Experimental tests of slope failure due to rainfalls using 1g physical slope models

Chueasamat, Anusron; Hori, Toshikazu; Saito, Hirotaka; Sato, Tomotaka; Kohgo, Yuji

doi:10.1016/j.sandf.2018.02.003

Cited by 63 publications

(23 citation statements)

References 24 publications

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“…The arrow in the figures expressed the flow direction and size. According to Chueasamat et al (2018), rainwaters infiltrated to the foundation (DL clay layer) almost directly before the failure occurred.…”

Section: Results Of Pore Water Pressure In Cases 3-6mentioning

confidence: 99%

“…At first, the verifications of the consolidation analysis method were evaluated by simulating the slope model experimental tests with and without gabions (Tokoro et al, 2012, Chueasamat et al, 2018.…”

Section: Methodsmentioning

confidence: 99%

“…The experimental results of pore water pressures (Tokoro et al, 2012, Chueasamat et al, 2018 and simulations results were first compared (Fig. 5).…”

Section: Verifications Of Analysis Methodsmentioning

confidence: 99%

“…Pore water pressures at the toes then became positive (e.g. Orense et al, 2004;Tokoro et al, 2012, Chueasamat et al, 2018.…”

Section: Introductionmentioning

confidence: 99%

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Performance of filter gabion with pipe as a simple countermeasure against slope failures due to torrential rainfalls

Cho

Chueasamat

Saito

et al. 2019

JGS Special Publication

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Sediment disasters become more serious and most of the sediment disasters of the natural slopes are due to shallow surface failures. The surface layers normally consist of sand or sandy soils. In order to clarify the mechanism of the surface failures, we have conducted a series of model tests. It was found from the model tests as the rainwaters were accumulated at the toes of the slopes, they triggered slope failures. It is important to drain promptly the accumulated rainwaters from the surface layers in order to prevent the large surface failures. Filter gabions with pipes placed at the toes of the slopes were introduced. The objective of this paper is to evaluate the performance of the filter gabions with pipes to prevent surface failure. The investigations were conducted by using the saturated and unsaturated consolidation analysis method with an elastoplastic model considering two suction effects. At first, the consolidation analysis method was verified by simulating slope model experimental tests with and without filter gabions. The analyses of the slope models with filter gabions having drainage pipes installed were then performed. Four cases with different pipe lengths were analyzed. More reductions of pore water pressures (PWPs) were observed as the pipe lengths increased. In the case with the longest pipe installed, the failure prevention performance was the largest.

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Section: Results Of Pore Water Pressure In Cases 3-6mentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…The experimental results of pore water pressures (Tokoro et al, 2012, Chueasamat et al, 2018 and simulations results were first compared (Fig. 5).…”

Section: Verifications Of Analysis Methodsmentioning

confidence: 99%

“…Pore water pressures at the toes then became positive (e.g. Orense et al, 2004;Tokoro et al, 2012, Chueasamat et al, 2018.…”

Section: Introductionmentioning

confidence: 99%

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Performance of filter gabion with pipe as a simple countermeasure against slope failures due to torrential rainfalls

Cho

Chueasamat

Saito

et al. 2019

JGS Special Publication

Self Cite

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“…Rainfall will induce landslides and change the physical and mechanical parameters of slope rock and soil. Due to the softening effect of rainwater, the rock and soil will become saturated, the gravity density will increase, and the shear strength and deformation modulus will decrease [26]. The continuous interaction of water and rock will cause cracks in the rock mass to expand and penetrate, eventually leading to rock destruction and slope instability.…”

Section: Rock Sample Selectionmentioning

confidence: 99%

Effect of Dry-Wet Cycling on the Mechanical Properties of Rocks: A Laboratory-Scale Experimental Study

et al. 2018

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Taking Nanfen open-pit iron mine in Liaoning Province as the engineering background, this study analyzes the effect of water-rock circulation on the mechanical properties of rock through a combination of macro-mechanical experiments and microstructure tests in the laboratory. Uniaxial compression experiments and acoustic wave tests are used to determine the degradation law of the mechanical properties of chlorite under the periodic action of water. The experimental results show that dry-wet cycles have a continuous and gradual effect on the rock sampled: Its uniaxial compressive strength, elastic modulus, and acoustic velocity all decrease gradually with an increase in the number of cycles. After 15 wet-dry cycles, the uniaxial compressive strength and elastic modulus of the rock decreased by 34.21% and 44.63%, respectively. Electron microscope scans of the rock indicate that the particle size, characteristics, and pore distribution at the rock surface had changed significantly after water-rock interaction. Finally, a drainage system and sliding force monitoring devices have been arranged at the mine site that can effectively reduce the impact of water-rock interaction on the stability of the mine. This combination of macro-experiments and micro-analysis allowed the weakening effect of dry-wet cycles on slope rock to be studied quantitatively, providing a theoretical reference for stability evaluation in geotechnical engineering.

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An improved method for measuring wetting front advancing velocity

Liu

et al. 2021

Soil Science Soc of Amer J

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The unsaturated soil hydraulic conductivity function is one of the keys to solving unsaturated seepage issues. The wetting front advancing method (WFAM) is a proposed method for quickly measuring the coefficient of permeability of the unsaturated soils, but it has some demerits and limitations. In this study, a series of capillary rise tests were conducted and the coefficient of permeability of six kinds of unsaturated soils were obtained by using the WFAM. Based on the analyzing of characteristic changes in volumetric water content via soil moisture sensors in the capillary rise test, improvements were made to the method of determining the wetting front advancing velocity. The RMSE evaluation index was used to analyze the deviation of the data obtained by the improved method from the original visual method. The RMSE of the wetting front advancing velocity ranged from 0.0007 to 0.0074 cm s -1 , and the RMSE of the coefficient of permeability ranged from 0 to 5.2 × 10 -6 m s -1 . The results indicated the applicability of the improved method.

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Experimental tests of slope failure due to rainfalls using 1g physical slope models

Cited by 63 publications

References 24 publications

Performance of filter gabion with pipe as a simple countermeasure against slope failures due to torrential rainfalls

Performance of filter gabion with pipe as a simple countermeasure against slope failures due to torrential rainfalls

Effect of Dry-Wet Cycling on the Mechanical Properties of Rocks: A Laboratory-Scale Experimental Study

An improved method for measuring wetting front advancing velocity

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