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Stability analysis of layered slopes in unsaturated soils

Guangyu DAI; Fei ZHANG; Yuke WANG

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 3,   Pages 378-387 doi: 10.1007/s11709-022-0808-2

Abstract: This study presents stability analyses of layered soil slopes in unsaturated conditions and uses a limitAn example of a two-layered slope in clay and silt is selected to verify the used method by comparingresults show that larger suction stress provided in unsaturated clay dominates the stability of the layeredTherefore, the location and thickness of the clay layer have significant influences on slope stabilityInfiltration/evaporation can obviously affect the stability of unsaturated layered slopes, but their

Keywords： slope stability     suction stress     unsaturated soil     layered slope     limit equilibrium    

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New pseudo-dynamic analysis of two-layered cohesive-friction soil slope and its numerical validation

Suman HAZARI, Sima GHOSH, Richi Prasad SHARMA

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6,   Pages 1492-1508 doi: 10.1007/s11709-020-0679-3

Abstract: study, the limit equilibrium modified pseudo-dynamic method is used to analyze the stability of two-layeredformulations derived from an analytical method are proposed for the predicting the seismic response in two-layered

Keywords： layered soil     limit equilibrium method     seismic analysis     damping     PLAXIS    

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Monitoring Technology to Stability of Layered Rocky High Side Slope

Chen Zhijian

Strategic Study of CAE 2001, Volume 3, Issue 5,   Pages 86-91

Abstract:

Based on the example of monitoring to the stability of the layered rocky high slope, base and foundationmonitoring spots, the embedding technology of hole with clinometer in fragmentary rock mass in high slopeand the establishment of the monitoring and predictive model to the stability of high slope are elucidatedThe discriminating discipline for the high slope stability based on the monitoring deformation resultevaluation method based on shear-slip, axial force and horizontal pushing force for the stability of high slope

Keywords： Jiangyin Bridge     tower     side slope stability     monitoring     hole with clinometer     monitoring and predictive    

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Technical Methods to Make Safety Monitoring and Forecast Models for the Foundation of Long Suspension Bridges

Chen Zhijian,Zhou Shizhong ,Zhuo Jiashou

Strategic Study of CAE 2002, Volume 4, Issue 6,   Pages 20-24

Abstract: of stability problem and the importance and technical difficulty to make safety monitoring model for layeredrocky slope of foundation of the south tower and resistance body of south anchorage in Jiangyin Yangtzedistribution, the monitoring and alarm model of residual anchorage thrust, j. e. , cause factor of slopestability, the comprehensive fuzzy evaluation model for slope safety based on external deformation observationresults and the forecast model for the stability of layered rocky slope based on observed internal shear

Keywords： layered rock mass     slope     monitoring and forecast model     technical methods    

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Quantification of seepage in a multi-layered disconnected river-aquifer system

Jiang LI, Haizhu HU, Xiaomin MAO, Yi LIU

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 2,   Pages 237-245 doi: 10.15302/J-FASE-2017135

Abstract: The vadose zone under riverbeds usually exhibits a multi-layered structure, particularly when paved withby assessing the dominant low permeability layers (including but not limited to the liners) in multi-layered

Keywords： infiltration     low permeability liner     multi-layered porous media     river-aquifer seepage    

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Bioengineering protection mechanism of city rock slope and its laboratory test

Desong JIANG, Minghua ZHAO, Chong JIANG,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 4,   Pages 414-421 doi: 10.1007/s11709-009-0055-9

Abstract: Based on the features of rock slope bioengineering protection, the ecology protection mechanism of theurban rock slope was discussed with the mechanics effect of plants and rock slope, and the reinforcementaction mechanism of rock slope by plant root system was analyzed as well.Moreover, the side slope rainfall interception, the runoff lagging, the soil antiseepage, and the soilThe antiwashing capability per unit area has a critical slope angle of about 25°.

