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Randy Setiawan

Program Studi Teknik Sipil Universitas Teknokrat Indonesia

Author-ID : 2548790

Civil Engineering, Building, Construction & Architecture Engineering Transportation Other

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REVITALISASI JARINGAN IRIGASI RAWA SUB-SEKUNDER UNTUK MENINGKATKAN PRODUKTIFITAS HASIL PERTANIAN (STUDI KASUS IRIGASI SUB-SEKUNDER RAWA PITU SP 2) Arifaini, Nur; Zakaria, Ahmad; Setiawan, Randy
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 18, No 3 (2014): Edisi Desember 2014
Publisher : UNIVERSITAS LAMPUNG

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Lampung Province has a fairly wide swamp area, one of them is in Rawa Pitu area. Swamp irri- gation in Rawa Pitu area has not been used extensively. The purpose of this research is to conduct a study, analysis, and systematically arranged recommendations on revitalizing Rawa Pitu swamp area that can be optimized to increase food crops production in order to improve the welfare of society. The research site is located in the sub-district of Rawa Pitu, Tulang Bawang regency. The location of Rawa Pitu is between the Tulang Bawang and the Pidada rivers. Analysis in this study is more focused on the revitalization of the sub-secondary of swamp irrigation system to increase agricultural productivity in Rawa Pitu area by comparing before and after revitalization. From the calculation, it is obtained that: the maximum of 3 days cumulative daily rainfall with the 5 years return period is obtained 104,12 mm and the amount of drainage modulus is obtained at 4,016 mm / day. Agricultural yield before revitalized, for the rice, the profit is Rp.13.697.819.386,- and for the crops, the profit is Rp.12.452.563.078.-. Agricultural production after revitalized is in- crease, for the rice, the profit is Rp.18.739.594.819,- and for the crops, the profit is Rp.17.035.995.290,-. The value of benefit cost ratio is about 1,38 and it is greater than 1,0, so that there is a profit, and net present value is positive, it is Rp.7.642.988.768,-.

PENGARUH SULFAT PADA KEKUATAN BETON YANG MENGGUNAKAN LIMBAH BATU BARA SEBAGAI BAHAN PENGGANTI SEMEN Randy Setiawan; Fera Lestari; Dian Pratiwi
Jurnal Teknik Sipil Vol 8, No 2 (2017): Oktober
Publisher : Universitas Bandar Lampung

Many industries meet the electricity needs by establishing their own Steam Power (power plant) coal-fired. Burning coal produces waste in the form of fly ash (fly ash) in very much. Therefore, this study uses fly ash concrete-making materials such as cement replacement. In this research, test the strength of normal concrete and geopolymer concrete cube measuring 15 x 15 X15 cm 3. Materials used in this study were sand (fine aggregate), gravel / split (coarse aggregate), water, NaOH solution, fly ash / fly ash, cement, alkaline activator is a solution of sodium silicate, sodium hydroxide, sulfate and water. Measurement of compressive strength of geopolymer concrete and ordinary concrete with each of treated water tidal sulfate (treatment on ferrocement tanks) and untreated water tidal sulfate at daily intervals to the 1st, 7th, 14th, 21st , to-28. Each daily intervals used 5 pieces of concrete. Analysis of the data used is the ratio between the compressive strength of ordinary concrete and geopolymer. Conclusion of this research is fly ash can be used instead of 100% cement to mix concrete. Sulfuric affect the strength of normal concrete. While on geopolymer concrete sulfate solution has not yet affected the strength of concrete.

PERHITUNGAN DIMENSI SEAWALL MENGGUNAKAN LAZARUS Fera Lestari; Randy Setiawan; Dian Pratiwi
Jurnal Teknik Sipil Vol 9, No 1 (2018): April
Publisher : Universitas Bandar Lampung

PT. Daya Radar Utama has built and repaired various types of ships including steel, aluminum alloy, and fiberglass reinforced plastic. In general, Graving Dock and Noahtu Port Bandar Lampung provide supporting facilities for repairs of large capacity ships (maximum 30000 DWT), Complete facilities and infrastructure for progress in the field of sea transportation. A wave barrier is needed to support the activities in Graving Dock and the Port of Noahtu Bandar Lampung in the form of seawall. Seawall or beach walls are beach buildings that are built on the coastline or on land that are used to protect the beach directly from wave attacks. The location of this study was carried out in the city of Bandar Lampung with research objects, namely on the pier and PT. Daya Radar Utama. Data collection in this study consisted of wind data, wave data, tide data, soil data, and sediment data. These data are obtained from the planning data of the dock construction in the company PT. Daya Radar Utama.To make it easier to get the dimensions of the seawall, a tool is needed to simplify the calculation. One program that can be used to simplify calculating the dimensions needed in a seawall plan is Lazarus because it is open source and discusses relatively easy programming.Calculation of seawall dimensions with this program can be done easily and quickly, compared to manual calculations. In the planning of making seawall stone types affect the seawall. In making seawall using the program, it is necessary to pay attention to rounding for the weight of protected layers.

Pengaruh Aksesibilitas dan Karakteristik Sosial Ekonomi Terhadap Mobilitas Masyarakat (Studi Kasus di Kecamatan Tanjung Karang Pusat Kota Bandar Lampung) Randy Setiawan
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 23, No 2 (2019): Edisi Agustus 2019
Publisher : UNIVERSITAS LAMPUNG

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The purpose of this study is analyze the correlation of accessibility to the level of mobility and the correlation of mobility to socio-economic in Tanjung Karang Pusat sub-district. The sample targets are the people in Tanjung Karang Pusat sub-district as well as from the competent parties in their field, using the random sampling technique. Data collection is done through questioner with descriptive analysis method and PSPP analysis. Based on the calculation of IRI (index of road infrastructure) value in Tanjung Karang Pusat sub district, which is 5.74, the value almost meets the national minimum value requirement, which is 6. For accessibility index is 22,289 larger than MSS (>5,0) while for mobility index has a value of 1.355 smaller than MSS (minimum service standard) requirements that have been set which is > 2.0. The level of mobility is strongly influenced by the regional income itself. One way to increase the IRI value is by adding a road network. The writer took Durian Payung urban village which has a lot of vacant land area, which is increase 3.91 km and able to raise IRI to become 6,01 and exceed national minimum value. In correlating the mobility with the socioeconomic obtained the equation f(x) = 2,71+0,25X1+0,04X2+0,12X3+0,14X4 based on T-test the influential value is income. Correlation of accesability with mobility obtained the equation f(x) = 1,64+0,004X1+0,37X2+0,0002X3 based on T-test the influential value is travel destination . Correlation of accesability and socioeconomic with mobility obtained the equation f(x) = 2,12+0,11X1+0,03X2 based on T-test the influential value is accesability. Key words: Accesability, Mobility, Socioeconomic, Tanjung Karang Pusat

Co-Authors Ahmad Zakaria Fera Lestari Nur Arifaini Pratiwi, Dian

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