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All Journal Jurnal Teknik Sipil Ge-STRAM: Jurnal Perencanaan dan Rekayasa Sipil International Journal of Engineering, Science and Information Technology International Journal on Advanced Technology, Engineering, and Information System (IJATEIS) Journal of Manufacturing in Industrial Engineering & Technology
Helmy Darjanto, Helmy
Jurusan Teknik Sipil, Universitas Narotama, Jl. Arif Rahman Hakim No 51, Surabaya.
Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Social Sciences Transportation Other

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Penelusuran Potensi Likuifaksi Pantai Padang Berdasarkan Gradasi Butiran dan Tahanan Penetrasi Standar Hakam, Abdul; Darjanto, Helmy
Jurnal Teknik Sipil Vol 20, No 1 (2013)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (424.206 KB)

Abstract

Abstrak. Gempa Padang 30 September 2009 telah mengakibatkan terjadinya likuifaksi pada beberapa lokasi di kota Padang. Daerah-daerah yang terlikuifaksi berada di sekitar aliran sungai atau dekat tepi pantai. Untuk mendapatkan gambaran mengenai gradasi butiran tanah terlikuifaksi, telah dilakukan analisis saringan terhadap sampel tanah terlikuifaksi. Berdasarkan hasil pengujian tersebut dan data pengeboran, dilakukan penelusuran kembali potensi likuifaksi untuk lapisan tanah disekitar Pantai Padang. Penyelidikan tanah dengan menggunakan mesin bor dan pengujian penetrasi standar hingga kedalaman tanah keras telah dilakukan pada lokasi tersebut. Selanjutnya gradasi butiran tanah pada kedalaman-kedalaman tertentu dianalisis dengan cara membandingkan kurva gradasi butiran tanah dengan kurva potensi likuifaksi. Hasil penelusuran potensi likuifaksi untuk daerah Pantai Padang menhasilkan bahwa gradasi butiran tanah dilokasi tersebut memiliki potensi likuifaksi. Hasil tersebut dikompilasikan dengan analisis potensi likuifaksi berdasarkan nilai pukulan penetrasi standar. Kedalaman tanah yang berpotensi terlikuifaksi untuk Pantai Padang berada pada lapisan dengan  kedalaman kurang dari 10m.Abstract. Padang 30 September 2009 earthquake had caused liquefaction at several locations in the city of Padang. Generally, liquefied areas were around the rivers or near the beach. In order to get the gradation of the liquefied soil, sieve analysis was conducted on soil samples. Based on those test result and drilling data, the assessment of liquefaction potential for soil layer around the coast of Padang is done. Soil investigation using deep drilling and standard penetration test to the hard layer has been done on the site. Furthermore, the soil gradations at certain depths were analyzed by comparing the gradation curve of the liquefied soil. Liquefaction potential assessment based on the soil gradation shows that the Padang Beach area has the liquefaction potential. The results are then compiled with the analysis of the liquefaction potential based on the standard penetration test. The depth of the soil layer that potentially to liquefy in Padang Beach is on the depth of less than 10m.
Studi Daya Dukung Fondasi Tiang Pada Tanah Lempung Teguh Berdasarkan Pembebanan Kepala Tiang Dan Pergerakan Ujung Tiang Metode T-Z Firmansyah, Mochamad fikri firmansyah Fikri; Fausta, Rakha; Darjanto, Helmy
Ge-STRAM: Jurnal Perencanaan dan Rekayasa Sipil Vol 3 No 2: September 2020
Publisher : Universitas Dr. Soetomo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25139/jprs.v3i2.2963

Abstract

Developments in the calculation of foundation planning today have produced many methods and formulas for calculating the bearing capacity of foundations, such as the T-Z method, the Tezaghi method, the Mayerhof method, the Tomlison method, and other methods. So the purpose of this study was to determine the bearing capacity from tip movement of the foundation of each load with the T-Z method. The T-Z method explains rationally the mechanism of load transfer using a load transfer function commonly called TZ. In this method the pile foundation will be divided into several segments and the transfer function on each side segment which is a function of the shear strength of the soil and the surface properties of the side pile. From the analysis results of the TZPILE application, the bearing capacity is due to the settlement. At a settlement of 0,0001m; 0.001m; 0.0015m; 0.0025m; and 0.005m get a bearing capacity of 4.31kN; 31.69 kN; 35.6 kN; 43.44 kN; and 60.10kN. And on the reduction of permits on the foundation that occurs according to SNI 8460 - 2017 is 25mm, so the analysis obtained 12mm which still meets the requirements, 12mm get a bearing capacity of 1200kN at the tip of the pile. At a load of 600 kn the head of the pile can be held at a depth 4 meters. And for the maximum bearing capacity of the 18 meter pole, it can whitstand a bearing capacity of 1200 kn.
Studi Daya Dukung Fondasi Tiang Pada Tanah Lempung Teguh Berdasarkan Pembebanan Kepala Tiang Dan Pergerakan Ujung Tiang Metode T-Z Firmansyah, Mochamad fikri firmansyah Fikri; Fausta, Rakha; Darjanto, Helmy
Ge-STRAM: Jurnal Perencanaan dan Rekayasa Sipil Vol. 3 No. 2: September 2020
Publisher : Universitas Dr. Soetomo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25139/jprs.v3i2.2963

