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All Journal BENTANG : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Indonesian Journal of Environment and Sustainability Issues
Arief Andriansyah
Jurusan Teknik Sipil FT. UNDIP Jl. Prof. H. Soedarto, SH., Tembalang, Semarang 50275
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Environmental Science Transportation

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Slope Stability in Gombel Lama: A Comparative Analysis of Peak, Fully Softened, and Residual Conditions Andriansyah, Arief; Mulyono, Muhammad Nafi’; Aulia, M. Rafi
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 13 No 2 (2025): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil (July 2025)
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v13i2.10819

Abstract

Landslide could be incident that bring a lot of loss, as an example was fatalities and public activity would be disturb. It makes engineers to can identify a slope condition and evaluated what is most effective soil reinforcement necessary. Semarang has several of topography, one of them is Gombel Lama. Gombel Lama was formed ramp which has precipitous slope. The research aim of identificate slope soil parameter in several conditions, as peak, fully softened, and residual. To determine slope safety factor of Gombel lama, researchers does two types of soil investigastion. There are field investigation, they were Standart Penetration Test and Inclinometer and laboratory investigation , that was Direct Shear Test. From field investigation data, it done soil stratification. Furthermore, it combined with Direct Shear Test’s result, researchers use Plaxis LE to make slope stabilities simulation so that assign safety factor of slope is 2.39 (peak), 1.21 (fully softened), 0.53 (residual), and 0.87(average between fully softened and residual). The research result assign that safety factor of slope was decreased while fully softened and residual conditions. Therefore, it is determination of soil reinforcement design not only use peak soil parameter, but also have to heed soil parameters of fully softened and residual conditions.
Evaluating Enviromental Mitigatio and Sustainability Practices in the Construction of the Trans-Sumatera Toll Road Andriansyah, Arief; Abduh, Ridwan M; Paramita, Galuh
Indonesian Journal of Environment and Sustainability Issues Vol. 1 No. 2 (2024): December 2024 | Indonesian Journal of Environment and Sustainability Issues
Publisher : WISE Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70211/ijesi.v1i2.171

Abstract

The construction of the Trans-Sumatera Toll Road, part of Indonesia’s National Strategic Projects (PSN), offers significant economic benefits but also poses environmental challenges, particularly air pollution from construction activities. This study evaluates air quality deterioration due to heavy machinery use, material transportation, and excavation. A quantitative approach was employed through field surveys, environmental monitoring, and laboratory analysis. Air quality monitoring was conducted at eight locations using Graseby Dust Samplers and Gas Impingers to measure PM₁₀, PM₂.₅, SO₂, NO₂, CO, and HC, following Government Regulation No. 41/1999. Results indicate that PM₁₀ levels (22 µg/Nm³) remained within regulatory limits, while CO (578 µg/Nm³) and NO₂ (35.6 µg/Nm³) fluctuated with construction intensity. Mitigation strategies such as water spraying and project vehicle management effectively reduced dust and gas emissions. Continuous monitoring is essential to minimize air pollution impacts. This study provides empirical data to support sustainable infrastructure development, balancing economic benefits with environmental conservation.
Co-Authors Abduh, Ridwan M Aulia, M. Rafi Mulyono, Muhammad Nafi’ Paramita, Galuh