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PENGARUH PERBAIKAN TANAH LUNAK MENGGUNAKAN DEEP MIXING TERHADAP BESARNYA PENURUNAN Mega Dwi Arthaning Tyas; Isnaniati Isnaniati; Dio Alif Hutama
Konstruksia Vol 14, No 1 (2022): Jurnal Konstruksia Vol 14 No. 1 Tahun 2022
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jk.14.1.140-151

Kondisi tanah dasar yang lunak sering menjadi permasalahan pada konstruksi pembangunan suatu bangunan, sehingga apabila tidak dilakukan perbaikan tanah terlebih dahulu, maka tanah dasar akan mengalami penurunan yang relatif besar. Dalam penelitian ini menggunakan metode deep mixing yang dimodelkan sebagai plat untuk meningkatkan stabilitas tanah. Berdasarkan laporan investigasi tanah, lokasi penelitian di kota Banjarmasin termasuk jenis tanah lempung lunak yang berada tepat di tepi sungai Barito didominasi oleh tanah rawa dengan muka air tanah -0,25 m. Penelitian ini bertujuan membandingkan hasil perhitung penurunannya sebelum dilakukan perbaikan tanah dengan deep mixing dan penurunan setelah perbaikan tanah menggunakan deep mixing dengan memberikan variasi modulus elastis deep mixing. Dalam penelitian ini digunakan beban timbunan setinggi 5 m dengan variasi modulus elastis (E= 50000 kPa; 100000 kPa; 200000 kPa), diameter deep mixing 0,6 m; spasi 2,5 m dan total kedalaman yang diperbaiki 17,5m. Hasil penelitian sebelum adanya deep mixing cara analitis diperoleh penurunan konsolidasi (Sc) sebesar 1.99 m dan waktu penurunan (t) sebesar 22.328 tahun pada derajat konsolidasi 90% (U90). Kemudian setelah adanya perbaikan tanah dengan deep mixing pada E= 200000 kPa; diameter 0.6 m; jarak 2.5 m, dengan menggunakan Plaxis 8.6 2D diperoleh penurunan konsolidasi (Sc) sebesar 1.54 m dan waktu penurunan (t) sebesar 0.23 tahun pada derajat konsolidasi 90% (U90). Pemberian modulus elastis (E) yang semakin besar dapat menurunkan nilai penurunan tanah (S), dan pola keruntuhan yang dihasilkan pada analisis dengan plaxis 8.6 terlihat mengalami deformasi pada sekitar daerah timbunan.

Evaluasi Karakteristik Kekuatan Tanah yang Distabilisasi dengan Fly Ash Himatul Farichah; Dio Alif Hutama; Dian Purnamawati Solin
Jurnal Pensil : Pendidikan Teknik Sipil Vol 12 No 3 (2023): Jurnal Pensil : Pendidikan Teknik Sipil
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jpensil.v12i3.37489

High domestic consumption of coal, especially in energy sector, has raised concerns on several environmental issues in Indonesia. Large amount of coal combustion product in the form of solid waste, such as fly ash resulting from coal power plant production causes problems in its disposal since its necessity of land occupancy. Over the last decade, many researchers have put effort to solve this disposal concerns by utilizing these materials for various purposes, such as construction materials as part of circular economy. This paper presents the utilization of fly ash for soil stabilization in Surabaya. Firstly, the index properties of soil samples were determined through a series of laboratory soil test including specific gravity, unit weight, moisture content, sieve analysis and Atterbergâ€™s limit tests. Subsequently, standard proctor test was conducted to obtain the maximum dry density and optimum moisture content of the soil samples. Using those parameters, four types of soil stabilized with fly ash samples were prepared with fly ash content based on weight of soil as follows: 0%, 5%, 10%, and 15%. Finally, unconfined compression tests were performed with cylindrical soil samples to assess the unconfined compressive strength of those samples. The results indicate that soil with fly ash content of 10% showing the highest unconfined compressive strength compared to the other variations of 0.90 kg/cm2.

Numerical Analysis of Soft Soil Improvement using Pile at Airport Construction Project Himatul Farichah; Dio Alif Hutama; Dian Purnamawati Solin
JACEE (Journal of Advanced Civil and Environmental Engineering) Vol 6, No 2 (2023): October
Publisher : Universitas Islam Sultan Agung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30659/jacee.6.2.107-117

Construction on the soft ground poses an excellent challenge for geotechnical engineers. Several engineering problems such as bearing capacity failure and differential settlement could occur either during or after the construction phase due to high compressibility and low shear strength. Nowadays, a number of soil improvement techniques are available to solve such problems. However, each method has its advantages and disadvantages. In this study, soil improvement analysis using pile were performed with three variations depths so called 12 m, 18 m, and 24 m from the ground level. A finite element simulation has been performed using PLAXIS 2D. The pile has been modeled as plate and Mohr-Coulomb model was used for soil model. The results show that the deeper the pile, the settlement will be decreasing. Moreover, the axial force and bending moment of the pile obtained from the output of PLAXIS 2D were also presented to assess the performance of the soil improvement technique.

