Jurnal Rekayasa Teknik Sipil dan Lingkungan - CENTECH

STRATEGI PENGENDALIAN BANJIR TERPADU DI SUB DAS MELAWI KALIMANTAN BARAT

Tue, 31 Oct 2023 00:00:00 +0000

As in Indonesia in general, the Melawi Sub-watershed, part of the Kapuas River Basin, is also experiencing an increasing frequency of flooding. Currently, flooding in the Melawi Sub-watershed occurs not only in urban areas but also in rural areas in the middle and upper reaches of the Melawi Sub-watershed. To reduce the impact of floods in the Melawi Sub-watershed, a comprehensive and integrated flood control and management effort is needed. Whole means taking an approach that sees the Melawi Sub-watershed as an inseparable unit, including the upstream, middle, and downstream parts. Integrated means that flood control and management are carried out by considering technical, environmental, social, economic, legal, and institutional aspects in and around the Melawi Sub Watershed. This research aims to create a concept that can be used and applied in minimizing flooding in the Melawi Sub Watershed to prevent the frequency of flooding in the Melawi Sub Watershed from increasing by creating an integrated flood control strategy from various sectors. The results of this study can be helpful for policymakers in West Kalimantan, especially Sintang Regency and Melawi Regency, in overcoming flood problems in the Melawi Subwatershed. This research used secondary data (rainfall data, maps, and information from previous studies) and primary data (soil sample data, Focus Group Discussion results) with geographic information system software and MS Excel for analysis. The spatial analysis shows that flooding in Melawi Sub Watershed mainly occurs due to land conversion for settlements, plantations, and mining.

ANALISIS GEOTEKNIK DITINJAU DARI KARAKTERISTIK KUAT GESER MATERIAL LONGSORAN PADA BATAS KOTA JAYAPURA KABUPATEN KEEROM-ARSO STA. 66+327)

Edoward JP Pardede, Duha Awaluddin, T Bernathius — Tue, 31 Oct 2023 00:00:00 +0000

Landslides Geotechnical analysis of the shear strength characteristics of landslide material on the Trans Papua national road, Arso-waris Yetti KM.66+327 segment, soil physical properties test based on laboratory test results on landslide material obtained at a depth of 1.00 m to 1.50 m is the water content. Original average: 21.25, specific gravity: 2.68, liquid limit (LL): 38.3, plastic limit (PL): 26.41, plastic index (PI): 11.89, soil type: clay sand silt, test The following laboratory mechanical properties were obtained: friction angle (): 14.00°, cohesion (c): 0.018 kg/cm, and wet bulk weight (s): 1.97 gr/cc. For unconfined compression tests, shear strength (qu) is 0.009 kg/cm2, depth 5.00 m to 6.0 m is the average original water content of 24.0, specific gravity 2.62, Limit liquid (LL) 36.6, plastic limit (PL) 18.10, plastic index (PI) 18.50. The type of soil detected is clay sand silt, laboratory mechanical properties tests were achieved for shear angle (Ø): 12.12°, cohesion (c) is 0.014 kg/cm, and wet bulk weight (s) is 1.88 gr/cc. The dry bulk weight (d) is 1.52gr/cc, the unconfined compression test shear strength (qu) is 0.0071 kg/cm2, the depth is 13 m to 14 m, the original water content is an average of 27.05, the specific gravity is 2.71, the liquid limit (LL) is 29.0, the plastic limit (PL) is 12.80, and the plastic index (PI) is 16.20. The soil type detected was shale, clay sand, and laboratory mechanical properties tests revealed shear angle (): 21.59°, cohesiveness (c): 0.025 kg/cm, and wet bulk weight (s): 2.09 gr/cc. The dry weight (d) is 1.64 gr/cc, and the shear strength of the free compression test (qu) is 0.0127 kg/cm2.