Abstract

Developments in the calculation of foundation planning today have produced many methods and formulas for calculating the bearing capacity of foundations, such as the T-Z method, the Tezaghi method, the Mayerhof method, the Tomlison method, and other methods. So the purpose of this study was to determine the bearing capacity from tip movement of the foundation of each load with the T-Z method. The T-Z method explains rationally the mechanism of load transfer using a load transfer function commonly called TZ. In this method the pile foundation will be divided into several segments and the transfer function on each side segment which is a function of the shear strength of the soil and the surface properties of the side pile. From the analysis results of the TZPILE application, the bearing capacity is due to the settlement. At a settlement of 0,0001m; 0.001m; 0.0015m; 0.0025m; and 0.005m get a bearing capacity of 4.31kN; 31.69 kN; 35.6 kN; 43.44 kN; and 60.10kN. And on the reduction of permits on the foundation that occurs according to SNI 8460 - 2017 is 25mm, so the analysis obtained 12mm which still meets the requirements, 12mm get a bearing capacity of 1200kN at the tip of the pile. At a load of 600 kn the head of the pile can be held at a depth 4 meters. And for the maximum bearing capacity of the 18 meter pole, it can whitstand a bearing capacity of 1200 kn.
CONSTRUCTION ANALYSIS OF SOLAR PANEL FOUNDATION ON THE SURFACE OF DAM WATER BODY WITH DAM SLOPE : (Case Study: Jatibarang Dam Solar Power Plant - Semarang) Puntodewo, Setyasto; Oetomo, Wateno; Darjanto, Helmy
INTERNATIONAL JOURNAL ON ADVANCED TECHNOLOGY, ENGINEERING, AND INFORMATION SYSTEM Vol. 2 No. 1 (2023): FEBRUARY
Publisher : Transpublika Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55047/ijateis.v2i1.694

Abstract

Indonesia's potential solar panel renewable energy capacity is 207.8 GW, currently only 0.135 GW has been realized or 0.02% has only been achieved. The development is still very broad and far ahead. The best place for a PLTS (Solar Power Plant) location is in the dam area. Why? The dam has a very large area and is owned by the government. This paper investigates the comparison of the cost and time of implementing PLTS foundation construction at the location of the Dam Slope (Landed) and on the Surface of the Dam Water Body (Floating). The research was conducted based on a case study of the application of PLTS in the Jatibarang Dam. Where in 2017 the construction of PLTS has been realized at the location of the Dam Slope. The PLTS Floating model was developed with a design simulation based on real data at the same dam location. The cost and time indicators for both Landed and Floating foundation models are then calculated and compared. From the analysis results, in terms of costs, the application of the PLTS Floating foundation is 41% higher than the foundation on the slopes. But in time 31% faster than the Slope foundation. By knowing the cost and time comparison between the two PLTS laying models, the aim is to design a PLTS development strategy for the Dam area based on the most optimal considerations.
The Study Deformation Of Bore Pile Foundation Caused by Horizontal Load In Soft Clay Jehlaeh, Fadel; Darjanto, Helmy; Sutowijoyo, Hendro
International Journal of Engineering, Science and Information Technology Vol 1, No 1 (2021)
Publisher : Department of Information Technology, Universitas Malikussaleh, Aceh Utara, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1303.075 KB) | DOI: 10.52088/ijesty.v1i1.59

