Jurnal Rekayasa Sipil dan Desain
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Pengaruh Nilai Kohesi Tanah Terhadap Stabilitas Retaining Wall Pada Basement Gedung Bertingkat
Get PDFThis study aims to determine the stability of the retaining wall as a basement storey building in the city of Bandar Lampung. This study uses secondary data, ie, bor logs and SPT. Data on. laboratory test results are obtained from the geotehnical report.Based on the geotechnical data on the stability calculation and reinforcement retaining wall. High retaining wall is 3.25 meters with a thickness of 0.6 meters and a width 1meter (reviewed per meter). Calculation of the stability of retaining wall just reviewed against the danger of sliding and rolling hazard. As for reinforcing the retaining wall of concrete is based on ISO 2013.From the analysis, obtained the value of stability to the danger of sliding and rolling 4.8 ≥ 1.5 were declared safe retaining wall against the danger of sliding and rolling. The results of calculations on the retaining wall reinforcement, for the main reinforcement D16 - 250, shear D13 - 200, and reinforcement for D10-300. Amount of reinforcement based on the calculation is similar to the design of reinforcement used in the construction of this multi-storey building. Keywords: retaining wall, basement, shear stability and bolsters
PENGARUH WAKTU PEMERAMAN TERHADAP UJI KUAT TEKAN PAVING BLOCK DARI CAMPURAN TANAH, SEMEN DAN PASIR MENGGUNAKAN ALAT PENETRASI MODIFIKASI MODIFIKASI
Get PDFAbstractPaving blocks are compositions of building material constructed from a mixture of Portlandcement or other similar hydrolysis, water, and aggregate or without other additives which do notruduce the quality of the material. In this research, the process of making paving blocks using amodified penetration tool in oder to improve the paving blocks quality in accordance with SNI-03-0691-1996. The soil samples tested from Kota Baru, Lampung Selatan. The amount of mixturepaving blocks was 75% of soil, 10% of sand and 15% of cement. The variation of curing time were0 days. 7 days, 14 days and 28 days as well as with pre and post burning treatment on the pavingblocks samples. The result showed that the making of paving blocks using silt with additionalmaterial of cement and sand fulfill the requirement in SNI-03-0691-1996. The addition and thecuring done could improve the physical and mechanical properties of the soil. For thecompressive strength value of the paving blocks with or without burning treatment, the best resultis shown in addition of 75% soil, 10% of sand and 15% of cement with 14 days curing time whichfulfill the requirement in SNI-03-0691-1996. The result of water absorption value which wasbetween 20,7% - 24,2% did not meet the specification in SNI-03-0691, 1996 that is 3% - 10%.Keywords : paving block, silt, compressive strength, curing time, water absorption
Perencanaan Embung di PT. Perkebunan Nusantara 7 Unit Usaha Bunga Mayang, Kabupaten Lampung Utara
Get PDFDalam rangka peningkatan produktivitas kebun tebu di PT. Perkebunan Nusantara 7 Unit Usaha Bunga Mayang, Kabupaten Lampung Utara, dilakukan revitalisasi puluhan embung untuk memenuhi kebutuhan air irigasi tanaman tebu.Perhitungan – perhitungan yang dilakukan dalam perencananaan embung ini meliputi analisa kapasitas tampungan menggunakan lengkung kapasitas, perhitungan curah hujan rencana menggunakan metode Log Pearson Tipe III, debit rencana menggunakan metode Rasional, analisa spillway, analisa tubuh embung, serta analisa kestabilan tubuh embung terhadap longsor.Dari perhitungan yang telah dilakukan diperoleh kapasitas tampungan sebesar 37224,24 m3, curah hujan rencana periode ulang 25 tahun sebesar 121,2384 mm, debit rencana periode ulang 25 tahun sebesar 1,89 m3/detik, mercu spillway menggunakan mercu Ogee Tipe I dengan elevasi mercu pada +42,5 dan elevasi muka air banjir pada +42,70. Tubuh bendungan menggunakan urugan tanah dengan kemiringan hulu 1 : 3 dan hilir tubuh embung adalah 1 : 2,25, elevasi puncak berada pada +44,0 dan elevasi dasar berada pada + 36,0. Tinggi jagaan tubuh embung dipakai sebesar 1,50 meter. Tubuh embung dan spillway dinyatakan aman terhadap gaya – gaya yang terjadi. Kata kunci : Embung, perencanaan, irigasi, PTPN 7
Analisis Hidrologi Untuk Penentuan Debit Banjir Rancangan di Bendungan Way Besai