Penilaian Stabilitas Lereng dengan Perkuatan Akar Menggunakan Analisis Batas Elemen Hingga Hutama, Dio Alif; Farichah, Himatul
Jurnal Pensil : Pendidikan Teknik Sipil Vol. 13 No. 2 (2024): Jurnal Pensil : Pendidikan Teknik Sipil
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jpensil.v13i2.44244

Slope instability poses serious threats to infrastructure and environmental sustainability. As a result, numerous reinforcement techniques have been used as disaster mitigation attempts to prevent slope failure. Among various traditional slope reinforcement methods, the use of vegetion root is more cost-effective and environmentally friendly. This paper presents stability assessment of root-reinforced slopes. Firstly, slope models were built for case of bare and root-reinforced slopes. The slope angles were varied in the range of 15º ~ 55 º. The root cohesion and depth of root zone were adjusted within the ranges of 0 ~ 20 kPa and 0 ~1.5 m, respectively. The strength reduction finite element limit analysis method was applied to evaluate the stability of the slopes in this study. The results indicate that factor of safety increases with the increasing of root cohesion and depth of root zone. The best factor of safety was obtained for the case with root cohesion and depth of root zone of 20 kPa and 1.5 m, respectively. Shear dissipation contours of the slope models also show that root reinforcement reduces shear dissipation energy along the failure surface, consequently lowering the possibility of slope failure.

Overseas Smart City Short Course of Airlangga and International Community Service: The Role of Science and Technology Towards Smart City Fitriani, Nurina; Fatmawati, Fatmawati; Samiaji, Tabina Arqika; Dianbudiyanto, Wahid; Hutama, Dio Alif; Kuncoro, Eko Prasetyo
Journal of Sustainability Perspectives Vol 4, No 2: December 2024
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jsp.2024.21377

The smart city concept emerged as an alternative solution to overcome the negative impacts of urbanization in big cities, based on the concept of sustainable development. A smart city is a city that can utilize human resources, social capital, and modern telecommunications infrastructure to achieve sustainable economic growth and high quality of life through wise management of resources by the government based on community participation. Jombang has not been managed optimally due to a lack of digital exposure and promotion. Based on these problems, the Faculty of Science and Technology, Airlangga University will organize an international community service program in Jombang to introduce culture and tourism in Jombang to the world through international students and transfer knowledge regarding the application of smart tourism to increase tourism promotion in Jombang. This community service program was carried out together with international students who will first be given an introduction and knowledge of the smart city concept and its application at Universitas Airlangga and the City of Surabaya through a short course. Then the students will be invited to visit the tourist and cultural village in Jombang to transfer knowledge to the local community regarding the application of the smart tourism concept to promote tourism potential in Jombang.

Overseas Smart City Short Course of Airlangga and International Community Service: The Role of Science and Technology Towards Smart City Fitriani, Nurina; Fatmawati, Fatmawati; Samiaji, Tabina Arqika; Dianbudiyanto, Wahid; Hutama, Dio Alif; Kuncoro, Eko Prasetyo
Journal of Sustainability Perspectives Vol 4, No 2: December 2024
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jsp.2024.21377

The smart city concept emerged as an alternative solution to overcome the negative impacts of urbanization in big cities, based on the concept of sustainable development. A smart city is a city that can utilize human resources, social capital, and modern telecommunications infrastructure to achieve sustainable economic growth and high quality of life through wise management of resources by the government based on community participation. Jombang has not been managed optimally due to a lack of digital exposure and promotion. Based on these problems, the Faculty of Science and Technology, Airlangga University will organize an international community service program in Jombang to introduce culture and tourism in Jombang to the world through international students and transfer knowledge regarding the application of smart tourism to increase tourism promotion in Jombang. This community service program was carried out together with international students who will first be given an introduction and knowledge of the smart city concept and its application at Universitas Airlangga and the City of Surabaya through a short course. Then the students will be invited to visit the tourist and cultural village in Jombang to transfer knowledge to the local community regarding the application of the smart tourism concept to promote tourism potential in Jombang.

Carbon Capture Potential of Mangrove Ecosystem in Randuboto, Gresik Regency and Its Role in Overcoming Climate Change Fitriani, Nurina; Hutama, Dio Alif; Isnadina, Dwi Ratri Mitha; Pratama, M Bagas Pramudya; Khadijah, Rafiga; Putranto, Trisnadi Widyaleksono Catur
Journal of Sustainability Perspectives Vol 5, No 1: June 2025
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jsp.2025.25634

This study examines the carbon capture potential of mangrove ecosystems, focusing on the Randuboto mangrove conservation area. The total biomass in the area amounts to 172.031 tons/ha, with a carbon storage capacity of 80.855 tons/ha and CO2 capture of 296.738 tons/ha. The sapling stratum, characterized by greater mangrove density, produces higher biomass and accommodates more carbon reserves compared to the mature tree stratum. Avicennia marina is identified as the most significant contributor to biomass, carbon storage, and CO2 absorption. Mangroves, through their dense root systems and photosynthetic processes, trap and store carbon both in their biomass and in waterlogged sediments, where decomposition is slowed. Additionally, tidal exchanges enhance carbon capture by promoting the deposition of organic material, further increasing carbon storage in coastal areas. These ecosystems play a crucial role in mitigating climate change by sequestering large amounts of carbon, protecting coastal habitats, and supporting biodiversity, emphasizing the need for their conservation in climate action strategies.

