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Kota bandar lampung,
Lampung
INDONESIA
Jurnal Rekayasa Sipil dan Desain
Published by Universitas Lampung
ISSN : 23030011     EISSN : 27150690     DOI : -
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
Arjuna Subject : -
Articles 840 Documents
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Perubahan Nilai Daya Dukung Tanah Lempung Lunak Akibat Stabilisasi Tanah menggunkaan Metode Deep Soil Mixing Pola Panels dengan Kapur 8% Salsabila Atalia Sadil; Iswan Iswan; Aminudin Syah
Jurnal Rekayasa Sipil dan Desain Vol 9, No 2 (2021): Edisi Juni 2021
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

Palembapang, South Lampung requires proper road construction for public transportation needs. However, the road conditions in the village were found heavily damaged because of poor soil conditions. Therefore, soil stabilization must be carried out. The method of this study is deep soil mixing (DSM), which is soil improvement method by mixing additional materials in the field (in-site). This method is more affordable because they use their soil as theiraggregate and reduce the transportation budget because of stuff supply.The purpose of this study is to determine the change of soil load-bearing capacity due to the variation of distance and the diameter of the DSM stabilization column on soft clay soil and soft clay soil with 8% lime. This study shows that the stabilization of soft clay soil with 8% lime has increased its load-bearing capacity (qu) from 10.368 kg/cm2to 14.69 kg/cm2. The increase of soil load-bearing capacity with the stabilization of the DSM column is proportional to the volume of soil improvement. The largest increase of the soil load-bearing capacity occurred in 1D columns range and 3.75 cm diameter. The distance variation also gives a more significant change compared to the variation of diameter. The most efficient distance and diameter are at the variation of the distance of 1.25D columns range and 2.5 cm diameter.
Evaluasi Stabilitas Breakwater pada Kecamatan Panjang Rizqi Kurniawan; Subuh Tugiono; Endro Prasetyo Wahono; Ahmad Zakaria
Jurnal Rekayasa Sipil dan Desain Vol 9, No 4 (2021): Edisi Desember 2021
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Abstract 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, Stability
Body Cliff Safety Study Of Double Track Railway With Geostudio Slope/W Analysis Yance Y D Warikar; Nur Arifaini; Amril Ma'ruf Siregar
Jurnal Rekayasa Sipil dan Desain Vol 8, No 1 (2020): Edisi Maret 2020
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Abstract

Double track railway construction area railroad crossing many hills and rivers makes the railroad body located between the slopes of the hill. Around the area, disasters that often occur are landslides caused by increased pore water pressure on the slope resulting a decrease in the shear strength of the soil (c) and the deep shear angle (φ). Therefore in planning the handling of cliffs of railroad tracks it is necessary to analyze the stability of slopes or cliffs so as not to endanger the surrounding environment, especially in railroad transportation. The purpose of the research are: (1) To know the cross section of the safest slope by considering the slope angle, (2) To Find the value of the safe factor for shear and rolling on the slope by using software analysis, (3) To know type of slope safety in accordance with slope conditions. The location of this research was conducted in the Martapura-Giham area which is the location of the construction of double track railroad, Waykanan Regency, Lampung. The method used in the analysis of slope stability is Geostudio Slope/W Analysis by making 3 cross-section slope designs which are then analyzed further. The results of the analysis found that the slope conditions before handling obtained the number of safe factors with ordinary, bishop, and morgenstern methods, respectively 0.730; 0.911; and 0.950. While after handling with sheetpile construction, it was obtained the number of safe factors with ordinary, bishop, and morgenstern methods in a row that is 2,945; 3,633; and No Solution. It can be concluded that the slope condition after handling shows increase in the value of the safe factor by 500%. Keywords: Geostudio Slope/W Analysis, Double track railroad, Cliffs and slope stability.
Pengaruh Penambahan Semen pada Tanah Lempung terhadap Parameter Konsolidasi dan Kecepatan Penurunan Fara Dwitya; Andius Dasa Putra; I Iswan
Jurnal Rekayasa Sipil dan Desain Vol 9, No 2 (2021): Edisi Juni 2021
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Abstract

Soil is a subgrade for basic building construction. While receiving the load, soil will settle, which take long time to complete for soft clays because of its low permeability. The problem that is caused by settlement as seen in Palembapang, Umbul Ligoh, South Lampung has low bearing capacity, this leads to cracks in the house walls, bumpy roads, and the settlement of the road constructions. One of the soil stabilization effort is addingcement as an additive material because it has very fine particles so that it can fill the soil pores and bond to the contact area between the soil grains and has a function as a strong binder. This work aimed to study the parameters of the compression index (Cc), coefficient of consolidation (Cv), consolidation settlement (Sc) and time of consolidation (t) due to soft clay mixing with cement as a soil stabilization material with percentage of 4%, 8% and 12%. Due to cement addition into soft clay, compaction with the standard proctor experienced a decrease the optimum moisture content (OMC) and an increase in the weight of maximum dry volume. In addition, in the consolidation test, the compression index (Cc) and consolidation settlement (Sc) decreased 7,95% and 5,44%, moreover the coefficient consolidation (Cv) increase 2,74% and the time of consolidation (t) were faster. The most change on consolidation parameter was recorded by the sample mixed with 12% of cement.
