206 research outputs found
Analisis Kelongsoran Lereng Timbunan Dan Efektivitas Perkuatan Dengan Full Displacement Column Pada Tanah Lunak Studi Kasus : Pembangunan Jalan Tol Ruas Padang Sicincin Sta 7+400 – 7+550
No full textPaket yang sedang dalam tahap proses konstruksi pada ruas jaringan jalan tol Trans Sumatera salah satunya adalah seksi Padang – Lubuk Alung – Sicincin yang ditargetkan selesai pada Juli 2024. Salah satu kendala dalam proses pekerjaan yaitu terdapat kelongsoran timbunan pada STA 7+450 yang terindikasi akibat adanya penurunan pada tanah dasar. Hal ini mengakibatkan proses konstruksi tidak bisa berlanjut sehingga terjadi keterlambatan dalam progress pelaksanaan konstruksi. Oleh karena itu dibutuhkanlah suatu kajian yang berfokus pada analisis penyebab kelongsoran dan rekomendasi tindaklanjut untuk mengatasi permasalahan pada pekerjaan timbunan STA 7+450 pada proyek Pembangunan Jalan Tol Ruas Padang – Pekanbaru seksi Padang – Lubuk Alung – Sicincin. Metode yang digunakan dalam penelitian ini adalah menggunakan analisis permodelan elemen hingga dengan melihat nilai Safety Factor lereng timbunan pada analisis balik. Kelongsoran hasil permodelan dengan metode elemen hingga ini juga dibandingkan dengan garis kelongsoran yang terjadi di lapangan. Dari back analysis diperoleh paramater baru ketika kelongsoran terjadi sebagai input dalam analisis perkuatan. Untuk tindak lanjut perbaikan, diusulkan perkuatan menggunakan full displacement column dimana akan dianalisis variasi pengaruh jarak pemasangan kolom FDC, tebal, dan kombinasi material load transfer platform terhadap kestabilan lereng, penurunan, dan arching effect. Diperoleh bahwa struktur timbunan sebelum kelongsoran memiliki nilai SF yang kritis yaitu SF = 1.019. Kelongsoran terjadi akibat dari material timbunan yang digunakan kurang baik dan didominasi material berpasir (C mendekati 0). Selain itu, terdapat juga tanah lunak yang masih belum stabil pada permukaan setebal 0.5 m. Diperoleh perubahan parameter berupa c’ = 5.06 kN/m2 dan Ø’ =6.32o, cc = 0.8175 dan cs =0.1204 pada tanah lunak lapisan teratas yang merupakan penyebab kelongsoran. Dari hasil permodelan untuk mencari efektivitas perkuatan dengan FDC diperoleh parameter optimum dengan acuan jarak 3 kali diameter kolom, dan tebal Load Transfer Platform 1.2 meter dengan perkuatan geotekstile ataupun geogrid. Dari hasil analisis, perkuatan menggunakan FDC pada tanah lunakn ini efektif terhadap beban vertikal seperti beban lalu lintas akan tetapi kurang efektif untuk mengakomodir beban gampa pseudostatic.