Abstract

A sturdy of building must be contain with a strong foundation, which is able to withstand the burden on it;  channel the load into the ground and be able to withstand external forces such as earthquakes. In this study discussed the deformation of the bore pile foundation due to horizontal load on the soil slope by using the Lpile application.The  aim is to know the displacement of foundation motion due to horizontal loads using the Lpile application, Lateral bearing capacity analysis which is important aspect in the design of the foundation to anticipate the failure of the pile foundation. One method is the p-y curve, It is a development of the Beam method in the Winkler Foundation.
Penerapan Metode Time Cost Trade Off untuk Optimasi Biaya dan Waktu pada Pengaruh Redesign Struktur Bawah (Studi Kasus: Proyek Pembangunan Klinik Utama Mata Jec Java @Pasuruan Tahap 1) Doris Zhaputro, Moch. Aldy; Darjanto, Helmy; Conytin Nugrahini, Fibria
Journal of Manufacturing in Industrial Engineering & Technology Vol 3 No 2 (2024): Journal of Manufacturing in Industrial Engineering & Technology
Publisher : Universitas Muhammadiyah Surabaya Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/mine-tech.v3i2.24621

Abstract

ABSTRACT An implementation period of construction projects would usually often experience the risk of delays in the project schedule. It can be caused by various obstacles that occur in the field even though the project has begun with careful planning and scheduling. The delay has a direct result in increasing the duration of implementation and also the cost of implementing the project. One way to overcome these delays is to implement acceleration in implementation so that the project can achieve the target as planned. However, it must also be accompanied by consideration of financing factors in order to achieve minimum costs with quality standards that remain achieved. This acceleration can be done, one of which is by adding working hours (overtime). This research took a case study on the construction project of the JEC Java @Pasuruan Eye Clinic Main Clinic Building which experienced obstacles in foundation work, causing delays in project implementation. To overcome the problem of delay, the acceleration of the time needed would be calculated. The method that will be used is the Time Cost Trade-Off, in which the duration of the work is compressed to get a more profitable project implementation period in terms of time (duration), cost, and income. This research implemented the Crashing Program by using an alternative method of adding working hours (overtime). Crashing was carried out on a critical trajectory obtained from the results of network planning analysis in Microsoft Project 2016. The results showed that by applying the Time Cost Trade-Off method with the alternative of adding 4 hours of work (overtime), the optimal duration of the project was 91 days with an optimal cost of Rp 2,072,972,561. Keywords: Time Cost Trade-Off, Program Crashing, Addition of Working Hours.
Penerapan Metode Time Cost Trade Off untuk Optimasi Biaya dan Waktu pada Pengaruh Redesign Struktur Bawah (Studi Kasus: Proyek Pembangunan Klinik Utama Mata Jec Java @Pasuruan Tahap 1) Doris Zhaputro, Moch. Aldy; Darjanto, Helmy; Conytin Nugrahini, Fibria
Journal of Manufacturing in Industrial Engineering & Technology Vol 3 No 2 (2024): Journal of Manufacturing in Industrial Engineering & Technology
Publisher : Universitas Muhammadiyah Surabaya Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/mine-tech.v3i2.24621

Abstract

ABSTRACT An implementation period of construction projects would usually often experience the risk of delays in the project schedule. It can be caused by various obstacles that occur in the field even though the project has begun with careful planning and scheduling. The delay has a direct result in increasing the duration of implementation and also the cost of implementing the project. One way to overcome these delays is to implement acceleration in implementation so that the project can achieve the target as planned. However, it must also be accompanied by consideration of financing factors in order to achieve minimum costs with quality standards that remain achieved. This acceleration can be done, one of which is by adding working hours (overtime). This research took a case study on the construction project of the JEC Java @Pasuruan Eye Clinic Main Clinic Building which experienced obstacles in foundation work, causing delays in project implementation. To overcome the problem of delay, the acceleration of the time needed would be calculated. The method that will be used is the Time Cost Trade-Off, in which the duration of the work is compressed to get a more profitable project implementation period in terms of time (duration), cost, and income. This research implemented the Crashing Program by using an alternative method of adding working hours (overtime). Crashing was carried out on a critical trajectory obtained from the results of network planning analysis in Microsoft Project 2016. The results showed that by applying the Time Cost Trade-Off method with the alternative of adding 4 hours of work (overtime), the optimal duration of the project was 91 days with an optimal cost of Rp 2,072,972,561. Keywords: Time Cost Trade-Off, Program Crashing, Addition of Working Hours.
Co-Authors Abdul Hakam Conytin Nugrahini, Fibria Doris Zhaputro, Moch. Aldy Fausta, Rakha Fibria Conytin Firmansyah, Mochamad fikri firmansyah Fikri Jehlaeh, Fadel Oetomo, Wateno Puntodewo, Setyasto Sutowijoyo, Hendro