Jurnal Rekayasa Sipil dan Desain
Not a member yet
545 research outputs found
Sort by
Perencanaan Dinding Penahan Sebagai Alternatif Pencegah Bahaya Longsor Pada Konstruksi Pangkal Jembatan
Get PDFJembatan adalah prasarana sipil yang membentang di atas aliran sungai dan secara topografi tidak rata. Perbedaan elavasi dari daratan yang dilewati sungai ini membentuk suatu lereng. Bencana yang sering terjadi pada permukaan tanah yang tidak rata atau curam adalah longsor. Kondisi lereng dengan kemiringan yang curam dan menahan beban yang besar dapat mengakibatkan longsor. Oleh karena itu diperlukan dinding penahan untuk menjaga kestabilan lereng agar tidak terjadi penurunan sehingga jembatan tetp aman dari bahaya longsor. Penelitian ini bertujuan untuk merencanakan dinding penahan dalam perlindungan pangkal jembatan dari bahaya longsor.Dalam penelitian ini letak dinding penahan sesuai dengan data gambar rencana. Kemudian dilakukan analisis geoteknik dengan dimensi dinding yang direncakan, dari data tanah dan data beban dapat diperoleh tekanan tanah yang terjdai. Melalui analisis geoteknik didapatkan nilai stabilitas dinding penahan tanah berupa nilai keamanan terhadap guling,geser dan daya dukung tanah hingga dimensi yang dipakai aman. Selanjutnya dilakukan perhitungan struktur penulangan dinding penahan tanah dan diperoleh gambar rencana dari dinding penahan tanah. Dimensi dinding penahan tanah yang direncakan adalah sebesar 0,3 m untuk lebar mercu, panjang kaki 2,4 m, tebal kaki 0,5 m dengan tinggi dinding 5 m. Berdasarkan analisis stabilitas dinding yang dilakukan, disimpulkan dinding aman dari bahaya guling, geser, serta aman dalam perhitungan daya dukung tanah sehingga dinding mampu menjadi salah satu alternatif upaya pencegah bahaya longsor
Pengaruh Penambahan Zat Additive Abu Sekam Padi dan Matos Terhadap Nilai CBR (California Bearing Ratio) Tanah Lempung
Get PDFSoils have different types and different carrying capacity. One of them is clay soil that has the low carrying capacity. Viewed from the rapid development of infrastructure in Indonesia, does not rule out the possibility that the infrastructure built in areas with clay soil types. Given the small carrying capacity of the clay, the soil should be improved in order to support the development of a construction.soil improvement with an additional mixture of rice husk ash and matos as stabilizer can improve soil quality. This research was conducted with rice husk ash mixture of 6%, 8%, 10%, and 12% and matos with level 3,3898% gr. Then curing for 7 days, 14 days, 21 days, and 28 days without immersion.Soil that used in research is from Sidomulyo, South Lampung is a type of clay soil that belongs to the A-7-5 group based on the AASTHO classification. Research in laboratory showed that 28 days of curing with 12% rice husk ash mixture had the highest CBR value from other curing durations. Soil clay CBR value increased from 7.3% to 31.8%. This shows that the ash mixture of rice husk and matos is quite effective in increasing the carrying capacity of clay soil.
Kajian Tingkat Degradasi Pada Pelaksanaan Konstruksi Jalan Beraspal
Get PDFOne causes of construction failure on flexible pavement is changed composition of the aggregate gradation in asphalt mixture of the plan due to mechanical or non-mechanical process. Aggregates can occur degradation, ie gradation changes due to aggregate breakage of grains. Aggregate degradation can be caused by both mechanical and chemical processes. The decrease in quality occurring in the asphalt mixture is thought to be due to the aggregate gradation change in the asphalt mixture. To find this out, a study on the degradation level of flexible pavement construction is conducted,from Asphalt Mixing Plant to overlay location. Used mixture are Asphalt Concrete-Wearing Course produced by PT. Manggung Polah Raya for location on Sultan Agung Street, Bandar Lampung, Lampung and PT. Rindang Tigasatu Pratama for location on Teuku Cik Ditiro Street, Bandar Lampung, Lampung. Test of samples performed are extraction test and sieves analysis test. From the research result, it is founded that there is degradation during transport of asphalt mixture from Asphalt Mixing Plant to the location. Average degradation percent of location I, location II and location III PT. Manggung Polah Raya and PT. Rindang Tigasatu Pratama is %CA decreased by 5.17%, %FA increased by 3.67% and %filler increased 1.50%. Factors affecting degradation are due to work execution, specific gravity of aggregate and time of transport.Keywords: Road Pavement, Asphalt Concrete, Degradatio
