Jurnal Rekayasa Sipil dan Desain
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Kajian Perbaikan Tanah Dasar dan Proteksi Lereng pada Rencana Jalur Ganda Kereta Api Antara Giham-Martapura
Get PDFThe train is a means of transportation favored by the community because the train is one of the modes of transportation that has special characteristics and advantages. Along with the development of infrastructure development in Lampung Province and South Sumatra Province, the planning and design of a building must be done carefully and well, one of them is by building a double track between Giham - Martapura, South Sumatra because the application of one track has many obstacles. It is hoped that the addition of the double track can make the train schedule more timely and can improve the quality of the trip. Based on the results of the Atterberg boundary test the soil originating from the undisturbed soil sample of the Giham-Martapura railroad gets an PI value <LL-30 (26.51% <27.95%), then the land based on the AASHTO system is classified into A -7-5 that is clay soil and as subgrade material has normal to poor evaluation. Keywords: railroad, land, double track, slope protection
Analisis Struktur Bangunan Bawah Jembatan Kereta Api Way Pengubuan
Get PDFJembatan merupakan salah satu konstruksi yang berguna untuk melancarkan proses pengiriman batu bara yang diangkut oleh KA Babaranjang. Tujuan dari penelitian ini adalah merencanakan struktur bawah jembatan kereta api dan mengetahui tingkat keamanan berdasarkan beban dari aksi tetap, aksi lingkungan, beban lalu lintas, dan aksi lainnya. Berdasarkan penelitian analisis struktur bawah didapatkan dimensi abutment dengan tinggi 7,67 m dan panjang 6 m. Dengan dimensi abutment tersebut diperoleh angka aman untuk kontrol stabilitas guling arah x sebesar 2,5825 dan arah y sebesar 28,9128, dengan batas aman stabilitas guling sebesar 2,5. Kontrol stabilitas geser arah x sebesar 1,1003 dan arah y sebesar 1,9991, dengan batas aman stabilitas geser sebesar 1,1. Dimensi pile cap digunakan tebal 1,5 m, lebar 8,8 m, dan panjang 6 m. Pondasi yang digunakan adalah pondasi tipe bored pile dengan diameter sebesar 1 m dan kedalaman sebesar 6 m. Jumlah pondasi yang dipakai 12 buah dengan susunan 3 x 4. Dan diperoleh daya dukung aksial maksimum sebesar 1979,497 kN serta daya dukung aksial izin sebesar 3072,403 kN. Kata Kunci : Struktur Bawah Jembatan, Abument, Pile Cap, Bored Pil
Effect of Delay due to U-Turn on Pangeran Antasari Road (Case Study U-Turn Near Ganesha Operation)
No full textPangeran Antasari road is an urban road with 2-ways 4-lanes type (using median). In this median was found U-turn facility near of Ganesha Operation. Based on preliminary observations at the study location (Pangeran Antasari Road), it was seen there vehicles that could’t make a smooth U-Turn movement and other vehicles that were obstructed when passing through this facility, especially during peak hours when traffic volume was high.The objevtives of this study is to know the effect of U-Turn on delays in Pangeran Antasari road, which is near of Ganesha Operation. The method used is Gap Acceptance. It was to determine the value of vehicle travel time that is affected by U-Turn movement vehicles, namely the gap time and follow-up time.Based on the data analysis carried out at the U-Turn near of Ganesha Operation, it can be concluded that the effect of delay is due to the average time of gap accepted and follow-up time. The average time value of gap accepted was 3.64 seconds and 4.35 seconds in the morning and 9.59 seconds and 8.78 seconds in the afternoon. The average follow-up time of the vehicle is 12.72 seconds to 18.2 seconds in the morning and 14.01 seconds to 17.87 seconds in the afternoon
Analysis of River Sediment Transport Way Sekampung (Upstream of Batutegi Dam) Using an Empirical Approach and HEC-RAS Modeling