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The package that is currently under construction on the Trans Sumatra toll road network section Padang - Pekanbaru is the Padang - Lubuk Alung - Sicincin section which is targeted for completion in July 2024. One of the obstacles in the work process is that there is an embankment landslide at STA 7 + 450 which is indicated due to a decrease in the subgrade. This resulted in the construction process not being able to continue so there was a delay in the progress of construction implementation. Therefore, a study is needed that focuses on analyzing the causes of landslides and follow-up recommendations to overcome problems in the STA 7 + 450 embankment work on the Padang - Pekanbaru Toll Road Construction project section Padang - Lubuk Alung - Sicincin. The method of this research is to use finite element modeling analysis by looking at the Safety Factor value of the embankment slope in the back analysis. The landslide modeling results with the finite element method are also compared with the landslide lines that occur in the field. From the back analysis, new parameters are obtained when the landslide occurs as input in the reinforcement analysis. For corrective reinforcement, a full displacement column is proposed where the effect of FDC column spacing, thickness, and load transfer platform material combination on slope stability, settlement, and arching effect will be analyzed. It was found that the embankment structure before the collapse had a critical SF value of SF = 1.019. The landslide occurred as a result of the embankment material used was poor and dominated by sandy material (C close to 0). In addition, there is also soft soil that is still unstable on the surface of 0.5 m thick. Parameter changes were obtained in the form of c' = 5.06 kN/m2 and Ø' =6.32o, cc = 0.8175 and cs =0.1204 in the top layer of soft soil which was indicated to be the cause of the landslide. From the modeling results to find the effectiveness of reinforcement with FDC, the optimum parameters were obtained with reference to a distance of 3 times the diameter of the column, and a Load Transfer Platform thickness of 1.2 meters with geotextile or geogrid reinforcement. From the analysis, reinforcement using FDC on soft soil is effective against vertical loads such as traffic loads but less effective to handle pseudostatic earthquake loads
Perancangan Kesesuaian Kelandaian Holding Position dan Exit Taxiway Terhadap Kemungkinan Terjadinya Sliding dan Bertambahnya Konsumsi Bahan Bakar Pesawat
Get PDFSalah satu hal yang menjadi fokus dalam perencanaan suatu bandara adalah perencanaan fasilitas sisi udara. Sering kali dalam perencanaan fasilitas sisi udara dijumpai masalah sulitnya dilakukan perencanaan akibat adanya kondisi topografi yang mempengaruhi perencanaan fasilitas sisi udara. Kemungkinan yang ada adalah adanya perbedaan tinggi antara apron dan runway. Aturan kemiringan secara longitudinal sudah diatur pada dokumen ICAO maupun FAA, akan tetapi untuk perbedaan tinggi antara apron dan runway belum ditetapkan, artinya akan ada kemiringan pada exit taxiway dan holding position. Kondisi ini mengharuskan dilakukan rekayasa pada bagian taxiway dengan tetap mempertimbangkan tingkat keselamatan. Untuk itu dibutuhkanlah perancangan kemiringan Holding taxiway agar posisi pesawat yang sedang Holding sebelum memasuki Runway tidak tergelincir dan memasuki Runway.
Di sisi lain perlu dipertimbangkan nilai avtur yang harus bertambah apabila pesawat keluar runway menuju apron karena ada perubahan elevasi. Perancangan kemiringan exit taxiway ini dilakukan dengan menganalisa distribusi beban pesawat ke roda yang kemudian disimulasikan dalam suatu bidang miring dengan persentase kemiringan tertentu hingga didapatkan kemiringan yang paling sesuai. Diasumsikan kekesatan permukaan perkerasan adalah mengikuti perkerasan baru. Simulasi yang dilakukan adalah terhadap semua tipe pesawat. Diharapkan diperoleh kemiringan yang aman dan penggunaan bahan bakar yang minimal untuk beda tinggi per satuan meter.
Dari hasil analisa, diperoleh kemiringan Holding Position yang paling kritis adalah 18°. Dengan kata lain, apabila desain kemiringan akibat perbedaan tinggi antara apron dan runway sama dengan atau dibawah 18° maka aman terhadap sliding. Maka untuk perancangan gradien holding position dapat mengikuti peraturan gradien memanjang taxiway. Untuk kemiringan 2 derajat, semua tipe pesawat sudah mampu mencapai batas kecepatan pesawat dalam keadaan taxiing yaitu 10-20 knot. Untuk itu dalam perancangan exit taxiway, gradien maximum yang dapat digunakan agar semua pesawat dapat berjalan adalah 2 derajat. Dalam perancangan exit taxiway, gradien sangat berpengaruh besar terhadap biaya operasional akibat dari pertambahan konsumsi bahan bakar dari pesawat. Misalnya saja untuk gradien 2° pesawat Boeing 737-900ER, pertambahan biaya operasional pesawat dapat mencapai angka Rp 197.548,- untuk melewati exit taxiway. Sedangkan untuk pesawat besar seperti Boeing 747-8 pertambahan biaya operasional mencapai angka Rp 736.709,-.
========================================================================================One of the things that became the focus in planning an airport was the planning of air side facilities. Often in air side facility planning it is difficult to do planning due to topography conditions that affect air side facility planning. The possibility exists that there is a high difference between apron and runway. Longitudinal slope rules are set in both ICAO and FAA documents, but for the height difference between apron and runway has not been established, it means there will be a slope on the exit taxiway and holding position. This condition requires engineering on the taxiway section while maintaining safety levels. Therefore it is necessary to design the slope of Holding taxiway so that the position of the aircraft being Holding before entering Runway does not slip and enter Runway.