Analisis dan Perencanaan Sistem Drainase di Lingkungan Universitas Lampung(Studi Kasus Zona II : Fakultas Matematika dan Ilmu Pengetahuan Alam, Fakultas Kedokteran dan Fakultas Keguruan dan Ilmu Pendidikan)
Get PDFLampung University as one of the first and oldest universities in Lampung Province is one of the best universities in Sumatra and continues to improve its academic quality, and have A Accreditation. The improvement of Lampung University facilities and infrastructure is continuously conducted in order to improve both academic and non-academic quality. The form of non-academic quality improvement is environmental arrangement with the drainage system planning. It is intended to solve some of the flood puddles that occurred during the rainy season due to the lack of optimal condition of existing drainage in the University of Lampung.The analysis conducted in this research includes hydrological analysis and hydraulics analysis. Hydrological analysis aimed to calculate the discharge plan using rational method and hydraulic analysis aims to calculate the capacity of existing drainage channels. So we can know the position of the flood point and planning the new channel dimension.Based on the analysis of the flood point occurred at DN15 cross section with 9.5 m long overflow which is located in front of the entrance portal of Faculty of Mathematics and Sciences. There are also some new drainage section design at DN63 point along 56 m, DN64 along 45 m and DN65 along 67 m as they are still a natural drainage. It is also necessary to give the drainage channel maintenance by channel normalization, garbage retaining lattice installation, and periodic cleaning of channels
Pengaruh Penambahan Fiber Baja Seling Dengan Volume Fraction 0,4% Terhadap Kuat Tekan dan Kuat Tarik Lentur dengan Tinggi Beton Serat 0; 0,25; 0,50; 0,75 dan 1 Pada Beton Mutu Normal
No full textAbstractConcrete is one of the important parts in the development of infrastructure building. Many advantages obtained from the use of concrete, nevertheless there is a shortage which is weak against tensile and ductile. The weakness of concrete can be improved by adding fiber into the concrete mix evenly with random orientation. This study was conducted to determine the effect of addition of wire rope fiber on compressive strength and flexural tensile strength with the height of fiber-reinforced concrete 0; 0.25; 0.50; 0.75 and 1 on normal strength concrete. This study used an experimental method which is conducted at the Laboratory of Materials and Construction Faculty of Engineering, University of Lampung. The sample for compressive strength test is a cylinder with a diameter of 15 cm and 30 cm in height, while the sample for flexural tensile strength test is a block with a length of 40 cm, 10 cm in width and 10 cm in height. The testing for the compressive strength and flexural tensilestrength of normal concrete with high-quality fiber-reinforced concrete 0; 0.25; 0.50; 0.75 and 1 performed after 14 and 28 days. Maximum compressive strength and flexural strength occurs at a height of 0,75 fiber-reinforced concrete. The maximum compressive strength is 27.3649 MPa, increasedby 3.5714%. The maximum flexural strength is 5.4880 MPa, increasedby 18.9475%. The addition of wire rope fiber does not make a major contribution to the increase of compressive strength, but the flexural tensile strength. The wire rope fiber in this study has high tensile strength, i.e. 1733.46 MPa so it can provide a significant increase in the flexural strength. Keywords : compressive strength, flexural strength, fiber concrete, wire rope fiber AbstrakBeton merupakan salah satu bagian penting dalam perkembangan infrastruktur bangunan. Banyak kelebihan yang didapatkan dari penggunaan beton, meskipun demikian terdapat kekurangan yaitu lemah terhadap tarik dan bersifat getas. Kelemahan beton dapat diperbaiki dengan menambah serat kedalam adukan beton secara merata dengan orientasi acak. Penelitian ini dilakukan untuk mengetahui pengaruh penambahan serat baja seling terhadap kuat tekan dan kuat tarik lentur dengan tinggi beton serat 0; 0,25; 0,50; 0,75 dan 1 pada beton mutu normal. Studi ini menggunakan metode eksperimen yang dilakukan di Laboratorium Bahan dan Konstruksi Fakultas Teknik Universitas Lampung. Benda uji kuat tekan berupa silinder dengan diameter 15 cm dan tinggi 30 cm, benda uji kuat lentur berupa balok dengan panjang 40 cm, lebar 10 cm dan tinggi 10 cm. Pengujian kuat tekan dan kuat lentur beton mutu normal dengan tinggi beton serat 0; 0,25; 0,50; 0,75 dan 1 dilakukan setelah 14 dan 28 hari. Kuat tekan dan kuat lentur maksimal terjadi pada ketinggian beton serat 0,75. Kuat tekan maksimal sebesar 27,3649 MPa, meningkat sebesar 3,5714%. Kuat lentur maksimal sebesar 5,4880 MPa, meningkat sebesar 18,9475%. Penambahan serat baja seling tidak memberikan kontribusi yang besar dalam peningkatan kuat tekan, akan tetapi pada kuat tarik lentur. Serat baja seling pada penelitian ini mempunyai kuat tarik yang tinggi, yaitu 1733,46 MPa sehingga dapat memberikan peningkatan kuat lentur yang signifikan. Kata kunci : kuat tekan, kuat lentur, beton serat, serat baja seling