Get PDFAbstractResource which is often used for energy source is water as hydro power plant. One of hydro power plant in Lampung province is Way Besai Hydro Power Plant. Considering the importance of this hydro power plant for people, extreme things on the hydro power plant like flood, certainly not desirable. Hydrologic analysis required for get result that was flood design as action anticipation.This study was conducted in Way Besai watershed, Sumber Jaya, West of Lampung. The data required of this study are rainfall data from five stations, flow Way Besai data from 1986 to 2000, and daily rainfall data from two station.From frequency analysis, obtained design flood for the largest single data group return period of 2 years is return period 5 years 131,00 m3/s, return period 10 years 178,42 m3/s, return period 25 years 253,71 m3/s, return period 50 years 322,66 m3/s, return period 100 years 403,45 m3/s, and 499,81 m3/s for return period 200 years. From HEC-HMS, the flood design for return period 2 years sebesar 71,2 m3/s, return period 5 years 90,6 m3/s, return period 10 years 105,7 m3/s, return period 25 years 128,6 m3/s, return period 50 years 156,6 m3/s, return period 100 years 190,8 m3/s and 233,7 m3/s for return period 200 years. Based on calibration result used RMSE, obtained RMSE value is 3,12. Keywords: watershed, design flood, Way Besai, HEC-HM
Analisis Hidrologi Untuk Penentuan Debit Banjir Rancangan di Bendungan Way Besai
Get PDFAbstractResource which is often used for energy source is water as hydro power plant. One of hydro power plant in Lampung province is Way Besai Hydro Power Plant. Considering the importance of this hydro power plant for people, extreme things on the hydro power plant like flood, certainly not desirable. Hydrologic analysis required for get result that was flood design as action anticipation.This study was conducted in Way Besai watershed, Sumber Jaya, West of Lampung. The data required of this study are rainfall data from five stations, flow Way Besai data from 1986 to 2000, and daily rainfall data from two station.From frequency analysis, obtained design flood for the largest single data group return period of 2 years is return period 5 years 131,00 m3/s, return period 10 years 178,42 m3/s, return period 25 years 253,71 m3/s, return period 50 years 322,66 m3/s, return period 100 years 403,45 m3/s, and 499,81 m3/s for return period 200 years. From HEC-HMS, the flood design for return period 2 years sebesar 71,2 m3/s, return period 5 years 90,6 m3/s, return period 10 years 105,7 m3/s, return period 25 years 128,6 m3/s, return period 50 years 156,6 m3/s, return period 100 years 190,8 m3/s and 233,7 m3/s for return period 200 years. Based on calibration result used RMSE, obtained RMSE value is 3,12. Keywords: watershed, design flood, Way Besai, HEC-HM
Sediment Analysis in the Way Besai Hydroelectric Watershed Using the USLE Method (United Soil Loss Equation)
No full textWay Besai hydropower station is located in Way Besai river basin (watershed) with most watersheds surrounded by mountains that cause erosion resulting in sediment buildup. The purpose of this research is to know the degree of erosion hazard and to know the sediment by the Universal Soil Loss Equation (USLE) method in Way Besai Watershed. The location of this research was conducted at Way Besai Sub River Watershed, Tulang Bawang Watershed, West Lampung Regency with Way Petai as the control point. The data needed in this research is the limitation of Way Besai Watershed catchment, land use data and land type at Way Besai Watershed catchment area. From the result of sedimentation analysis with USLE method, it can be known that the erosion rate of Way Besai Watershed catchment area is 305.03 ton/ha/year which is classified as Class IV Hazard Erosion or heavy and sedimentation of Way Besai Watershed catchment area is 165.079,13 ton/year
Kebutuhan Material Jaringan jalan Provinsi di Provinsi Lampung Pada Wilayah 2 dan Wilayah 4
No full textLampung Province is a province that annually holds improvements and infrastructure development, especially in the field of roads. By the increase of the road construction, the more material needed to meet the development.This research was conducted to know the amount of material of provincial road network of Lampung province in budget year 2016 region 2 and region 4 and to get material requirement in next year.From the collection of this data, obtained the auction pattern of project implementation began in mid-year until the end of the year. And from result of calculation of material requirement of road construction project of Lampung province in 2016 got the dominant result to use Sand, Asphalt, Aggregate Coarse, and Cement. In fulfilling the material needs of the Lampung provincial road project in 2016 region 2 and region 4 is good enough, it is shown with its fulfillment of the provincial road works material in 2016. From the analysis of the calculation of provincial road material needs in 2016 can be used as a guide to face the material needs of the following year
Perencanaan Pintu Pelimpah Bendungan Margatiga Kabupaten Lampung Timur Provinsi Lampung