Investigasi dan Retrofitting Struktur Balok dan Kolom Beton Bertulang dengan Glass Fiber Reinforced Polymer (Gfrp) Arnaldo Clever; Fikri Alami; Mohd. Isneini
Jurnal Rekayasa Sipil dan Desain Vol 8, No 2 (2020): Edisi Juni 2020
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Bangunan Rumah Sakit Pendidikan Universitas Lampung sudah cukup lama terhenti dan terbengkalai pembangunannya, sehingga memunculkan kekhawatiran akan kekuatan eksisting yang ada jika pembangunan dilakukan kembali. Oleh sebab itu, perlu dilakukan evaluasi dan perkuatan struktur untuk meningkatkan kekuatan dan kelayakan bangunan tersebut.Ada dua metode yang digunakan dalam mengevaluasi bangunan ini yaitu metode survey langsung di lapangan dan metode analisis menggunakan program berbasis FEA. Untuk perhitungan perkuatan digunakan peraturan American Concrete Institute (ACI 440.2R, 2008). Sedangkan material utama perkuatannya digunakan Glass Fiber Reinforced Polymer (GFRP).Dari hasil pengolahan data, didapatkan 46,5% dari 43 balok lantai 1 yang ditinjau membutuhkan perkuatan di daerah lentur dan 21,95% dari 41 kolom basement dan lantai 1 yang ditinjau membutuhkan perkuatan di daerah aksial. Pada perhitungan perkuatan balok lentur didapatkan paling banyak 7 lapis material GFRP dan 6 lapis untuk material CFRP. Sedangkan pada perhitungan perkuatan kolom aksial didapatkan paling banyak 8 lapis GFRP dan 7 lapis untuk material CFRP. Element struktur balok lentur yang diperkuat pada penelitian ini memiliki tipe keruntuhan tarik dan untuk struktur kolom aksial yang diperkuat memiliki tipe keruntuhan tekan. Kata kunci :    Evaluasi Struktur, Perkuatan Struktur, GFRP, Balok  dan  Kolom
peningkatan kualitas air menggunakan filter mangan zeolit dan karbon aktif Panglima Jundulloh; Dwi Joko Winarno; Dyah Indriana Kusumastuti; Siti Nurul Khotimah
Jurnal Rekayasa Sipil dan Desain Vol 9, No 4 (2021): Edisi Desember 2021
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  Water is a chemical compound that is very important for human life and other living things. the quantity and quality of the well as a water source must meet the physical, chemical and bacteriological requirements. Therefore, proper groundwater treatment is needed to process it into clean water that meets the requirements in terms of quality and quantity so that it is suitable for use by humans. To improve water quality, you can use methods such as filtration. In this final project, water quality improvement is carried out using manganese zeolite and activated carbon filters. The result of this research is to know the efficiency of iron (Fe), manganese (Mn) and E.coli removal using this unit. The results of laboratory tests conducted by the Research and Industrial Standardization Institute of Bandar Lampung with water samples with most parameters such as Fe and Mn have met the standards of the Regulation of the Minister of Health of the Republic of Indonesia Number 32/MENKES/PER/II/2017 concerning Clean Water Quality Requirements, but the test results with E-coli bacteria parameter is 2863 per 100 ml sample which exceeds the maximum level of 0. From this study manganese zeolite and activated carbon filters are effective in reducing TDS levels by 133 and E-Coli bacteria with results of <300 Keywords: water cleaner, zeolite manganese filter and activated carbon
Kinerja Kuat Geser Interface Beton Lama (Substrate) Dan Beton Baru (Overlay) Dengan Variasi Sudut Kemiringan Dan Volume Fraksi Serat Baja Imam Hussein; Vera Agustriana Noorhidana; Mohd. Isneini
Jurnal Rekayasa Sipil dan Desain Vol 8, No 3 (2020): Edisi September 2020
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Dalam suatu pekerjaan struktur seringkali dijumpai pekerjaan perbaikan atau perkuatan struktur beton. Permasalahan yang sering muncul pada pekerjaan perbaikan atau perkuatan struktur terletak pada lekatan antara beton lama dan baru, dimana pertemuan (interface) merupakan bagian terlemah dari struktur. Penelitian ini bertujuan untuk mengetahui kinerja kuat geser lekatan interface antara beton lama (substrate) dengan beton baru (overlay) dengan variasi sudut kemiringan dan volume fraksi serat baja pada beton baru. Metode yang digunakan adalah metode Slant Shear Test, dengan menggunakan benda uji berbentuk prisma dengan dimensi 150 x 150 x 300 mm. Terdapat 2 variasi yang digunakan yaitu, (1) variasi sudut kemiringan 30°,45°, dan 70°dan (2) variasi campuran serat baja pada lapis overlay sebesar 0%, 0,5%, 1% dan 1,5%. Pada setiap variasi dibuat benda uji kuat tekan (kubus 150 x 150 x 150) dan kuat tarik lentur (balok 100 x 100 x 400). Dari hasil penelitian dapat disimpulkan bahwa 1) Kemiringan interface antara beton lama dan beton baru terhadap arah beban tekan mempengaruhi kuat geser lekatan antara beton lama dan beton baru, 2) Penambahan serat baja dalam beton overlay dapat meningkatkan kuat lekatan antara beton lama-baru dan kuat tarik lentur beton.  Kata kunci : kuat geser, interface, substrate, overlay, kuat tarik lentur.