ANALISIS EKONOMI TEKNIK INVESTASI PROYEK (STUDI KASUS PADA HOTEL ZODIAK LAMPUNG)
No full textInvestor yang berinvestasi dalam suatu proyek pasti berharap agar mendapat keuntungan dari investasinya. Oleh karena itu, sebelum memulai suatu investasi, hendaknya dilakukan suatu studi kelayakan untuk menilai apakah investasi yang akan ditanamkan layak atau tidak. Dalam penelitian ini, kelayakan investasi hotel hanya ditinjau berdasarkan aspek ekonomi teknik. Parameter yang digunakan untuk meninjau investasi yaitu menggunakan metode Net Present Value (NPV), Benefit to Cost Ratio (BCR), Internal Rate of Return (IRR), Payback Period (PP) dan Break Even Point (BEP). Analisis kelayakan proyek ini dibuat dalam 8 (delapan) buah skenario. Setiap skenario memiliki variasi pada tingkat inflasi, faktor kekosongan kamar dan sumber dana. Hasil analisis kelayakan investasi yang paling menguntungkan adalah skenario pertama, yang mengasumsikan sumber dana investasi berasal dari modal sendiri dengan faktor kekosongan kamar sebesar 25%, tingkat inflasi 10%, tingkat suku bunga 7,5% per tahun dan rate of return sebesar 10%. Sementara itu, skenario lainnya menunjukkan bahwa setiap skenario tersebut tidak dapat memenuhi satu parameter atau lebih. Kata kunci : Studi kelayakan, Net Present Value (NPV), Benefit Cost Ratio (BCR), Internal Rate of Return (IRR), Payback Period (PP), Break Even Point (BEP)
Analisis Harga Satuan Pekerjaan Jalan dan Jembatan Menggunakan Program Lazarus (studi kasus devisi 3, 5, 6, & 7)
Get PDFIn the activity construction work must be would related to the cost. Someone who estimate the budget construction cost is called estimator. An estimate of the cost was called unit price analysis of work. Most of unit price analysis still was counted manually , but if seen from various points of view , calculations conducted in the manual still cannot meet its demands availability of information a quick and accurate. Therefore needs to get a program automatically for can count quickly unit price analysis.To observe a unit price of work so fast and accurated can be making an application analysis using the lazarus and than becomparations with the method of analysis issued by ministry of public worksThe result of making program unit price analysis of work of using lazarus is tested and validated by calculation use secondary data issued by ministry of public works. By using this program the calculations be more effective when compared with calculate by hand. Keywords: Unit price analysis, Lazaru
Pengaruh Variasi Waktu Perendaman Terhadap Daya Dukung Tanah Lempung Dan Lanau Yang Distabilisasi Menggunakan Semen
Get PDFSoil is the material that serves as a support for the construction base. Each region has different soil characteristics in other areas, there has a carrying capacity of good to bad or poor. Clay and silt soil has a bearing capacity and low soil properties. To overcome this, the need to improve the soil natures with the stabilization method. Stabilization is to improve the physical and mechanical properties of the soil so that it meets certain technical requirements. One way is with a cement stabilization. In this study, the cement used is a cement-type portland cement. This study aimed to compare the value of CBR clay and silt before and after stabilized by the addition of cement and given soaking treatment. Soil used is a type of clay taken from the village of Rawa Sragi, District Jabung, East Lampung district and silt types from Yosomulyo Village, East Metro District, Metro City. In CBR soaking test with mixture of 9% cement with modified proctor compaction and cured for 28 days, CBR values decrease to 28,7% for clay that soaked for 28 days, while the CBR value for silt soil with the same condition descease to 37,8%. The soaking treatment is proven to decrease the value of CBR significantly compared with the optimum condition of both soil
Evaluasi Kinerja Rainwater Harvesting di Lingkungan Fakultas Teknik