Get PDFAbstractSpillway has an important role for both operating rules as well as a safety structure, particularly during flood, of a dam. In Margatiga Dam, gated-spillways were designed in order to regulate discharge to downstream mainly for irrigation purpose. The Margatiga Dam, located in East Lampung Regency, is a rock fill type of dam with vertical core, formed from specific clay materials. The dam was designed to supply the Sragi’s irrigation area mostly located in East Lampung Regency, which has more than 80% of its citizen are farmers. The main objective of this research is to design gate leaf structure of the spillway, in the form of skin plates and beams that fulfill safety requirement of the structure. Design was performed for two conditions, which are during normal water level, and during the flood conditions. Based on those two conditions, the most extreme forces was selected as the basis of the structural design. The loads, which are used for design, consist of hydrostatic pressure, sediment pressure, dynamic pressure during the earthquake, and the hydrodynamic pressure. This research provide dimension of the gate leaf of the concerned spillway. Thickness of the steel plates is 13 mm, meanwhile the dimension of girder plates are 900x300 mm, 860x100 mm, and 900x150 mm, for the horizontal beams, vertical beams, and the edge of the beams respectively. Thickness of flense and web for all the beams are designed to be 13 mm and 5 mm respectively. Design of the gate provide maximum deflection of the beams for 10.06 mm and maximum deflection of the plates is 5.16 mm, which are considered to fulfill the safety requirement for the conditions during probable maximum discharge (QPMF).Keywords : spillway, gate leaf, QPMF, girder plat
Pemanfaatan Alat Tekan Penetrasi Modifikasi Paving Block Untuk Melihat Nilai Kuat Tekan Yang Dipengaruhi Oleh Waktu Perendaman Menggunakan Tanah, Semen, Dan Kapur
Get PDFSoil sample that used as base material in this study was taken from Belimbing Sari Village area, Sub Jabung, East Lampung. Based on the testing of soil physical's characteristics, USCS classified soil samples as organic soil with medium to high plasticity and belongs to the OH group. The mixed content which used in this study was 85% soil, 10% lime, and 5% cement with curing time for 14 days, then it was divided with combustion and without combustion treatment on the paving block sample and soaked for 4, 8, 12, and 16 days. The result of this study was to obtain the average value of pressed-value on a mixture of 85% soil + 10% lime + 5% cement after the largest burning treatment and soaked for 4 days at 11.7 MPa. Thus, in addition to the combustion, the duration of immersion also affects its pressed-value. The longer it had soaked, the smaller its pressed-value would be. Therefore, this pressed-value met the requirement of the paving blocks' SNI-03-0691-1996 that was qualified on the classification of quality D which had the average pressed-value of at least 10 MPa. In addition to the pressed-value, the water absorption rate which was 15.5% -20.32% did not meet the paving blocks' requirement of SNI-03-0691-1996.Key words : Paving block, organic clay soil, compressive strength, water absorption, immersion
Studi Eksperimental Pengujian Kuat Tekan, Kuat Tarik Belah dan Kuat Lentur pada Campuran Beton dengan Penambahan Serat Kawat Bendrat Berkait
Get PDFAbstrak Beton adalah bahan konstruksi yang paling banyak digunakan untuk bangunan sipil dikarenakan memiliki beberapa kelebihan. Kelemahan pada struktur beton yaitu mempunyai kuat tarik yang rendah dan bersifat getas (brittle) sehingga beton diberi tulangan baja sebagai bahan alternatifnya. Pada penelitian ini, campuran beton diberi bahan tambah serat bendrat berkait. Penambahan ini dilakukan untuk mengetahui pengaruh serat bendrat berkait terhadap kuat tekan, tarik belah dan kuat lentur pada beton mutu normal dengan variasi kadar serat 0%, 0,75%, 1,0% dan 1,25% dengan panjang serat 60 mm dan diameter 1 mm. Benda uji kuat tekan dan tarik belah berupa silinder dengan diameter 15 cm dan tinggi 30 cm berjumlah 24 buah dan benda uji kuat lentur berupa balok dengan panjang 60 cm, lebar 15 cm dan tinggi 15 cm sebanyak 12 buah. Pengujian dilakukan setelah 28 hari. Kuat tekan, tarik belah dan kuat lentur pada beton meningkat setelah diberi penambahan serat kawat bendrat berkait. Peningkatan optimum terjadi pada variasi kadar serat 0,75% dengan hasil berturut-turut sebesar 35,9336 MPa, 3,9848 MPa, dan 8,9380 MPa. Semakin banyak variasi kadar serat akan menyebabkan sulitnya pergerakan agregat sehingga semakin besar kemungkinan terjadi balling effect pada saat pengerjaan beton. Kata kunci : kawat bendrat, kuat tekan, tarik belah, kuat lentur