ANALISIS SISTEM JARINGAN AIR BERSIH PERUMDAM TIRTA SENENTANG PADA UNIT TANJUNG PURI KABUPATEN SINTANG

Apri Ananda Putra, Stefanus Barlian Soeryamassoeka, Henny Herawati — Tue, 31 Oct 2023 00:00:00 +0000

The requirement for clean water in Sintang Regime, particularly served by Perumdam Tirta Senentang Tanjung Puri unit, is expanding step by step alongside the rising populace. The motivation behind this study is to get the aggregate sum of water request served and get the consequences of the dispersion network condition examination until 2037. To decide the accessibility of Kapuas Stream water, the False technique and dissemination network reenactment investigation utilizing the Epanet 2.2 program were utilized. How much pinnacle hour water interest in 2022 is 29,31 liters/second and in 2037 is 56,09 liters/second. Examination of the circulated water request network in existing circumstances in 2022 there is a speed that has not met the prerequisites with the least worth of 0,06 m/second and the most elevated worth of 0,88 m/second. Besides, an extra release was completed in 2037 circumstances, it was found that few lines didn't meet the prerequisites, in particular the least headloss unit worth of 0,21 m/km and the most noteworthy of 15,44 m/km, while the least speed esteem was 0,11 m/second and the most elevated was 1,69 m/second. In the wake of supplanting the line distance across in 2037, pressure results and headloss units that meet the prerequisites are acquired. Nonetheless, there are a few lines with speed esteems that don't meet the prerequisites, the least worth is 0,11 m/second and the most noteworthy worth is 0,95 m/second. This shows that the state of the spotless water circulation organization can in any case be grown so that administrations can be more ideal.

Keywords: Clean Water Network Distribution; Epanet 2.2; the need for clean water; mock method; Perumdam Tirta Senentang; Kapuas River

ALTERNATIF PERENCANAAN STRUKTUR GEDUNG HOTEL ASHER BALI TRANSIT KUTA MENGGUNAKAN DINDING GESER

Krisna Dwipa Yana, Ni Komang Ayu Agustini, Putu Aryastana — Tue, 31 Oct 2023 00:00:00 +0000

The highest building design was require the deviation due to lateral forces is very important in the planning of tall building structures. To reduce the amount of deviation in the structure can be done by adding special structural elements, such as shear walls. The application of shear walls impact the stiffness of the building structure will increase and decrease the floor deviation. The Asher Bali Transit Hotel building which is located in South Kuta District, Badung regency, Bali. This building has a height of 15 m consisting of 4 floors. Planning is carried out with 2 models are existing model and dual system model. All load inputs, material specifications and structural dimensions are the same and differ only in the addition of shear walls to the building. Based on the results of the analysis of the two models, the largest floor deviation value in existing model is X = 38.968 mm; Y=32.808 mm and for dual system model it is X=11.534 mm; Y=24,717. Based on the results of this analysis it can be seen that with the addition of shear walls there was a decrease in displacement of 81.24% for the X direction and 15.54% for the Y direction. From the results of the analysis of structural reinforcement it can be concluded that there was a decrease in the use of reinforcement due to the addition of shear walls in the direction x. The most significant decrease occurred in K1 column reinforcement from 12 D19 to 12 D16, beam B1 for support area from 5 D19 to 6 D16 and for field area from 4 D19 to 4 D16. From the results of this planning can be used as a consideration in the construction of the next building for the use of shear walls in the structure.

RUMUSAN STRATEGI PENGEMBANGAN PERUMDA AIR MINUM TIRTA SENENTANG BERDASARKAN HASIL EVALUASI KINERJA

Elsy Ivana Clara Ivana, Stefanus Barlian Soeryamassoeka, Herawati Henny — Tue, 31 Oct 2023 00:00:00 +0000

