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Journal : Andalasian International Journal of Applied Science, Engineering, and Technology

Study Comparative Stability of Dam Body with Geomembrane Core Material using GeoStudio Application Unicolas Satria Oktavianus Nainggolan; Tika Ermita Wulandari
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 4 No. 1 (2024): March 2024
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v4i1.105

Abstract

The availability of embankment material and the quality of the material is one of the problems in planning a dam, especially impermeable material which must be watertight. With the GeoStudio application, the dam will be modeled to observe the stability of the dam, especially against landslides and seepage. Modeling I is modeled with core zone material using upstream borrow clay material and modeling II using downstream borrow clay material. Modeling III and IV used the same core material with the addition geomembrane material between the transition zone and the upstream filter. The geomembrane was added to observe and compare the effect of use on the stability. The weir body was analyzed under conditions when the weir body was completed, flood water level, normal water level, low water level and rapid drawndown water condition. Modeling III with upstream borrow clay material and geomembrane between the transition zone and upstream filter is the design with the best stability with the most critical avalanche safety factor of 2.459 downstream of the weir under flood water level conditions. The seepage discharge downstream of the weir is 0.0017 m³/dt/m and the maximum seepage discharge is 0.0026 m³/dt/m under flood water level conditions.
Simulation of Ground Settlement Using Plaxis for the Pekanbaru-Padang Toll Road Construction Project: A Detailed Analysis Saragih, Muhammad Sultan Mubaraq; Wulandari, Tika Ermita
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 4 No. 3 (2024): November 2024
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v4i3.181

Abstract

Geotechnical issues often include settlement and soil bearing capacity, which serve as the foundation for toll roads. Each toll road is designed with specific loads and elevations, which sometimes cannot be supported by the consolidation of the existing soil due to the soft soil characteristics. Soil improvement methods such as replacement (soil material replacement) and preloading are commonly used to enchace the shear strength of soft soils. This analysis aims to evaluate and compare the amount of consolidation settlement analytically using modeling in Plaxis 2D with a very fine mesh type, using settlement plate data from the field. The analysis compares the amount of consolidation settlement through Plaxis 2D modeling with a very fine mesh type and field settlement plate data. From the analysis the consolidation time using Plaxis 2D modeling is found to be 149 days, while the settlement time from the settlement plate data is 39 days. The consolidation settlement obtained from the plaxis 2D model with a very fine mesh is 0.056 meters, whereas the settlement from the settlement plate data is 0.416 meters, with a percentage difference of 86.53%. It can be concluded that the significant difference between the field data and the Plaxis 2D analysis results is due to the lack of data available for each soil layer.
Simulation of Ground Settlement Using Plaxis for the Pekanbaru-Padang Toll Road Construction Project: A Detailed Analysis Saragih, Muhammad Sultan Mubaraq; Wulandari, Tika Ermita
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 4 No. 3 (2024): November 2024
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v4i3.181

Abstract

Geotechnical issues often include settlement and soil bearing capacity, which serve as the foundation for toll roads. Each toll road is designed with specific loads and elevations, which sometimes cannot be supported by the consolidation of the existing soil due to the soft soil characteristics. Soil improvement methods such as replacement (soil material replacement) and preloading are commonly used to enchace the shear strength of soft soils. This analysis aims to evaluate and compare the amount of consolidation settlement analytically using modeling in Plaxis 2D with a very fine mesh type, using settlement plate data from the field. The analysis compares the amount of consolidation settlement through Plaxis 2D modeling with a very fine mesh type and field settlement plate data. From the analysis the consolidation time using Plaxis 2D modeling is found to be 149 days, while the settlement time from the settlement plate data is 39 days. The consolidation settlement obtained from the plaxis 2D model with a very fine mesh is 0.056 meters, whereas the settlement from the settlement plate data is 0.416 meters, with a percentage difference of 86.53%. It can be concluded that the significant difference between the field data and the Plaxis 2D analysis results is due to the lack of data available for each soil layer.
Study Comparative Stability of Dam Body with Geomembrane Core Material using GeoStudio Application Nainggolan, Unicolas Satria Oktavianus; Wulandari, Tika Ermita
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 4 No. 1 (2024): March 2024
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v4i1.105

Abstract

The availability of embankment material and the quality of the material is one of the problems in planning a dam, especially impermeable material which must be watertight. With the GeoStudio application, the dam will be modeled to observe the stability of the dam, especially against landslides and seepage. Modeling I is modeled with core zone material using upstream borrow clay material and modeling II using downstream borrow clay material. Modeling III and IV used the same core material with the addition geomembrane material between the transition zone and the upstream filter. The geomembrane was added to observe and compare the effect of use on the stability. The weir body was analyzed under conditions when the weir body was completed, flood water level, normal water level, low water level and rapid drawndown water condition. Modeling III with upstream borrow clay material and geomembrane between the transition zone and upstream filter is the design with the best stability with the most critical avalanche safety factor of 2.459 downstream of the weir under flood water level conditions. The seepage discharge downstream of the weir is 0.0017 m³/dt/m and the maximum seepage discharge is 0.0026 m³/dt/m under flood water level conditions.