On the other hand it is necessary to consider the aviation value that must increase if the plane runs out of the runway towards the apron due to an elevation change. The design of the exit taxiway slope is done by analyzing the distribution of aircraft loads to the wheels which are then simulated in a sloping plane with a certain percentage of slope to obtain the most appropriate slope. It is assumed that the pavement surface agitation is following a new pavement. The simulation is carried out on all types of aircraft. It is expected to obtain a safe slope and minimum fuel usage for a height difference on meter unit.
From the analysis results, the most critical holding position of the Holding Position to be used is 18 °. In other words, if the slope design due to the high difference between apron and runway is equal to or below 18 ° then it is safe against sliding. So, for holding position gradient design can follow the regulation of gradient lengthwise taxiway. For a 2° slope, all types of aircraft have been able to reach the aircraft speed limit in the taxiing state of 10-20 knots. For that in the design of exit taxiways, the maximum gradient can be used for all aircraft can run is 2°. In the exit taxiway design, the gradient is very influential to the operational cost cause increases air fuel consumption of the aircraft. For example, for a 2° gradient Boeing 737-900ER aircraft, the increase of aircraft operating costs can reach Rp 197,548, - to pass the exit taxiway. And for large aircraft such as Boeing 747-8 increases operational cost reaches Rp 736,709, -
Prosiding - Hazbi, Fachri, Firman (Teknoka 8)
Get PDFPT Unibless Indo Multi is engaged in IT Services, IT Trading, and IT Outsourcing. In this paper focuses on IT Trading, which includes the sale and rental of IT hardware, the provision of office equipment, the provision of shelves and archival support equipment and others. The author finds problems that occur specifically in the inventory of goods in processing inventory data still using simple applications, which causes the company's performance to be less than optimal. The author aims to solve existing problems by designing and building an inventory data management system using visual basic with the waterfall method, Unified Modeling Language (UML), Balsamiq Mockup and using a Microsoft Access database. Based on the test results using blackbox testing, the system runs as expected. After testing, 92.5 out of 7 respondents agreed that the system is easy to understand and use
SOSIOTEKNOLOGI Kearifan Lokal: Komoditas Era Revolusi Industri 5.0
Get PDFBook Title : SOSIOTEKNOLOGI Kearifan Lokal: Komoditas Era Revolusi Industri 5.0
Author Names : Dicky R. Munaf dan Susanto
Year of Publication : 2021
Publisher : ITB Press, Gedung Perpustakaan Pusat ITB, Jl. Ganesa No. 10 Bandung 40132, Jawa Barat
Number of pages : 293 pages
ISBN Number : 978-623-297-131-8
Book review by : Muhamad Firman Al-Faha
A survey design for integrated monitoring of salmonids
Get PDFThe Oregon Department of Fish and Wildlife conducts three large-scale projects to monitor coastal salmonids. The Coastal Salmonid Inventory Project conducts spawning surveys for returning adults, the Early Life History Project monitors juvenile salmonids, and the Aquatic Inventory Project monitors stream habitat. In 1998, an integrated monitoring design was initiated to facilitate the integration of data among these projects. A rotating panel design utilizing the Environmental Protection Agency's Environmental Monitoring and Assessment Program (EMAP) site selection process was deemed to be the best approach to meet the needs of the studies. EMAP utilizes a Geographic Information System (GIS) to draw a spatially balanced sample of a population. The program provides forced overlap between projects where their sampling domains overlap, and facilitates sampling intensification. The rotating panel design balances the utility of trend detection through repeated sampling at the same sites over time, with the advantages of extensive sampling of the target populations. Arc Info was used to create coverages of the population of streams to be sampled for each project. EMAP selects a spatially balanced sample from a coverage, forces overlap of sites for each project where their sampling extents coincide, associates each point with a stream reach, and measures the distance upstream from the reach origin. This plan was successfully implemented during the 1998 field season.Julie C. Firman and Steven E. Jacobs.This archived document is maintained by the State Library of Oregon as part of the Oregon Documents Depository Program. It is for informational purposes and may not be suitable for legal purposes.Includes bibliographical references (pages 7-9).Mode of access: Internet from the Oregon Government Publications Collection.Text in English
Faktor – Faktor Pendukung Keberhasilan Penerapan Peraturan Pemerintah No.24 Tahun 2005 pada Pemerintahan Kabupaten Labuhan Batu
No full textThe purpose of this research is to (a) get a clear view about the effect of
human resource, commitment and the supporting devices, (b) calculate the effect
of human resource, commitment and the supporting devices to the success of
implementation of Government Regulation No.24 year 2005, (c) give some advice
which may assist the Regency Government in solving its problems especially the
discussed problem, that is the success of implementation of Government
Regulation No.24 year 2005 which is affected by the human resource and the
supporting devices.