Water is part of our daily life needs. To meet the need for clean water in Sintang Regency, PERUMDA Tirta
Senentang Drinking Water uses 4 water sources, namely from the Kapuas River, Melawi River, Ketungau River,
Kayan River with a total capacity of 295 lt/sec. This research aims to find and formulate strategies in efforts to
develop the performance of PERUMDA Air Minum Tirta Senentang as a clean water supply agency based on the
results of performance evaluations. The analytical method used in this research is performance evaluation analysis
using the Balanced Scorecard method by paying attention to four aspects, namely financial aspects, service aspects,
operational aspects and human resource aspects. And for analysis of the formulation of strategies in efforts to
develop performance using SWOT analysis. Based on the performance evaluation, the results obtained from a series
of SWOT analyzes are the strategy formulation that best suits the performance development efforts of PERUMDA
Air Minum Tirta Senentang, namely by optimizing Strengths so that existing opportunities can be maximized so that
six strategy formulations are obtained for strengthening and implementing regulations in the development of
PERUMDA Water Drink Tirta Senentang. From the results of the QSPM analysis, an alternative strategy with the
best policy was obtained, accompanied by determining the time period, a short-term strategy was obtained, namely
increasing service coverage, production capacity and service blocks. The medium term strategy is to optimize the
home connection network and idle capacity. And the long-term strategy is to collaborate with competent parties.
Keywords: SWOT analysis ; Performance evaluation ; Tirta Senentang Drinking Water Municipal Corporation.

STUDI KASUS PERENCANAAN KOMBINASI SISTEM PRACETAK DENGAN ISOLASI DASAR PADA APARTEMEN PANCORAN RIVERSIDE II

Martinus Nifotuho Fau, Hari Nugraha Nurjaman — Tue, 31 Oct 2023 00:00:00 +0000

The development and application of high-performance precast systems with prescriptive planning concepts and regimes, it is fully produced locally in Indonesia. However, precast systems that use base isolation, especially in high-rise buildings, need a deeper study to determine the overall behavior and performance of the building. The purpose of this study is to plan a structure that uses a combination of precast and base isolation systems with a case study of a high-rise building, namely the Pancoran Riverside II Apartment, which is located in Jakarta and consists of a tower area of 32 floors and a podium area of 6 floors. The use of base isolation can also shift the period of the structure to be larger, so that a smaller base shear can be obtained, but because the tower area of this building is quite high (121.6 m), the period of the structure is large enough so that the effect of shifting the period of the structure is not very effective in the area. tower, while the podium area (19.2 m) can still take advantage of this decrease in base shear.

THE EFFECTIVENESS OF STRUCTURAL SYSTEMS MERU IN MITIGATING EARTHQUAKE IMPACTS

Tue, 31 Oct 2023 00:00:00 +0000

Studi ini menganalisis sifat tahan gempa Meru, pagoda bertingkat di Bali, yang selama ini tetap utuh meskipun lapisan atasnya berbahan kayu dan lapisan dasarnya dilapisi dinding bata. Penelitian ini meliputi bentuk arsitektur, sistem struktur, bahan bangunan, respons dinamis, dan dampak beban angin terhadap Meru dalam menghadapi aktivitas seismik. Dengan menggunakan model Elemen Hingga 2-D dan analisis dinamika sejarah waktu non linier, Meru tingkat sebelas di Kawasan Pura Ulun Danu Batur Kintamani, Bali, dipelajari dalam konteks ketahanan gempa dan pengaruh beban angin. Studi ini mengungkap bahwa Meru mampu menghadapi gempa maksimum dengan tingkat kepercayaan untuk periode ulang 2500 tahun, sambil mengidentifikasi periode alami dan mode getar struktur. Dengan mempertimbangkan pula pengaruh beban angin, penelitian ini memberikan wawasan awal mengenai perilaku Meru dalam situasi gempa dan kondisi lingkungan yang lebih luas. Penelitian selanjutnya dapat melibatkan eksperimen untuk mengonfirmasi temuan ini, termasuk analisis komponen individu dan struktur secara keseluruhan.

FAKTOR-FAKTOR PEMILIHAN PEMASOK MATERIAL BANGUNAN

Fuk Jin Oei, Sudarno P Tampubolon, Dady Supriadi, Iwan B. Santoso — Tue, 31 Oct 2023 00:00:00 +0000

Selection materials suppliers selectively are important things to be done by the contractor because it can save the cost of the project given the fact that more than half of project expenditure is for the material so we need the right management in the procurement of materials. In this study explains the factors to be considered contractor in choosing the material supplier. There are four main factors to be considered in the selection of contractors, namely material supplier quality, delivery, service, and cost which is then translated into 19 sub-variables. By using multiple linear regression obtained 3 factors that influence the decision of the contractor to buy material that is the amount of material being sent, delayed payment, and the accuracy of the information given price.