Landslides induced by slaking of geomaterial

Oktaviani, Revia; Rahardjo, Paulus Pramono; Sadisun, Imam A.

doi:10.1051/matecconf/201822903011

Cited by 6 publications

(4 citation statements)

References 8 publications

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“…From Table 3, the results also indicated that water had a significant role in determining the interface failure, where a higher degree of saturation would lower the interface shear strength. Although [16] argued that a higher degree of saturation would give higher interface shear strength of clay interface with concrete, other studies agreed with the current study's results [1][2][3]. Thus, water could be concluded to reduce the interface shear strength dominantly.…”

Section: Thin-soil Interface Soil Model Results Plotted Against Labor...supporting

confidence: 85%

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Evaluation of Slope Stability at Interface using Thin Soil Material Model in Finite Element Software

Sagitaningrum

Kamaruddin

Назир

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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Cases of landslides on clay shale slopes have been an intriguing study in Indonesia. Most of the slopes failed due to the weathering of the clay shale rock. As studies focused on the properties of clay shale, several FEM analyses indicated a unique translational type of failure between the interface of clay shale and its overburden. However, the modeling of the interface in a case study was still limited. This study aims to evaluate a landslide using a thin-soil interface model using FEM software. The model used two conditions, extreme groundwater level conditions. There were several iterations of the shear strength parameters of the interface layer conducted. Results indicated that the thin-soil interface could portray the interface condition at the landslide. Compared to laboratory interface results, the interface would fail at a high degree of saturation due to water infiltration at the surface. Also, granular overburden with high permeability had a higher chance of failure than cohesive overburden. From the results, this study opened the path to incorporating the interface layer in clay shale slope analysis. However, further studies are needed using the thin-soil interface model in other clay shale landslide cases to synthesize its repeatability.

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Section: Thin-soil Interface Soil Model Results Plotted Against Labor...supporting

confidence: 85%

“…Due to weathering, the initial properties of clay shale would change through the degradation of the structure [1]. The degradation of clay shale would further degrade its shear strength, which led to slope instability [2,3]. Various clay shale slope analyses indicated a typical translational failure plane.…”

mentioning

confidence: 99%

Evaluation of Slope Stability at Interface using Thin Soil Material Model in Finite Element Software

Sagitaningrum

Kamaruddin

Назир

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…Based on [10], it conducted a study and field survey that some clay shales in West Java, Indonesia, push some soldier piles and cause a wall collapse. This phenomenon triggers the wall at the toe part and landslide the road, and the culvert breaks, severed by seepage and indicating that the water influences durability.…”

Section: Introductionmentioning

confidence: 99%

Fragmentation Evaluation of Some Selected Mudrock Indiced by Physical and Mineralogical Properties

Misbahudin,

Perdana,

Fatimah

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Not many mudrock in Indonesia have been evaluated for slaking characteristics. Mudrock disintegrates rapidly when interacting with the atmosphere and hydrosphere. This research investigates the fragmentation of slaked claystone from the Kerek Formation. These formations are known for causing road, slope, and land-strengthening engineering problems along Jalan Semarang-Bawen, Middle Java, Indonesia. In this research, the method includes quantitative analysis of rock slaking level, which collides with the physical and mineralogical properties of the rocks. The slaking test with natural exposure for four cycles was carried out on as many as five samples. It is found the durability parameter value for all samples generally shows a slight difference. The durability index and Fragment Size Distribution Ratio in the 4-month cycle may be considered to evaluate the degree of fragmentation of material mudrock. RGL.0708.10 have an average DIR of 11.81%, and RGI.0908.1 is 2.18%. The value of FSDRatio for RGI.0908.2, RGL.0908.1, RGI.0908.1, and RGI.0708.3 is 1.00, whereas RGI.0708.10 is 0.9997. The indices in this research can be projected and considered to be used in another formation sample with engineering problems. The mineralogical composition of smectite minerals does not show a significant relationship to affect the fragmentation of mudrock with R2 .0.268 in month-4 for the DIR and 0.1322 for the FSDRatio . On the microscopic texture of the sample, there is the presence of calcite minerals, and a modest relationship exists between calcite content and its effect on the fragmentation of mudrock with R2 for DR and FSDRatio , respectively 0.6797 and 0.4732. In addition, physical properties such as natural water content highly influence mudrock’s durability with R2 for DIR and FSDRatio , respectively 0.8321 and 0.9023.

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“…Regarding physical properties to durability, Zhang et al (2021) stated that the high intensity of rock's wet and dry cycle will affect the decrease of physical properties such as porosity, density, and fracture toughness. Oktaviani et al (2018) conducted a study and field survey that some clay shales in West Java, Indonesia, push some soldier piles and cause a wall collapse. This phenomenon triggers the wall at the toe part and landslide the road, and the culvert breaks, severed by seepage and indicating that the water influences durability.…”

Section: Introductionmentioning

confidence: 99%

Durability characterization of landslide material from mudrock of Jatiluhur formation

Misbahudin,

Pardede

2023

JDMLM

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The infrastructure project has many lies on the mudrock foundation. Some reports in Hambalang, West Java, Indonesia, state the engineering problem related to landslides and foundation failure due to mudrock material's existence. The mudrock originated from Jatiluhur Formation. The problem is also present in slope stability, such as surface erosion and landslide on the many slopes. Landslide material from mudrock material has easily broken into smaller fragments. This research used the wet-dry cycle to evaluate mudrock's durability to weathering on a laboratory scale. The preparation of the test samples in the form of intact rock with a weight of 450-550 grams and then open exposure under sun dry was conducted. The sample was then immersed in water for 24 hours. ISRM physical properties were conducted and correlated with statistical analyses to determine factors affecting the mudrock's durability. From the index of durability, mudrock in Jatiluhur Formation in this research area had various degrees of disintegration. The siltstone samples remained intact until the 15<sup>th</sup> cycle, unlike shale and claystone samples had expressed low durability and rapid disintegration rate. A series of investigation durability characteristics of mudrock in this study can be applied to other samples and formations that are quantitively and qualitatively.

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Landslides induced by slaking of geomaterial

Cited by 6 publications

References 8 publications

Evaluation of Slope Stability at Interface using Thin Soil Material Model in Finite Element Software

Evaluation of Slope Stability at Interface using Thin Soil Material Model in Finite Element Software

Fragmentation Evaluation of Some Selected Mudrock Indiced by Physical and Mineralogical Properties

Durability characterization of landslide material from mudrock of Jatiluhur formation

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