Inventory of Greenhouse Gas Emissions in the Energy Sector in Gili Iyang Island, Sumenep Regency Using the IPCC 2006 Method Dianbudiyanto, Wahid; Fitriani, Nurina; Shalva, Rezhyta Nahatya; Fatmawati, Fatmawati; Isnadina, Dwi Ratri Mitha; Pratama, M Bagas Pramudya; Rahman, Danar Arifka; Nathanael, Rinaldy Jose; Hutama, Dio Alif
Journal of Sustainability Perspectives Vol 5, No 1: June 2025
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jsp.2025.24041

Global warming comes from many human activities, such as the burning of fossil fuels and the use of energy can produce Greenhouse Gases. The energy sector itself is the largest contributor of greenhouse gases in the world. This study aims to determine the greenhouse gas emissions produced in the energy sector on Gili Iyang Island. To be able to determine the greenhouse gas emissions produced in the energy sector on Gili Iyang Island, the IPCC 2006 calculation method was used. In this method, primary data is needed in the form of data on energy and fuel consumption activities of residents and secondary data in the form of the number of families on Gili Iyang Island. In the stationary source itself, CO2 gas emissions are produced at 1,438,259.9 Kg/Year, CH4 gas at 324.164 Kg/Year, and N2O gas at 12.486 Kg/Year. Meanwhile, moving sources produce CO2 gas emissions of 510,339.1052 Kg/Year, CH4 gas of 191.363 Kg/Year, and N2O gas of 20.969 Kg/Year. As for mitigation actions that can be taken based on its topography and climate, Gili Iyang Island has the potential to use solar panels and biogas as alternative energy and fuel sources to meet daily needs.

Carbon Capture Potential of Mangrove Ecosystem in Randuboto, Gresik Regency and Its Role in Overcoming Climate Change Fitriani, Nurina; Hutama, Dio Alif; Isnadina, Dwi Ratri Mitha; Pratama, M Bagas Pramudya; Khadijah, Rafiga; Putranto, Trisnadi Widyaleksono Catur
Journal of Sustainability Perspectives Vol 5, No 1: June 2025
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jsp.2025.25634

This study examines the carbon capture potential of mangrove ecosystems, focusing on the Randuboto mangrove conservation area. The total biomass in the area amounts to 172.031 tons/ha, with a carbon storage capacity of 80.855 tons/ha and CO2 capture of 296.738 tons/ha. The sapling stratum, characterized by greater mangrove density, produces higher biomass and accommodates more carbon reserves compared to the mature tree stratum. Avicennia marina is identified as the most significant contributor to biomass, carbon storage, and CO2 absorption. Mangroves, through their dense root systems and photosynthetic processes, trap and store carbon both in their biomass and in waterlogged sediments, where decomposition is slowed. Additionally, tidal exchanges enhance carbon capture by promoting the deposition of organic material, further increasing carbon storage in coastal areas. These ecosystems play a crucial role in mitigating climate change by sequestering large amounts of carbon, protecting coastal habitats, and supporting biodiversity, emphasizing the need for their conservation in climate action strategies.

Inventory of Greenhouse Gas Emissions in the Energy Sector in Gili Iyang Island, Sumenep Regency Using the IPCC 2006 Method Dianbudiyanto, Wahid; Fitriani, Nurina; Shalva, Rezhyta Nahatya; Fatmawati, Fatmawati; Isnadina, Dwi Ratri Mitha; Pratama, M Bagas Pramudya; Rahman, Danar Arifka; Nathanael, Rinaldy Jose; Hutama, Dio Alif
Journal of Sustainability Perspectives Vol 5, No 1: June 2025
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jsp.2025.24041

Global warming comes from many human activities, such as the burning of fossil fuels and the use of energy can produce Greenhouse Gases. The energy sector itself is the largest contributor of greenhouse gases in the world. This study aims to determine the greenhouse gas emissions produced in the energy sector on Gili Iyang Island. To be able to determine the greenhouse gas emissions produced in the energy sector on Gili Iyang Island, the IPCC 2006 calculation method was used. In this method, primary data is needed in the form of data on energy and fuel consumption activities of residents and secondary data in the form of the number of families on Gili Iyang Island. In the stationary source itself, CO2 gas emissions are produced at 1,438,259.9 Kg/Year, CH4 gas at 324.164 Kg/Year, and N2O gas at 12.486 Kg/Year. Meanwhile, moving sources produce CO2 gas emissions of 510,339.1052 Kg/Year, CH4 gas of 191.363 Kg/Year, and N2O gas of 20.969 Kg/Year. As for mitigation actions that can be taken based on its topography and climate, Gili Iyang Island has the potential to use solar panels and biogas as alternative energy and fuel sources to meet daily needs.

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