Analisis struktur atas jembatan kereta api jalur tunggal pc i girder bentang 35 meter way pengubuan Muhammad Tri Wahyuddin; Bayzoni Bayzoni; Amril Ma&#039;ruf Siregar
Jurnal Rekayasa Sipil dan Desain Vol 8, No 3 (2020): Edisi September 2020
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Beton prategang merupakan jenis beton dengan tulangan baja ditarik dan menghasilkan sistem kesetimbangan pada tegangan dalam tarik pada baja dan tekan pada beton yang dapat meningkatkan kemampuan beton menahan beban luar. Terdapat beragam bentuk profil gelagar beton prategang antara lain box girder, profil U, dan profil I. Pada analisis struktur atas jembatan ini digunakan gelagar profil I atau disebut juga PC I girder. Tujuan dari penelitian ini adalah menganalisis struktur atas jembatan dengan gelagar profil I, menghitung dan melakukan kontrol keamanan terhadap besar lendutan, geser, tegangan serta momen ultimit.Berdasarkan analisis struktur atas jembatan diperoleh dimensi PC I girder dengan tinggi 2,17 m, lebar bidang bawah 0,75 m, lebar bidang atas 0,5 m, dan lebar bidang badan 0,25 m. Pada perhitungan gaya prategang didapatkan gaya prategang awal sebesar 13513,98 kN, gaya prategang saat jacking sebesar 15898,8 kN, dan total kehilangan gaya prategang sebesar 4291,811 kN atau sebesar 27%, sehingga diperoleh nilai gaya prategang efektif sebesar 11606,99 kN. Dan pada perhitungan momen ultimit dinyatakan aman karena diperoleh kapasitas momen ultimit pada balok prategang sebesar 21047,65905 kNm yang nilai nya lebih besar dari momen ultimit terbesar dari hasil kombinasi yaitu sebesar 13764,95 kNm.Kata Kunci : Struktur Atas Jembatan, PC I Girder, Beton Prategang
Kuat Lekat Beton dengan Variasi Umur Beton, Kekasaran Permukaan, Kelembapan dan Mutu Beton Vania Meutia Andhini; Vera Agustriana Noorhidana; Fikri Alami
Jurnal Rekayasa Sipil dan Desain Vol 8, No 4 (2020): Edisi Desember 2020
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AbstractStructure strengthening by adding fresh concrete mix to he existing concrete has a weakness in the bonding between the concrete joint. Research on the concrete-to-concrete bond strength has been carried out with various treatments. This study aims to determine the factors that influence bond strength between old concrete (substrate) and new concrete (overlay). The factors include are the substrate's ages, substrate surface's roughness, water content of the substrate and the compressive strength of the added concrete.The test method used in this study is slant shear test to quantify the bond strength. 150 × 150 × 300 mm2 prism with the interface line angle at 30°to the vertical was used as the specimen. The specimen cast in 2 phases, first substrate casting and second overlay casting. The overlay cast at different age of substrate depends on the variation needed. The treatments given are: 1) difference of overlay compressive strength which use 15 MPa, 25 MPa and 45 MPa concrete compressive strength; 2) difference of substrate’s ages at 7 days, 28 days and 42 days; 3) difference of substrate surface’s roughness with 3 sub-variations smooth, medium and coarse; 4) difference of water content of substrate specimen with dry, SSD and wet sub-variations.Keyword : concrete-to-concrete bond strength, slant shear test, interface roughness, substrate's ages.
Gap Acceptance Review Of Traffic Conflic In The Road Of Raden Ajeng Kartini. Fakhriyah Putri; Sasana Putra; Muhammad Karami
Jurnal Rekayasa Sipil dan Desain Vol 9, No 1 (2021): Edisi Maret 2021
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The behavior of drivers who do not consider the movements of other drivers can cause traffic problems, such as congestion and traffic accidents that can occur on the road. The stagger intersection at Jalan Raden Ajeng Kartini is often crowded with vehicles that can cause congestion. This is due to the behavior of drivers crossing from Cut Nyak Dien road to Lindu road, causing a conflict of delays influenced by weaving movements. The purpose of this research is to analyze the amount of delay due to weaving motion on the Raden Ajeng Kartini road.This study uses an analysis of the gap acceptance approach, to get the big results of vehicle delays caused by weaving motion, the average gap time and critical gap.The results of this study show that the vehicle delay caused by weaving motion is 3.20 seconds and 8.93 seconds in the morning and evening. The average gap time was 82.50 seconds in the morning and 94.36 seconds in the afternoon, while the critical gap was 4.34 seconds in the morning and 3.88 seconds in the afternoon. Keywords: Gap Acceptance, Weaving, Delay.

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