Keywords： indoor     engineering project     protection mechanism     different     runoff lagging    

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Crack evolution of soft–hard composite layered rock-like specimens with two fissures under uniaxial compression

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 6,   Pages 1372-1389 doi: 10.1007/s11709-021-0772-2

Abstract: Acoustic emission and digital image correlation were used to study the spatiotemporal evolution characteristics of crack extension of soft and hard composite laminated rock masses (SHCLRM) containing double fissures under uniaxial compression. The effects of different rock combination methods and prefabricated fissures with different orientations on mechanical properties and crack coalescence patterns were analyzed. The characteristics of the acoustic emission source location distribution, and frequency changes of the crack evolution process were also investigated. The test results show that the damage mode of SHCLRM is related to the combination mode of rock layers and the orientation of fractures. Hard layers predominantly produce tensile cracks; soft layers produce shear cracks. The first crack always sprouts at the tip or middle of prefabricated fractures in hard layers. The acoustic emission signal of SHCLRM with double fractures has clear stage characteristics, and the state of crack development can be inferred from this signal to provide early warning for rock fracture instability. This study can provide a reference for the assessment of the fracture development status between adjacent roadways in SHCLRM in underground mines, as well as in roadway layout and support.

Keywords： soft−hard composite layered rock mass     double cracks     crack evolution     acoustic emission     digital image    

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Hierarchically porous cellulose nanofibril aerogel decorated with polypyrrole and nickel-cobalt layered

Frontiers of Chemical Science and Engineering doi: 10.1007/s11705-023-2348-2

Abstract: as a substrate to integrate highly conductive polypyrrole and active nanoflower-like nickel-cobalt layered

Keywords： cellulose nanofibril     aerogel     nickel-cobalt layered double hydroxide     polypyrrole     nonenzymatic glucose    

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Hydraulic fracturing pressure of concentric double-layered cylinder in cohesive soil

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4,   Pages 937-947 doi: 10.1007/s11709-021-0754-4

Abstract: This study aims to investigate hydrofracturing in double-layered soil through theoretical and experimentalis a linear relationship between the fracturing pressure and confining pressure in concentric double-layered

Keywords： hydraulic fracturing pressure     layered     cavity expansion theory     triaxial fracturing test     cohesive soil    

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Efficiency of scalar and vector intensity measures for seismic slope displacements

Gang WANG

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 1,   Pages 44-52 doi: 10.1007/s11709-012-0138-x

Abstract: Although no single intensity measure is efficient enough for all slope conditions, the spectral accelerationat 1.5 times of the initial slope period and Arias intensity of the input motion are found to be thecharacteristics of the ground motion and thus significantly improve the efficiency over a wide range of slopethe spectral accelerations at multiple spectral periods achieve high efficiency for a wide range of slopeprediction models as well as the ground motion selection criteria for time domain analysis of seismic slope

Keywords： seismic slope displacements     intensity measures     empirical prediction    

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Size effects in two-dimensional layered materials modeled by couple stress elasticity

Wipavee WONGVIBOONSIN, Panos GOURGIOTIS, Chung Nguyen VAN, Suchart LIMKATANYU, Jaroon RUNGAMORNRAT

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2,   Pages 425-443 doi: 10.1007/s11709-021-0707-y

Abstract: In the present study, the effect of material microstructure on the mechanical response of a two-dimensional elastic layer perfectly bonded to a substrate is examined under surface loadings. In the current model, the substrate is treated as an elastic half plane as opposed to a rigid base, and this enables its applications in practical cases when the modulus of the layer (e.g., the coating material) and substrate (e.g., the coated surface) are comparable. The material microstructure is modeled using the generalized continuum theory of couple stress elasticity. The boundary value problems are formulated in terms of the displacement field and solved in an analytical manner via the Fourier transform and stiffness matrix method. The results demonstrate the capability of the present continuum theory to efficiently model the size-dependency of the response of the material when the external and internal length scales are comparable. Furthermore, the results indicated that the material mismatch and substrate stiffness play a crucial role in the predicted elastic field. Specifically, the study also addresses significant discrepancy of the response for the case of a layer resting on a rigid substrate.

