Time-varying reliability analysis of Majiagou landslide based on weakening of hydro-fluctuation belt under wetting-drying cycles

Liao, Kang; Wu, Yiping; Miao, Fasheng; Li, Linwei; Yang, Xue

doi:10.1007/s10346-020-01496-2

Cited by 45 publications

(8 citation statements)

References 46 publications

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“…18) show a short period of faster displacement (steep positive gradients, or steps, in cumulative displacement plots), which correspond to the drawdown water and rainfall period. Many published works indicated that the key triggering factors for the slope behaviors of Majiagou landslide is the drawdown operation (Liao et al, 2020;Ma et al, 2017;Zhang et al, 2020a;Zhang et al, 2018), which has also been verified in this section. For example, during the maximum daily This paper has to be cited as (3) Stability change under the effect of fluctuating RWL As for Majiagou landslide, GEOSTUDIO software was used to clarify its seepage and stability variations under the effect of drawdown-filling cycles.…”

supporting

confidence: 72%

Influence of permeability on the stability of dual-structure landslide with different deposit-bedding interface morphology: The case of the three Gorges Reservoir area, China

Luo

Huang

Peng

et al. 2022

Engineering Geology

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supporting

confidence: 72%

Influence of permeability on the stability of dual-structure landslide with different deposit-bedding interface morphology: The case of the three Gorges Reservoir area, China

Luo

Huang

Peng

et al. 2022

Engineering Geology

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“…This fatigue loading further damages the rock structure [25] (2) Mineral dissolution: mineral grains are commonly insoluble in distilled water. However, under atmospheric condition, the calcite will react with distilled water due to the presence of gaseous carbon dioxide as follows [37]: 4 Geofluids…”

Section: Discussionmentioning

confidence: 99%

“…In the pluvial region, rock masses are commonly exposed to cyclic wetting-drying (WD) interactions in many rock engineering applications, such as slope, mining, tunnelling, and underground storage [1][2][3]. The periodic cyclic WD can deteriorate the mechanical characteristics of rocks, which would cause some engineering geological hazards, e.g., ground subsidence, landslide, and mine collapse [4][5][6][7]. Thus, on account of the stability and safety of rock engineering, a deep understanding the deformation and mechanical behavior of rocks exposed to WD cycles is of great significance.…”

Section: Introductionmentioning

confidence: 99%

Degradation of Strength and Stiffness of Sandstones Caused by Wetting-Drying Cycles: The Role of Mineral Composition

2021

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Rock mechanical parameters are of great importance for the construction and design of rock engineering. Rocks are usually subjected to the deteriorating effect of cyclic wetting-drying because of the change in moisture content. The main objective of this study is to reveal the degradation effects of wetting-drying cycles on strength and modulus on varying rocks. Three kinds of sandstones with different mineral constituents are selected for testing. Artificial treatments of cyclic wetting-drying are conducted on respective specimens of the three sandstones (0, 10, 20, 30, and 40 cycles) to simulate the damage of rocks exposed to natural weathering. Uniaxial compressive tests are carried out on sandstone specimens to obtain their strength and modulus. Test results show that, for the tested sandstones, both of the uniaxial compressive strength (UCS) and modulus are reduced as the cyclic number rises. In the first ten cycles, the losses of UCS and modulus are very significant. Subsequently the changes of UCS and modulus become much more placid against cyclic number. When the cyclic number is the same, the loss percentages of rock mechanical properties of the three sandstones are very different which mainly depends on the contents of expandable and soluble minerals.

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“…Numerous researchers have studied the water-holding capacity, strength and deformation characteristics, permeabilitystrength characteristics, and crack evolution law of soil under drying-wetting cycles. At the same time, the relationship between the macro-mechanical characteristics and microstructural characteristics of expansive soil [41][42][43], unsaturated sand [44], sliding zone soil [45,46], compacted loess [47][48][49][50], and clay soil [51][52][53] was evaluated to reveal the intrinsic nature of soil strength attenuation at the microscale. We can also conclude that most of the previous investigations on the SWCC under multiple drying-wetting cycles have focused on slope stability analysis or pollutant migration.…”

Section: Introductionmentioning

confidence: 99%

Influence of Drying–Wetting Cycles on the Water Retention and Microstructure of Residual Soil

Liu

Xian

et al. 2022

Geofluids

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Due to frequent changes in the humid and hot environment, the residual soil with a particle-size distribution (PSD) from gravel to clay experiences multiple drying–wetting cycles. The pressure plate test and nuclear magnetic resonance (NMR) spectroscopy were used to investigate the influence of drying–wetting cycles on the soil–water characteristic curve (SWCC) and pore-size distribution (POSD) of undisturbed residual soil. The results showed that the water-holding capacity of the residual soil decreased as the number of drying–wetting cycles increased and gradually stablilized, and then the van Genuchten (VG) model was found to perform well on the SWCC during the drying–wetting processes. The NMR results indicated a double-pore structure, and the porosity of the residual soil as well as the internal water content increased smoothly with more drying–wetting cycles. The obtained POSD curve of soil implied that drying–wetting cycles had a more obvious effect on small pores and macro-pores than on micro-pores and meso-pores. Theoretical calculations evinced that the product of the matric suction and relaxation time should be constant at a constant temperature. However, the experimental results did not effectively reflect such a relation between the matric suction and relaxation time. A modified VG model based on the cumulative pore volume was utilized to describe the POSD under drying–wetting cycles. Subsequently, the proposed Rational2D surface equation was used to accurately reflect the internal relationship between the SWCC and POSD curve under different numbers of drying–wetting cycles. Moreover, the fractal model for the SWCC derived from the capillary theory confirmed that the matric suction had a strong linear relationship with the relative volumetric water content in the log-log scale. Also, the fractal dimension can be approximated as a constant, because its attenuation is small with more drying–wetting cycles.

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Time-varying reliability analysis of Majiagou landslide based on weakening of hydro-fluctuation belt under wetting-drying cycles

Cited by 45 publications

References 46 publications

Influence of permeability on the stability of dual-structure landslide with different deposit-bedding interface morphology: The case of the three Gorges Reservoir area, China

Influence of permeability on the stability of dual-structure landslide with different deposit-bedding interface morphology: The case of the three Gorges Reservoir area, China

Degradation of Strength and Stiffness of Sandstones Caused by Wetting-Drying Cycles: The Role of Mineral Composition

Influence of Drying–Wetting Cycles on the Water Retention and Microstructure of Residual Soil

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