Response mechanism of post-earthquake slopes under heavy rainfall

Qiu, Hong-zhi; Jiming, Kong; Wang, Renchao; Cui, Yun; Huang, Sen-wang

doi:10.1007/s10950-017-9641-9

Cited by 10 publications

(5 citation statements)

References 16 publications

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“…Most studies applying the flume apparatus are linked to shallow landslides triggered by rainfall [15,130] and granular flows [131]. For instance, Qui et al [132] conducted laboratory flume tests to clarify the influence of rainfall duration and intensity on static and seismically exposed slopes. However, some authors design and construct customised physical modelling apparatus to investigate slope failure problems.…”

Section: Flume Tests and Other Physical Testing Apparatusmentioning

confidence: 99%

A Systematic Review of Physical Modelling Techniques, Developments and Applications in Slope Stability Analyses

Haundi,

Okonta

2024

Indian Geotech J

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An extensive evaluation of published articles suggests a lack of research on a systematic literature review relating to physical modelling techniques, developments and application in slope stability studies. However, there is growing interest in using physical model tests in slope stability investigations. The present study systematically reviews the methodologies and applications of physical modelling in slope stability research. The Scopus database was used to identify relevant studies which employed physical model tests in slope stability investigations. A combination of fifteen keywords was used to identify relevant articles. A PRISMA-P method for conducting a systematic review was adopted. Articles were screened and analysed, and extracted data were re-organised using an Excel sheet. Data relating to research objectives, physical model test techniques, instrumentation, scaling laws, numerical modelling, results, and findings were extracted and analysed. The systematic review highlights gaps requiring further studies, particularly in slope reinforcements using vegetation and strength deterioration of reinforcements performance under repeated loading exposures. It is found that scholars have not fully addressed the influence of loss of water on pore water regimes and its impact on stability when vegetation is applied as reinforcements. It is also found that the development of slope materials for soil slopes in physical model tests relies on the artificial development of such materials with minimal consideration of their long-term behaviour. Although other options, such as bio-cementation and desiccation techniques, which simulate the natural environment of the slopes, are neglected in slope material development, the present study recommends that future studies consider such techniques.

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Section: Flume Tests and Other Physical Testing Apparatusmentioning

confidence: 99%

A Systematic Review of Physical Modelling Techniques, Developments and Applications in Slope Stability Analyses

Haundi,

Okonta

2024

Indian Geotech J

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“…Mathematical Problems in Engineering affect each other to form a whole system. is interaction is the coupling relationship [34]. e coupled analysis of the stress field and seepage field of reinforced earth slope is receiving more and more attention in geotechnical engineering.…”

Section: Simulation Models and Simulation Proceduresmentioning

confidence: 99%

Study on the Stability of the Geogrids-Reinforced Earth Slope under the Coupling Effect of Rainfall and Earthquake

Zhang

Huang

Hou

et al. 2020

Mathematical Problems in Engineering

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This paper focuses on understanding the dynamic response problem of flexible wrapped reinforced Earth slope under the coupling effect of earthquake and rainfall; a numerical calculation model of reinforced Earth slope considering the coupling effect of earthquake and rainfall was established. The dynamic response, pore pressure, and tensile stress distribution of the reinforcement under the rainfall before earthquake, the rainfall after the earthquake, and earthquake-rainfall are studied. The results show that the coupling effect of earthquake and rainfall is an influential factor in the dynamic analysis of reinforced Earth slopes, the analysis of which should be paid attention to and researched in the future. The combination of geogrid and soil effectively improves the deformation of the slope and the overall stability, reduces the secondary disaster of the slope, and provides a reference for the seismic construction design of the reinforced Earth slope.

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“…When rainwater enters a cracked soil on a sloping surface, it flows in the network of cracks and seeps into the soil matrix and finally can influence hillside hydrology [1,2]. As water moves in the network of cracks, there is an increase in the lateral flow rate through the soil as compared to flow through intact soils [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…Five 3D soil and groundwater flow and substance transport models were found that simulate preferential flow and transport, including HILLFLOW [36], TOUGH2 [37], HYDRUS-3D [38], MIKE-SHE [12,13], and a model by Laine-Kaulio et al [39]. In addition, Blessent et al [40] used the FRAC3Dvs numerical model to compare the dual porosity, equivalent porous medium, and the discrete fracture matrix diffusion conceptual model, and the study has an important role in decision-making for groundwater-related issues, while the research focus is the 2 Geofluids groundwater and the three models do not consider the surface runoff movement. Although soil swelling and shrinkage models have been included in several earlier models, most notably in FLOCR [41], MACRO [42], and SWAP [43], they are all limited to 1D or quasi 2D simulations.…”

Section: Introductionmentioning

confidence: 99%

“…Although soil swelling and shrinkage models have been included in several earlier models, most notably in FLOCR [41], MACRO [42], and SWAP [43], they are all limited to 1D or quasi 2D simulations. Water movement and solute transport in cracked soil have been widely investigated in the fields of geotechnical engineering, agriculture, and environmental sciences [1,2]. The permeability of cracked soil is highly anisotropic due to the cracks.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental and Numerical Investigations of Influence on Overland Flow and Water Infiltration by Fracture Networks in Soil

Zhu

Fan

et al. 2018

Geofluids

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Preferential flow is common in clay or expansive clay soils, involving water bypassing a large portion of the soil matrix. Dye tracer experiment and numerical modeling are used to simulate the surface runoff and subsurface preferential flow patterns influenced by the soil fracture network of a relatively steep hillslope system (slope angle equals to 10 degrees). The result of the experiments indicates that part of the water is infiltrated through cracks, leading to the delay of the initial runoff-yielding time and reduction of the discharge of the surface runoff. The soil water flow is mainly in the matrix when the intensity of precipitation is low. With the increasing of precipitation, soil water movement may become in the form of preferential flow through cracks. In addition, the nonuniformity of soil water infiltration and the depth of the average water infiltration increase as the precipitation intensity increases. To this end, the complete coupling model was established by using the surface-matrix-crack (SMC) model to simulate water flow within discrete fracture as well as to simulate water flow in the soil matrix based on the concept of dual permeability using the traditional Richards' equation. In this model, the "cubic law" of fluid motion in cracks within smooth parallel plates and the two-dimensional diffusion wave approximation to Saint-Venant equations with momentum term ignored (two-dimensional shallow water equations) were used. The model divides soil water infiltration into two forms and uses the overall method to calculate the exchange of water between the crack networks and matrix regions as well as the exchange water between surface runoff and infiltration water. Results indicate that the SMC model has better performance compared with the traditional equivalent continuum model when those models are used to simulate the surface runoff movement and the soil water movement in the presence of cracks.

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Response mechanism of post-earthquake slopes under heavy rainfall

Cited by 10 publications

References 16 publications

A Systematic Review of Physical Modelling Techniques, Developments and Applications in Slope Stability Analyses

A Systematic Review of Physical Modelling Techniques, Developments and Applications in Slope Stability Analyses

Study on the Stability of the Geogrids-Reinforced Earth Slope under the Coupling Effect of Rainfall and Earthquake

Experimental and Numerical Investigations of Influence on Overland Flow and Water Infiltration by Fracture Networks in Soil

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