In this research, the author use associative causal research design.
Sampling method used by the author is simple random sampling. Data types used
are primary and secondary data, while the data collecting technique is
documentary and survey, and the data processing is done with supporting tools for
SPSS program . Classic Assumption Testing used by the author including
normality test, multicolinearity test, and heteroskedasticity test. While the
research model used by the author is Multiple Regresion statistic analysis, and the
hypothesis testing are done with simultan significance test, partial significance
test, dan determinant coefficient.
The result of this research show that (a) Human resources, commitment
and the supporting devices describe the success of implementation of Government
Regulation is 36,5%, (b) Human resources, Commitment and the supporting
devices influence simultaneously to implementation of Government regulation
No.24 year 2005, (c) Partially, Human resources and the supporting devices
influence positively but not significantly toward implementation’s success of
Government Regulation No.24 year 2005.103 HalamanSkripsi Sarjan
Faktor – Faktor Pendukung Keberhasilan Penerapan Peraturan Pemerintah No.24 Tahun 2005 pada Pemerintahan Kabupaten Labuhan Batu
No full textThe purpose of this research is to (a) get a clear view about the effect of
human resource, commitment and the supporting devices, (b) calculate the effect
of human resource, commitment and the supporting devices to the success of
implementation of Government Regulation No.24 year 2005, (c) give some advice
which may assist the Regency Government in solving its problems especially the
discussed problem, that is the success of implementation of Government
Regulation No.24 year 2005 which is affected by the human resource and the
supporting devices.
In this research, the author use associative causal research design.
Sampling method used by the author is simple random sampling. Data types used
are primary and secondary data, while the data collecting technique is
documentary and survey, and the data processing is done with supporting tools for
SPSS program . Classic Assumption Testing used by the author including
normality test, multicolinearity test, and heteroskedasticity test. While the
research model used by the author is Multiple Regresion statistic analysis, and the
hypothesis testing are done with simultan significance test, partial significance
test, dan determinant coefficient.
The result of this research show that (a) Human resources, commitment
and the supporting devices describe the success of implementation of Government
Regulation is 36,5%, (b) Human resources, Commitment and the supporting
devices influence simultaneously to implementation of Government regulation
No.24 year 2005, (c) Partially, Human resources and the supporting devices
influence positively but not significantly toward implementation’s success of
Government Regulation No.24 year 2005.103 HalamanSkripsi Sarjan
The Effect of Caffeine on Performance
Get PDFThe purpose of this study was to investigate the effects of caffeine on reaction time, as measured by PEBL2 software. To test this relationship, participants were measured across three tests within the PEBL2 software, with one group of participants receiving a 300 mL dose of caffeinated coffee before testing, and another receiving a 300 mL dose of a decaffeinated coffee. It was hypothesized that the participants who received a dose of caffeinated coffee would perform better and thus have faster reaction times than those who received the decaffeinated control. The results did not support the hypothesis: the mean response time was the same across the caffeinated and decaffeinated conditions. The results of this study are discussed in relation to other findings on the effects of caffeine on performance, specifically the relationship between caffeine and reaction time
The Winston Readers: Third Reader Manual.
No full textA pamphlet for use with the reader published in the same year. Unfortunately, I do not yet have the latter! Plenty of exercises, questions, and word-lists. The fable material is on 10-11, 13, 16, 19-20. The only illustrations here are on the cover and title page.Sidney G. Firman and Ethel H. Maltb
Validation of science virtual test to assess 8th grade students’ critical thinking on living things and environmental sustainability theme
No full text- …