No full textAbstractThis research aims to find the effectiveness of development the ground water tank, distribution system water supply in network, operations and water treatment and examination of water quality which is stored. Research conducting is using the method descriptive quantitative. This method of collect data dimensions PAH, data whole space the roof of the part that chatching water to ground water tank, rain data 2011 – 2013 as value inflow, standard water needs of the department of civil engineering on average each day as the value of the outflow. The research is obtainable potential saving groundwater within 3 years worth 45.3%, from the laboratory tests and testing physically water it is included on the criteria water quality category 1 class the water is aimed can be used to raw water drinking water, the distribution system water used the down feed system, water threatmen that is used ( filter solid material, the deposition of mud, absorption). Keywords : Rainwater, rainwater harvesting, the potential saving groundwater AbstrakTujuan penelitian ini adalah untuk mengetahui efektifitas pembangunan ground water tank tersebut, system distribusi jaringan air bakunya, pengoperasian dan perawatan airnya serta dengan menguji kualitas dari air yang ditampung. Penelitian yang dilakukan menggunakan metode deskriptif kuantitatif. Metode ini berupa mengumpulkan data dimensi PAH, data luasan atap keseluruhan bagian yang menangkap air ke ground water tank, data hujan tahun 2011 – 2013 sebagai nilai inflow, kebutuhan air baku jurusan teknik sipil rata – rata setiap harinya sebagai nilai outfow. Dari hasil penelitian ini didapat potensi penghematan air tanah dalam kurun waktu 3 tahun sebesar 45.3%, dari hasil uji laboratorium dan pengujian secara fisik air hujan tersebut masuk dalam kriteria mutu air kategori kelas 1 yaitu air yang peruntukannya dapat digunakan untuk air baku air minum, sistem distribusi air yang digunakan yaitu down feed system,water threatment yang digunakan (penyaring bahan padat, pengendapan lumpur, absopsi/penyerapan). Kata kunci: Air Hujan, Pemanen Air Hujan, Potensi Penghematan Air Tana
Pengaruh Bottom Ash sebagai Bahan Pengganti Sejumlah Pasir Terhadap Kuat Tekan, Kuat Lentur dan Modulus Elastistas Beton Mutu Tinggi
No full textAbstractOver time the production of high strength concrete it will increse more and more and otherwise it will decrease the natural resources. One of them is sand as concrete material. Based on the problem, it will be required another material, that can replace a number of the sand. Bottom ash is one of material from waste coal plant, generally have particle size or fine granule like as sand. This research is used to determine the variation of sand and bottom ash for high strength concrete. The testing are compressive strength with cylinder concrete 10x20 cm, flexural strength with beam concrete 10x10x40 cm, and modulus of elasticity concrete with cylinder concrete 15x30 cm. The compositions of the bottom ash for substitution the sand are 0%, 20%, 40%, 60%, 80% and 100%. The results of the compressive strength and flexural strength optimum testing are showed on variation 80% of bottom ash. Compressive strength values are 39,68 MPa (7 days age) and 45,41 MPa (28 days age). Flexural strength values are 4,62 MPa (7 days age) and 5,53 MPa (28 days age). Modulus of elasticity concrete optimum are showed on variation 20% and 80% of bottom ash with 60625,67 MPa and 59441,67 MPa (28 days age). Keywords : high strength concrete, bottom ash, compressive strength, flexural strength, modulus of elasticity concrete. AbstrakSeiring berjalannya waktu produksi beton mutu tinggi semakin lama akan semakin meningkat dan sebaliknya akan mengakibatkan berkurangnya sumber daya alam. Salah satunya ialah pasir sebagai bahan baku beton. Berdasarkan permasalahan tersebut, maka diperlukan suatu material lain yang dapat menggantikan sebagian sumber daya alam tersebut. Bottom ash merupakan salah satu material dari limbah hasil proses pembakaran batubara pada sektor pembangkit listrik, umumnya memiliki ukuran partikel atau butiran yang halus seperti pasir. Penelitian ini dilakukan untuk menentukan penggunaan variasi pasir dan bottom ash yang baik bagi beton mutu tinggi. Pengujian berupa uji kuat tekan dengan silinder beton 10x20 cm, uji kuat lentur dengan balok 10x10x40 cm dan modulus elastisitas beton dengan silinder beton 15x30 cm. Komposisi penggantian pasir dengan bottom ash sebanyak 0%, 20%, 40%, 60%, 80% dan 100%. Hasil pengujian kuat tekan dan kuat lentur optimum diperoleh pada variasi 80%bottom ash. Nilai kuat tekan sebesar 39,68 MPa (umur 7 hari) dan 45,41 MPa (umur 28 hari). Nilai kuat lentur sebesar 4,62 MPa (umur 7 hari) dan 5,53 MPa (umur 28 hari). Nilai modulus elastisitas beton optimum diperoleh pada variasi 20% dan 80% bottom ashyaitu sebesar 60625,67 MPa dan 59441,67 MPa (umur 28 hari). Kata kunci : beton mutu tinggi, bottom ash, kuat tekan, kuat tarik lentur, modulus elastisitas beton