 3 km. The method used for this research is PCI (Pavement Condition Index) with the aim of finding values based on the type, level and extent of damage to the method used and the selection of alternative treatments as a reference and road maintenance effort. The results of the research on the Jl. Raya Papar – Jl. Raya Minggiran STA 0+000 – 3+000 based on the PCI method obtains a total value of 47.6% Moderate (Fair) with the highest PCI value percentage of road conditions being 55% in Moderate road conditions (Fair), 25% in Bad road conditions (Poor), 8.3% on Good (Good) and Very Good (Very Good) road conditions, 3.4% on Very Bad (Very Poor) road conditions with alternative handling is periodic maintenance updates.

Keywords : Road Damage, Road Conditions, PCI

ANALISIS INDEKS KEKERINGAN METEOROLOGIS MENGGUNAKAN METODE STANDARDIZED PRECIPITATION INDEX DI KABUPATEN PELALAWAN

2023-06-26T13:32:30+07:00

Drought is one of the natural phenomena indicated by the limited availability of water above, on the surface and in the ground. Pelalawan District has a history of drought which occurred in 2015 and resulted in a water crisis. Drought index measurement with the help of spatial techniques is often the key in assisting monitoring to determine drought prevention measures. This study conducted a spatial analysis to determine the distribution of drought using the Standardized Precipitation Index (SPI) method a 3-month time scales. This research used monthly satellite rainfall from 2010-2019. The results of the analysis show that extreme drought conditions occurred in June 2015 in Kuala Kampar sub-district with a value of -3.70.

IDENTIFIKASI TINGKAT PEMAHAMAN KONTRAKTOR TERHADAP BIM (BUILDING INFORMATION MODELING) DI RUANG LINGKUP KOTA BALIKPAPAN

2023-06-26T13:32:30+07:00

Currently, in Indonesia the world of construction is growing rapidly, then there is an increasing need for technology to streamline and streamline work in the construction sector. To overcome this, a system called Building Information Modeling (BIM) was created. Compared to conventional methods, the BIM system integrates construction work that can save time and money. To find out the obstacles of contractors in using BIM, this research was conducted to find out the level of understanding of contractors towards BIM and inhibiting factors in implementing BIM. The object of this research is contractors in Balikpapan City, both state-owned and private. By analyzing from various literature and respondents' sources, which make the foundation of this research takes place. In decision making of BIM implementation in Balikpapan City, the results of this research can be considered. The results of the research data analysis and discussion regarding the level of understanding as well as implementation barriers and solutions provided are the results obtained. In implementing the use of BIM, the level of understanding of contractors and practitioners is 0.43 or can be called 43% which means that contractors do not understand BIM. The biggest obstacle in implementing BIM from the analysis of the largest value of 4.4 is the lack of human resources capable of fully operating BIM. Synergizing between all private and state-owned parties to coordinate with each other and provide counseling on the use of BIM in the future is the solution to the obstacles.

PENURUNAN KEKUATAN TANAH TERSTABILISASI PALM OIL FUEL ASH BERBASIS ALKALI AKTIVATOR MATERIAL DILINGKUNGAN GAMBUT

2023-06-26T13:32:30+07:00

Peat water contains low pH and acid caused corrosive on cementation structure as stabilized soil based alkali activated POFA. The soil samples mixed with different percentages of POFA (5%, 10%, and 15%) and alkali activator solution (sodium silica; Na2SiO3) and sodium hydroxide, NaOH) were immersed in peat water for various durations (0, 7, 14, and 28 days). The test results for the physical properties of the soil showed that the addition of POFA decreased the plasticity index and increased the optimum moisture content (OMC) while reducing the dry density (MDD) of the soil mixture. Furthermore, the unconfined compressive strength test indicated that the soil's strength increased at a 5% and 10% POFA content after 7 days of immersion, with strengths of 760 kPa and 1312 kPa, respectively. However, the strength significantly decreased by over 50% after 28 days of immersion, reached 365 kPa and 372 kPa for the respective POFA contents. A slight increase in soil strength was observed with the addition of 15% POFA content during the immersion period. Although the strength obtained after 28 days was almost the same for all mixtures at 356 kPa, higher levels of aluminosilicate synthesis as 15% POFA can enhance the bonding strength between soil particles, making the test specimen more resistant to acid attack.