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Astonjadro
Published by Universitas Ibn Khaldun Bogor
ISSN : 23024240     EISSN : 26552086     DOI : http://dx.doi.org/10.32832/astonjadro
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
Astonjadro: Jurnal Rekayasa Sipil adalah jurnal ilmiah dibidang teknik sipil p-ISSN : 2302-4240 dan e-ISSN : 2655-2086. Jurnal Rekayasa Sipil Astonjadro diterbitkan untuk mengapresiasi dan memberikan informasi ilmiah bagi peneliti, dosen serta para profesional. termasuk dalamnya pengembangan model dan konsep penelitian yang mengacu secara berkesinambungan. Jurnal Astonjadro diterbitkan oleh Fakultas Teknik dan Sains Universitas Ibn Khaldun Bogor, terbit dua kali dalam satu tahun yaitu bulan Juni dan Desember.
Arjuna Subject : Teknik (semua kategori) - Teknik Sipil dan Struktur
Articles 507 Documents
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Analysis of Upstream Citarum Watershed Flow Using Semi-Distributed Hydrology Model with SWAT Chalid, Abdul; Nugraha, Adi Setya; Agung, Prasoni
ASTONJADRO Vol. 14 No. 1 (2025): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v14i1.16510

Abstract

The large conversion of forests’ areas that have a significant spatial impact on the area causes an increase in annual sediment rates that exceed 100 tons/km2. This build up of sediment has the potential to reduce the rivers capacity to handle large intensity rainwater. This research aims to find out how reliable the Semi-Distributed model with the Soil and Water Assessment Tool (SWAT). The SWAT model is when applied to the Upper Citarum watershed (UCW). The results of simulations carried out for one year showed a maximum flow discharge of 441 m3/sec and a minimum flow discharge of 2.15 m3/sec. However, based on existing water estimation post data, the maximum observed discharge value is 460 m3/sec and the minimum observed discharge is 4.06 m3/sec. After calibrating the discharge from the simulation results of the SWAT method with the observed discharge, we obtained quite good results with NSE value > 0.56, which value indicates that the SWAT model has good results. Meanwhile, the R value ≥ 0.79. In other words, the SWAT method of flow discharge modeling can be applied and can be one of the method choice for generating discharge in the UCW.
Analysis of Soil Layer Characteristics on PT. Mining Roads Vale Indonesia Bahudopi Morowali Site Based on Cone Penetration Test (CPT) Mahmud, Amir; Gusty, Sri; Chaerul, Muhammad
ASTONJADRO Vol. 14 No. 1 (2025): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v14i1.16515

Abstract

The location of this research was carried out in the mining concession area of PT. Vale site Bahudopi at 22 observation points. This research aims to analyze the characteristics of the soil and rock layers of the research area based on the Cone Penetration Test (CPT). The location of this research was carried out in the mining concession area of PT. Vale site Bahudopi at 22 observation points (Figure 1). The method used in this research is descriptive quantitative, namely, research that describes the conditions of a particular project with existing data, where the results obtained are data in the form of numbers. Meanwhile, data analysis uses quantitative descriptive analysis methods. The characteristics of the soil and rock layers of the research area based on the Cone Penetration Test (CPT) are: In the CPT data group in the northern part, it can be seen that the majority of rocks up to a depth of 4 meters have quite low friction sleeve and cone resistance values, namely below 20 kg/cm2. which indicates that the soil thickness is quite high in most parts of the area. In the CPT data group in the Southern part, it can be seen that the majority of rocks can be seen to have experienced several changes in hardness or pressure values, which can be seen from changes in qc and fs/FR values. From this, it can be concluded that the soil around the CPT data collection area is not homogeneous but still shows a tendency to be composed of the same type of rock but differs in friction sleeve and cone resistance values which could be caused by a high level of weathering so that the composition of the soil layers /soil is quite thick.
Identifying Critical Success Factors in Implementing Green Building, Case Study: Medium-sized Construction Companies in East Java, Indonesia Arwani, M Hamizan Najib; Negara, Kartika Puspa; Setyowulan, Desy
ASTONJADRO Vol. 14 No. 1 (2025): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v14i1.16800