Keywords： cosserat     layered materials     size effects     microstructure    

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Evaluation and prediction of slope stability using machine learning approaches

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4,   Pages 821-833 doi: 10.1007/s11709-021-0742-8

Abstract: In this paper, the machine learning (ML) model is built for slope stability evaluation and meets thehigh precision and rapidity requirements in slope engineering.of this study includes six characteristics, namely unit weight, cohesion, internal friction angle, slopeangle, slope height, and pore water pressure ratio.Also, the SVM-poly method is used to analyze the susceptibility of slope parameters.

Keywords： slope stability     factor of safety     regression     machine learning     repeated cross-validation    

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Mechanical responses of multi-layered ground due to shallow tunneling with arbitrary ground surface load

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 5,   Pages 745-762 doi: 10.1007/s11709-023-0935-4

Abstract: complex variable theory is proposed to investigate ground responses due to shallow tunneling in multi-layeredmodel is superior to the classical model for analyzing ground responses of shallow tunneling in multi-layered

Keywords： analytical model     mechanical response     multi-layered ground     shallow tunneling     ground surface load    

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Research on New Technology for Sandy Slope Safety Protection

Niu Xiaodi,Yang Guangqing and Liu Weichao

Strategic Study of CAE 2017, Volume 19, Issue 6,   Pages 86-91 doi: 10.15302/J-SSCAE-2017.06.013

Abstract: TD-1 can be used with soil spraying technology for slope greening protection, and the solidified product

Keywords： sandy slope     sand consolidation agent     laboratory tests     field tests    

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Optimal CNN-based semantic segmentation model of cutting slope images

Mansheng LIN; Shuai TENG; Gongfa CHEN; Jianbing LV; Zhongyu HAO

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 4,   Pages 414-433 doi: 10.1007/s11709-021-0797-6

Abstract: convolutional network (FCN), and U-Net to qualitively analyze and identify the key components of cutting slopeimages in complex scenes and achieve rapid image-based slope detection.The elements of cutting slope images are divided into 7 categories.In order to determine the best algorithm for pixel level classification of cutting slope images, the

Keywords： slope damage     image recognition     semantic segmentation     feature map     visualizations    

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Title Author Date Type Operation

Stability analysis of layered slopes in unsaturated soils

Guangyu DAI; Fei ZHANG; Yuke WANG

Journal Article

New pseudo-dynamic analysis of two-layered cohesive-friction soil slope and its numerical validation

Suman HAZARI, Sima GHOSH, Richi Prasad SHARMA

Journal Article

Monitoring Technology to Stability of Layered Rocky High Side Slope

Chen Zhijian

Journal Article

Technical Methods to Make Safety Monitoring and Forecast Models for the Foundation of Long Suspension Bridges

Chen Zhijian,Zhou Shizhong ,Zhuo Jiashou

Journal Article

Quantification of seepage in a multi-layered disconnected river-aquifer system

Jiang LI, Haizhu HU, Xiaomin MAO, Yi LIU

Journal Article

Bioengineering protection mechanism of city rock slope and its laboratory test

Desong JIANG, Minghua ZHAO, Chong JIANG,

Journal Article

Crack evolution of soft–hard composite layered rock-like specimens with two fissures under uniaxial compression

Journal Article

Hierarchically porous cellulose nanofibril aerogel decorated with polypyrrole and nickel-cobalt layered

Journal Article

Hydraulic fracturing pressure of concentric double-layered cylinder in cohesive soil

Journal Article

Efficiency of scalar and vector intensity measures for seismic slope displacements

Gang WANG

Journal Article

Size effects in two-dimensional layered materials modeled by couple stress elasticity

Wipavee WONGVIBOONSIN, Panos GOURGIOTIS, Chung Nguyen VAN, Suchart LIMKATANYU, Jaroon RUNGAMORNRAT

Journal Article

Evaluation and prediction of slope stability using machine learning approaches

Journal Article

Mechanical responses of multi-layered ground due to shallow tunneling with arbitrary ground surface load

Journal Article

Research on New Technology for Sandy Slope Safety Protection

Niu Xiaodi,Yang Guangqing and Liu Weichao

Journal Article

Optimal CNN-based semantic segmentation model of cutting slope images

Mansheng LIN; Shuai TENG; Gongfa CHEN; Jianbing LV; Zhongyu HAO

Journal Article