Papers by Fathiyah Hakim Sagitaningrum
Potential of Bamboo Leaf Ash for Soil Stabilization - Literature Review
IOP conference series. Earth and environmental science, Apr 1, 2024
Interface Shear Strength Degradation in Progressive Landslide of Weathered Clay Shale Overburden on Undisturbed Clay Shale
ASEAN Engineering Journal, Feb 29, 2024
Review of clay shale soil and its future research
AIP Conference Proceedings, Dec 31, 2022
IOP conference series, Oct 30, 2019
A system of ground anchor and horizontal drain on a steep cut-slope in Bogor, West Java was desig... more A system of ground anchor and horizontal drain on a steep cut-slope in Bogor, West Java was designed to stabilize the slope below a bridge structure spanning across a river. Due to the difficulties in the construction of the ground anchor, the design of the ground anchor was evaluated and analyzed for its effect on the stability of the slope. The slope is assumed to have three layers of soil consist of sandy clay (medium stiff), sandy silt (hard), sandy silt (medium stiff), and cemented sand gravel. Four scenarios were evaluated to examine the slope stability: initial stage, the addition of horizontal drain, construction of bored piles with horizontal drain, and addition of ground anchor after the construction of bored piles and horizontal drain. Analysis were done with evaluating the Factor of Safety (FS) of the slope. It was found that the addition of horizontal drain played a big part in stabilizing the slope from initial stage (FS = 0.933 to FS = 1.546), whereas the addition of ground anchor and bored piles were not apparent after the addition of horizontal drain (FS = 1.545 and FS = 1.555), indicating that the main problem of the slope was the high groundwater level. Other than the constructed solutions, shortcrete should also be given at the critical slip surface at the top and surface of the slope in order to reduce erosion by runoff water.
MATEC Web of Conferences, 2018
Landslide in Indonesia, specifically in Java island, occurs during rainy seasons. In Java island,... more Landslide in Indonesia, specifically in Java island, occurs during rainy seasons. In Java island, it is known that the tropical red clay has the ability to stand at steep angles, while in stability analysis due to rainfall, practitioners only consider the rise of groundwater table. Previous studies states that one of the factor affecting factor of safety (FS) for tropical red clay slopes is the formation of saturated zones due to matric suction. This research studies the effect of rainfall intensity and duration to FS of cut-slopes as parametric study with probabilistic analysis for different height of 10m, 20m, and 30m also slope angles of 27 o , 45 o , 55 o , and 70 o. Rainfall parameter are taken from FTUI rainfall station for advanced pattern and three-days duration of rain. Analysis of seepage uses SEEP/W and slope stability uses SLOPE/W. It is known that the significant increase of probability of failure due to the three-days rainfall is achieved at the 10m height and 70 o-angled slope. Increase of the probability of failure is mainly due to rainfall infiltration which saturates the surface and pore water pressure increase until certain time where infiltration stops and turn into surface runoff .
IOP Conference Series: Materials Science and Engineering, 2019
A system of ground anchor and horizontal drain on a steep cut-slope in Bogor, West Java was desig... more A system of ground anchor and horizontal drain on a steep cut-slope in Bogor, West Java was designed to stabilize the slope below a bridge structure spanning across a river. Due to the difficulties in the construction of the ground anchor, the design of the ground anchor was evaluated and analyzed for its effect on the stability of the slope. The slope is assumed to have three layers of soil consist of sandy clay (medium stiff), sandy silt (hard), sandy silt (medium stiff), and cemented sand gravel. Four scenarios were evaluated to examine the slope stability: initial stage, the addition of horizontal drain, construction of bored piles with horizontal drain, and addition of ground anchor after the construction of bored piles and horizontal drain. Analysis were done with evaluating the Factor of Safety (FS) of the slope. It was found that the addition of horizontal drain played a big part in stabilizing the slope from initial stage (FS = 0.933 to FS = 1.546), whereas the addition of ...