Abstract

The construction industry is a significant consumer of natural resources and a contributor to environmental issues and ecological instability. This has led to the emergence of sustainable programmes (green construction) which aim to minimise the impact of development projects. The objective of this study is to identify the critical success factor in implementing green construction and to the extent of familiarity among middle-sized companies in the province of East Java with the implementation of green construction projects and to ascertain the factors that affect the success of such projects. The case study subjects are four medium-sized construction companies in East Java that have experience in implementing green building projects. The data obtained will be analysed on mean using IBM SPSS software on each variable. The results will identify the top five critical success factors based on questionnaires distributed to respondents. The findings of critical success factors are as follows: Integrated planning and/or design, Adequate project funding sources (smooth payments), Classification/capabilities of implementing contractors, Effective communication among stakeholders, Competence and experience of the project manager, and last critical success factor is Applicable policies/regulations regarding green construction. These findings are expected that this research will contribute to a deeper understanding of the critical factors that influence success in implementing green construction projects.
Analysis of Secondary Local Road Conditions Using the Surface Distress Index (SDI) Method in Medan Amplas District Lubis, Edo Rizki Pradana; Hasibuan, Gina Cynthia Raphita; Anas, M. Ridwan
ASTONJADRO Vol. 14 No. 1 (2025): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v14i1.16884

Abstract

Road network data and information and spatial supporting infrastructure are important to a road database management planning process. Medan Amplas District, Medan City has a road network divided into national authority roads, provincial roads and city roads, which is 143.14 km. The study area in this research is a flexible pavement-type secondary local road with a length of 33.12 km. The method used in this research is the Surface Distress Index (SDI) Method. SDI divides road conditions into 4, namely good condition, moderate condition, lightly damaged condition and heavily damaged condition. According to RCS or SKJ 2011, there are only 4 elements that are used as support for calculating the SDI value, namely % crack area, average crack width, number of holes, and average rutting depth. From the results of the analysis of the level of road damage in secondary local roads with flexible pavement type in Medan Amplas District, namely 51 road sections in good condition (98%) and 1 road section in fair condition (2%). It can be concluded that the condition of Secondary Local roads in Medan Amplas District is in good condition and only requires routine maintenance at certain points on each road section. The condition of the Secondary Local roads in Medan Amplas District using the SDI Method is in Good Rating, but the Denai River Inspection Road section has a rating of moderate damage.
Assesment of Enviromentally Friendly Transportation to Achieve Sustainable Transportation in Semarang City Firdaus, Aditya Zulfikar; Kurniati, Rina
ASTONJADRO Vol. 14 No. 1 (2025): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v14i1.17062

Abstract

Transportation is the main infrastructure that has a role in driving the economy. The transportation sector can also be a problem if mobility is not accompanied by the availability of adequate infrastructure. Semarang City has the highest number of vehicles compared to other cities or regencies in Central Java Province. Based on data from BPS Semarang City, the number of motorized vehicles in Semarang City in 2021 reached 1,875,781 vehicles with the growth of motorized vehicles increasing by 12% every year. The high number of motorized vehicles in Semarang City causes congestion, air pollution and increases fuel consumption. Semarang City has started to initiate and design an environmentally friendly transportation system that leads to green transportation. The concept of green transportation is an environmentally friendly and sustainable transportation that aims to reduce vehicle emissions and create road space for pedestrians and bicycles. This is in line with the mission of Semarang City in realizing quality infrastructure that is environmentally sound and sustainable. The purpose of this study is to examine the implementation of green transportation that has been carried out in Semarang City in achieving sustainable transportation. This research uses a qualitative approach, This research uses a qualitative approach, while the analysis is carried out by descriptive analysis as well as scoring and weighting analysis so as to obtain the results of the value of the application of environmentally friendly transportation that leads to the concept of green transportation. The results obtained show that Semarang City in implementing environmentally friendly transportation that leads to green transportation has been quite good or quite successful.
Study of the Physical, Environmental, and Economic Sustainability of Purwosari Agrotourism in Semarang City Azmi, Hafzhi Nur; Rahmanda, Taufan
ASTONJADRO Vol. 14 No. 1 (2025): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v14i1.17076