No full textDams have various functions and benefits, such as irrigation sources, flood control, power generation, tourism etc. The problem that is concerned about the dams that have been built in developing countries such as Indonesia is in particular the problem of sedimentation in the reservoir. Way Sekampung is one of the rivers which is the source of water in the Batutegi reservoir. Way Sekampung has a large discharge. However, Way Sekampung which has a fairly heavy flow also carries sediment which must be taken into account so as not to disturb the stability of the existing river. Therefore, a research was conducted on sediment discharge and transport in the Way Sekampung river. The discharge analysis used field current meter data and sediment analysis used field sediment samples. Comparative data is calculated using the HEC-RAS application so that there are variations in the discharge in the calculation. The Way Sekampung River produces a sediment discharge of 0.0814 m3 / s at Cross Section 1 and 0.0999 m3 / s in Cross Section 2 using the Meyer Peter and Muller method. Compared with empirical calculations, the sediment rate value is 0.0822 m3 / s in Cross Section 1 and 0.0798 m3 / s in Cross Section 2 using HEC-RAS discharge modeling and Einstein method
Analisis Pemodelan Numerik Redaman Breakwater Tenggelam Tipe Berlubang dan Tidak Berlubang Menggunakan Sigerd
Get PDFContinuous waves crashing into the coastal area can cause abrasion on the coast and damage facilities and settlements in the area. Therefore, a coastal protection building is needed to reduce wave energy before arriving at the beach such as a breakwater. To design a breakwater it is necessary to pay attention to wave deformation, one of which is wave diffraction. Where the wave when obstructed by an obstacle will bend around the end of the obstacle and enter the protected area behind it. The complex phenomena of nature are described in terms of equations, but they are difficult to solve analytically. So in this study solved numerically with the help of a computer with 2D wave simulation software based on the principle of the hyperbolic equation propagation model. Then get the results in the form of diffraction coefficient values that are close to the results obtained in the physical model research that has been carried out. Changes in wave height occur after passing through the breakwater which indicates a change in energy from before and after passing through the breakwater
Analisis Dampak Terminal Bayangan Terhadap Kinerja Lalu Lintas di Bundaran Tugu Radin Intan Rajabasa Ruas Jalan Soekarno Hatta - Natar
Get PDFThe impact of the shadow terminal has caused the congestion and the unrest for road users. This is due to side obstructions caused by pedestrians, buses, cars, and other transportation waiting and picking up passengers around the road, resulting in buildup around the shadow terminal. As a result of the accumulation around the shadow terminal, it caused traffic jams on the Soekarno Hatta - Natar road. In connection with the above problems, it is necessary to study the impact of the shadow terminal on the Soekarno Hatta - Natar road section which can then be compared with the performance of the Soekarno Hatta - Natar road in the absence of a shadow terminal, in order to find out how much traffic performance changes on Soekarno Hatta road - Natar due to the shadow terminal. Thus, this study aims to determine the performance of the Soekarno Hatta - Natar road when there is a shadow terminal and when there is no shadow terminal. The results of this study indicate that there is a change in the value of the side friction in the condition of the shadow terminal on Monday with an event weight of 314 events with a side drag in the absence of a shadow terminal of 213 events. The difference in the value of the side friction will result in a decrease in the value of road capacity, degree of saturation and level of road services. Key words : Road Performance, Side Obstructions, Degree of Saturation, Capacity, Level of Service
Potensi dan Nilai Indeks Kerawanan Bencana Alam di Kabupaten Lampung Selatan
Get PDFPemetaan risiko bencana gempa bumi, banjir dan tsunami disusun dengan mengklasifikasikan tingkat ancaman, kerentanan dan kapasitas dalam menghadapi bencana menggunakan Sistem Informasi Geografis (SIG). Parameter pemetaan ancaman gempa bumi didasarkan dari kepadatan penduduk dan letak sesar atau patahan. Pemetaan ancaman banjir menggunakan parameter daerah aliran sungai dan data kejadian bencana. Sedangkan ancaman bencana tsunami menggunakan beberapa parameter yaitu, jarak dari pusat gempa, kelerengan topografi, jarak dari sungai, keterlindungn lahan, morfologi garis pantai dan keberadaan pulau penghalang. Penentuan parameter, klasifikasi dan pembobotan indeks kerentanan dan kapasitas mengacu pada Peraturan Kepala Badan Nasional Penanggulangan Bencana No. 2 Tahun 2012. Kabupaten Lampung Selatan tidak memiliki risiko tinggi terhadap bencana gempa bumi, Kecamatan yang memiliki tingkat risiko tinggi terhadap bencana banjir adalah Way Sulan, Candiuro, Katibung, Sidomulyo, Palas dan Sragi. Sedangkan Kecamatan yang memiliki risiko tinggi terhada bencana tsunami adalah Katibung, Sidomulyo, Kalianda, Rajabasa, Bakauheni, Ketapang dan Sragi