Exploring the integration of BIM to civil engineering undergraduate curriculum in Indonesian universities
AIP Conference Proceedings, 2022
Evaluation of Slope Stability at Interface using Thin Soil Material Model in Finite Element Software
IOP conference series, Dec 1, 2022
Lesson Learned from Weathering Clay Shale Residual Interface Shear Strength Testing Method
Lecture notes in civil engineering, Jul 19, 2022
Optimization of soil-nailed wall design can be done with adjustment on parameters and the constru... more Optimization of soil-nailed wall design can be done with adjustment on parameters and the construction elements during the design analysis. As there are many criteria in soil nailing design that could be optimized, this paper focused on three main parameters: length, inclination, and spacing of the soil nail. The aim of this paper is to evaluate the three parameters optimization reanalyses and their cost difference from the original design. The data were collected from a project in Selangor area and were reanalysed using the Morgenstern-Price Method analysis from a Limit Equilibrium software (SLOPE/W). The optimization re-analysis was evaluated with the change of the Factor of Safety (FOS) value for all cases. Results showed that reducing the soil nail length will reduce the FOS, reducing the soil nail inclination will increase the FOS, and reducing the soil nail spacing will increase the FOS. It was also known that the cost reduces from 18% to 53% in the reanalysis which showed tha...
Comparison of online group discussion and class discussion learning for a soil mechanics class
IOP Conference Series: Materials Science and Engineering, 2020
Soil Mechanics had been a fundamental science material that needs a great understanding of the co... more Soil Mechanics had been a fundamental science material that needs a great understanding of the concept. Many attempts had been done in varying the study method for this course. An attempt to utilize online discussion learning will be discussed in this paper. To analyze the online learning experience, the Community of Inquiry (CoI) model was utilized. The CoI model divides the dynamic online learning process as social presence, teaching presence, and cognitive presence. This study aims to compare the application of CoI in the Soil Mechanics course between two different types of discussion under the Civil Engineering Department at a large public university in Indonesia. The students of the Soil Mechanics course were given two types of problem-based online discussions for two learning topics. The first one was a case study of Consolidation Settlement in a Group Discussion, while the second one was a case study of Seepage in a Class Discussion, which was done in one single discussion fo...
IOP Conference Series: Earth and Environmental Science, 2020
A landslide has been one of the many problems in geotechnical engineering, whereas, from one of t... more A landslide has been one of the many problems in geotechnical engineering, whereas, from one of the cases, a failure happened at the interface layer between the overburden and its underlying soil. As interface shear strength has become one of the growing topics in research, this paper summarizes and discusses the research development of interface shear strength and its possibility to explain the interface shear behavior at a slope. The discussion was limited to cohesive soils and experiment-based behavior of the interface shear. Some research has been selected in order to understand the development of interface shear strength through time and two examples of slope interlayer shear behavior were selected. It was known that there are three common tests of interface shear behavior used: simple shear, direct shear, and ring shear test. The development of interface shear strength started at 1960s between soil and construction materials where the four major components were defined. As the...
MATEC Web of Conferences, 2017
Landslide in Indonesia usually occurs during the rainy seasons. Previous studies showed that rain... more Landslide in Indonesia usually occurs during the rainy seasons. Previous studies showed that rainfall infiltration has a great effect on the factor of safety (FS) of slopes. This research focused on the effect of rainfall pattern on the FS of unsaturated slope with different slope angle i.e.: 30°, 45°, and 60°. Three different rainfall patterns, which are normal, advanced, and delayed were considered in the analysis. The effects of low or high hydraulic conductivity of the soil are also observed. The analyses were conducted with SEEP/W for the seepage and SLOPE/W for the slope stability. It is found that the lowest FS for gentle slope is reached under the application of advanced rainfall pattern and the lowest FS for steep slope is reached under the application of delayed rainfall pattern. Reduction of FS is known to be the largest for gentle slope rather than steep slope due to negative pore water pressure reduction and the rising of ground water level. The largest FS reduction caused by rainfall was achieved for gentle slope under advanced rainfall pattern.
MATEC Web of Conferences, 2017
Landslide in Indonesia usually occurs during the rainy seasons. Previous studies showed that rain... more Landslide in Indonesia usually occurs during the rainy seasons. Previous studies showed that rainfall infiltration has a great effect on the factor of safety (FS) of slopes. This research focused on the effect of rainfall pattern on the FS of unsaturated slope with different slope angle i.e.: 30°, 45°, and 60°. Three different rainfall patterns, which are normal, advanced, and delayed were considered in the analysis. The effects of low or high hydraulic conductivity of the soil are also observed. The analyses were conducted with SEEP/W for the seepage and SLOPE/W for the slope stability. It is found that the lowest FS for gentle slope is reached under the application of advanced rainfall pattern and the lowest FS for steep slope is reached under the application of delayed rainfall pattern. Reduction of FS is known to be the largest for gentle slope rather than steep slope due to negative pore water pressure reduction and the rising of ground water level. The largest FS reduction caused by rainfall was achieved for gentle slope under advanced rainfall pattern.
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Papers by Fathiyah Hakim Sagitaningrum