Abstract

Agrotourism has been one of the most rapidly developing sectors in the last two decades and is predicted to continue growing in the future. The pandemic is claimed to have had no significant impact on the development and growth of the agrotourism sector. However, Agrotourism Purwosari, a leading agrotourism destination in Semarang City, has not yet optimized its potential. This is indicated by suboptimal management and various restrictions during the pandemic that have decreased its performance. These challenges have the potential to disrupt the sustainability of agrotourism. This study aims to examine the sustainability of agrotourism with a focus on Agrotourism Purwosari, which is managed by the Semarang City Agriculture Office. This research uses a mixed-methods approach, including descriptive statistical analysis to identify the characteristics of agrotourism, and scoring analysis to assess sustainability efforts through a questionnaire distributed to all managers. Additionally, a qualitative descriptive analysis was conducted through in-depth interviews with four key actors. Based on the analysis, it is found that Agrotourism Purwosari is classified as Moderately Sustainable (3.37), with social and cultural sustainability being quite dominant, but still weak in business performance sustainability.
Study of Mechanical Behavior of Expansive Clay due to the Addition of Nano Silica Dioxide (SiO2) Hirwo, N.T.; Pratikso, Pratikso; Karlinasari, R.
ASTONJADRO Vol. 14 No. 1 (2025): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v14i1.17079

Abstract

Expansive clay which is a problematic soil is spread almost all over the world, including Indonesia. In various regions in Indonesia, expansive clay has damaged the infrastructure above, causing high maintenance costs. Expansive clay often becomes a problem when infrastructure is built on it, due to its large swell and shrink properties. Improved stabilization of expansive clay is required to improve mechanical behavior (shear strength, compressive strength and modulus of elasticity). In this study, the effect of increasing shear strength, unconfined compressive strength and modulus of elasticity of expansive clay added with SiO2 nano material will be investigated. SiO2 nanomaterial can be produced from processing waste from geothermal power plants. The percentage of SiO2 nanomaterial mixture used in this research is 0%; 1%; 2% and 3% compared to dry soil weight. The increase in shear strength, unconfined compressive strength and modulus of elasticity will affect the mechanical behavior of expansive soil. This increase in mechanical behavior also means increasing the bearing capacity of the soil and this is very influential in stabilizing expansive clay. From laboratory substantiation that have been carried out, the laboratory test results show an increase in modulus of elasticity of 17%. An increase in shear strength of 64% and an increase in UCS stress of 91%, which occurs at the optimum mixing nano SiO2 ratio.
The Characteristics of Trans Metro Deli Bus Passengers in Medan Fitri, Fadilla; Hasibuan, Gina Cynthia Raphita; Anas, M. Ridwan
ASTONJADRO Vol. 14 No. 1 (2025): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v14i1.17174