Analisis Struktur Gedung Bertingkat Rendah Akibat Pengaruh Beban Gempa Dengan Metode Riwayat Waktu
Get PDFBangunan bertingkat merupakan bangunan yang rentan apabila terjadi gempa bumi dan berpotensi menimbulkan korban jiwa. Pergerakan tanah akibat terjadinya gempa bumi dapat menimbulkan getaran dan deformasi yang dapat merusak struktur bangunan. Analisis serta evaluasi perlu dilakukan untuk meminimalisir kejadian yang tidak diinginkan. Penelitian ini bertujuan untuk menganalisis struktur dalam memenuhi persyaratan keamanan berdasarkan SNI 1726:2019 dengan tinjauan simpangan antar tingkat dan ATC-40 yang ditinjau berdasarkan maximum total drift. Analisis struktur yang dilakukan menggunakan metode riwayat waktu dengan bantuan software SAP2000. Model gedung dianalisis dengan menggunakan 5 (lima) akselerogram gempa masukan. Percepatan akselerogram yang digunakan sebagai gempa masukan perlu diskalakan terlebih dahulu terhadap taraf gempa rencana sesuai objek penelitian. Dari hasil penelitian ini, didapatkan bahwa akibat pengaruh gempa masukan Imperial Valley, Kobe, Kocaeli, Northridge, dan San Fernando, simpangan antar tingkat yang terjadi masih dalam kategori aman karena tidak melebihi simpangan antar tingkat izin yaitu 48,4615 mm. Gedung termasuk dalam taraf kinerja Immediate Occupancy (IO) berdasarkan ATC-40, nilai maximum total drift berada dibawah batas 0,01
Evaluasi Stabilitas Breakwater pada Kecamatan Panjang
Get PDFAbstract The coast will be easily damaged due to large waves, causing damage to the area around the coastal area which is densely populated with various activities, namely Pantai Kecamatan Panjang, among others as ports, settlements, industry, trade, tourism and fishing activities. With so many activities, it should be accompanied by development that prioritizes conservation aspects to reduce the impact of environmental degradation. One of the efforts to overcome the impact of its degradation is to make a breakwater. This study aims to assess and study the failure of the protected layer unit at the breakwater on the coast of Kecamatan Panjang, so testing the stability of the protected layer using a physical model was carried out at the Hydraulics Laboratory of the University of Lampung using an experimental method. The results showed that the level of breakwater damage was 0% at 4,47 cm HHWL position with a plan wave height of 4 cm. So, the crushed rock will work well to protect the breakwater. Key words: Breakwater, Armor Units, Physical Model, Stabilit
Studi Akurasi Sensor Ultrasonik Tipe US-015 Untuk Pengukuran Pasang Surut Air Laut Daerah Bergelombang
Get PDFThe technology in observing tides has developed, with the discovery of sensors that can make observations of tides automatically. one of the sensors that can be used for tidal observation is an ultrasonic sensor that works based on the principle of ultrasonic waves. Natural phenomena that occur such as sea level waves can affect the accuracy of tidal readings using ultrasonic sensors. This study aims to design an ultrasonic sensor-based tide instrument that can reduce sea wave interference and calculate the accuracy of the reading results of the instrument. Data collection was observed per 1 second, then the data was divided into several intervals, that is 1 second, 5 minutes, 15 minutes and 30 minutes. The accuracy of the instrument is calculated based on the observed manual data per 30 minute interval, after that the data will be tested for correlation and significance between the variables of closed automatic instrument, automatic open instrument and manual observed. This study produces equipment for automatic tide measurement that can reduce waves with ultrasonic sensors. The results of testing the data from 3 observations obtained accuracy of the closed automatic instrument has better accuracy that is 99.1981%, 99.3007%, 99.3156%. Keywords: Tides, Ultrasonic sensor, Microcontroller, Arduino uno