Abstract

As the government’s response to the areas in developing countries, they took steps to reform the existing public transportation service system, one of which is by implementing the Trans Metro Deli (TMD) bus system, a revolutionary public transportation system. Intended to improve mobility and reduce congestion, TMD has become a symbol of transformation in urban transportation in Medan. TMD strives to provide reliable, affordable, and efficient public transportation services for Medan residents. The purpose of this study is to analyze the existing conditions of Trans Metro Deli buses and the characteristics of passengers by using questionnaires and descriptive analysis. The research results show that the existing conditions based on the Minimum Service Standards (Standar Pelayanan Minimal PM 27 Tahun 2015) regarding security, safety, and comfort are respectively 66,66%; 56,25%; and 72,72% which means that the existing conditions of the Trans Metro Deli bus have not been complied 100% based on the Minimum Service Standards PM 27 of 20115 (Standar Pelayanan Minimal PM 27 Tahun 2015). The results of the descriptive analysis study for the characteristics of passengers who use the Trans Metro Deli buses, based on gender which is 80% female, resides in Medan is 88%, are aged 15-25 years old is 78%, employment is 82% students, in-family roles as children is 90%, none ownership of vehicle is 49%, income < Rp500.000 is 49%, travel origination of house/boarding house/rent house is 61%, travel destination is 42% school/college, travel frequency 2 times per day is 53%, travel frequency 26-30 times per month is 38%, travel mode from the origin to the bus stop by walking is 37%, travel mode from the bus stop to the destination by walking is 52%, travel distance from the origin to the bus stop > 400 meter is 33%, travel distance from the bus stop to the destination > 400 meter is 37%, 15-30 minutes travel time by Trans Metro Deli bus is 37% , < 15 minutes travel time from the origin to the bus stop is 65%, < 15 minutes travel time from the bus stop to the destination is 33%, travel cost from the origin to the bus stop Rp2000 – 4000 is 45%, and travel cost from the bus stop to the destination Rp2000 – 4000 is 43%.
Review of Cultural Preservation Theory in Cultural Heritage Sustainability Case Study of Peliatan Ubud Palace Salain, Nyoman Ratih Prajnyani; Putra , I Dewa Gede Agung Diasana; Dwijendra , Ngakan Ketut Acwin; Susanta, I Nyoman
ASTONJADRO Vol. 14 No. 1 (2025): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v14i1.17183

Abstract

This research aims to review cultural preservation theory in the context of cultural heritage sustainability with a case study of Peliatan Palace in Ubud, Bali. The intended conservation theory is a theory by Sendjaja which consists of Culture Experience and Culture Knowledge. Peliatan Palace is one of the cultural heritage sites in Bali which is still preserved today and has high historical and cultural value. This research uses qualitative methods with a case study approach to reveal how cultural preservation is carried out at Peliatan Palace and the factors that influence the sustainability of this cultural heritage. The research results show that cultural preservation at Peliatan Palace is carried out through various efforts, including maintaining the traditional architecture of the castle, carrying out traditional ceremonies, and active involvement of local communities in cultural activities. Internal factors such as the commitment of the Palace family and external factors such as government support and tourism play an important role in maintaining cultural preservation at Peliatan Palace. Apart from that, adapting to current developments without eliminating traditional values ​​is also the key to maintaining the cultural heritage of this castle. This research concludes that cultural preservation at Peliatan Palace is not only important for maintaining local cultural identity but also having a positive impact on community welfare and the promotion of Balinese culture on the international stage. Sustainable and adaptive preservation efforts to changing times are needed to ensure that future generations can enjoy this cultural heritage.
Study of Behaviour Swelling Potential of Expansive Soil on Swelling Test With Cycles of Loading and Unloading Andi, Hasyim Dhafirozi; Rahayu, Wiwik
ASTONJADRO Vol. 14 No. 1 (2025): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v14i1.17199

Abstract

Expansive soil has the characteristic to swell and shrink that are capable to cause crack on the highways surface. The swell and shrink behaviour of expansive soil are influenced by several factors, one of those is surcharge. Surcharge in highways road are traffic loads. To determine the form of behaviour caused by surcharge on expansive soil, the number of loading and unloading were performed on the oedometer test with the swelling pressure as the maximum stress of each cycles. The purpose of this study to investigate the behaviour of swelling potential of expansive soil of each cycles. The results shown that the sample with lowest moisture content exhibited the largest swelling in primary phase and the lowest in secondary phase. The initial swelling potential presented that sample with lowest moisture content did not always swell larger than the sample with higher moisture content. As the number of loading and unloading cycles increased, the swelling potential of all the samples performed similar behaviour. The most significant change of swelling potential occurred from zero to first cycle. After first cycle, the difference of swelling potential tended to similar. This indicated that all the samples tended to reach the stable conditions. The most influence factors that caused swelling potential decreased with increasing number of cycles were the threshold stress and the swelling pressure. The threshold stress caused expansive soil experienced irreversible deformation. While the swelling pressure caused larger swelling in the beginning of the unloading phase due to repulsive force.

Page 41 of 51 | Total Record : 507

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