Effects of particle size on crushing and deformation behaviors of rockfill materials

Xiao, Yang; Meng, Ming; Daouadji, Ali; Chen, Qingsheng; Wu, Zhijun; Jiang, Xiang

doi:10.1016/j.gsf.2018.10.010

Cited by 137 publications

(39 citation statements)

References 89 publications

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“…Nevertheless, the behaviour of soils cannot depend uniquely on the state parameter as other features such as fabric and anisotropy play an important role (Been et al, 1991). The stress levels whereby the evolution of particle crushing becomes significant and starts affecting the soil behaviour vary depending on several aspects including for instance the mineralogic composition of the sand (Leleu and Valdes, 2007) and the initial particle size distribution (Xiao et al, 2018). Whilst for silica sands particle breakage starts to influence the behaviour at pressures of the order of 5-20 MPa, for weaker soils such petroleum coke, pumice and coral carbonate sands such limit ranges from 100 -500 kPa ((Ciantia et al, 2016;Coop, 1990;McDowell and Bolton, 1998).…”

Section: Introductionmentioning

confidence: 99%

Calculating the State Parameter in Crushable Sands

Ciantia

O’Sullivan

2020

Int. J. Geomech.

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The state parameter (y) measures the distance from the current state to the critical state line (CSL) in the compression plane. The existence of a correlation between both the peak angle of shearing resistance (# $) and peak dilatancy and y is central to many constitutive models used to predict granular soil behaviour. These correlations do not explicitly consider particle crushing. Crushing induced evolution of the particle size distribution influences the CSL position and recent research supports used of a critical state plane (CSP) to account for changes in grading. This contribution evaluates the whether the CSP can be used to calculate y and thus enable prediction of the peak angle of # $ and peak dilatancy where crushing takes place. The data considered were generated from a validated DEM model of Fontainebleau sand that considers particle crushing. It is shown that where y is calculated by considering the CSL of the original uncrushed material there can be in a significant error in predicting the material response. Where the CSP is used there is a significant improvement in our ability to predict behaviour whether the CSP is accurately determined using a large number of tests or approximated using crushing yield envelopes. It is shown that the state parameter calculated using the previously available definition can give a false sense of security when assessing liquefaction potential of potentially crushable soils. The contribution also highlights the stress-path dependency of the relationship between # $ and y whichever approach is used to determine y.

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Section: Introductionmentioning

confidence: 99%

Calculating the State Parameter in Crushable Sands

Ciantia

O’Sullivan

2020

Int. J. Geomech.

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“…Rockfill has the particular properties of coarse particles with large sizes and its easily broken characteristics. ere is a significant relationship among the changing gradation along with the stress, dilatancy, and strength-deformation characteristics in rockfill materials [23,24]. erefore, it is important to study the mechanical properties of rockfill materials by quantitatively describing its gradation of rockfill materials which approaches the true properties and status of raw materials.…”

Section: Fractal Theorymentioning

confidence: 99%

The Constitutive Model of Rockfill Based on Property‐Dependent Plastic Potential Theory for Geomaterials

Zhang

et al. 2020

Advances in Civil Engineering

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To better control the strength and deformation of the roadbed, a constitutive model of rockfill was established based on property-dependent plastic potential theory for geomaterials. The effect of the particle gradation on the anisotropy was described in the model. According to the effect of the particle grading and crushing on the fractal dimension, the fractal theory and fabric tensor were introduced to establish the yield and failure criteria of the rockfill. By combining the property-dependent concepts of the materials and the results of the rockfill strength test, a critical state line considering the microstructure, fractal dimension, particle breakage, and stress state of the rockfill was established. The dilatancy equation was derived based on the novel potential theory and the hardening criterion affected by the critical state was established. A constitutive model of the rockfill in the general stress space was established under the framework of the novel potential theory. The 3D strength and its intensity change in the π plane were simulated through the drainage strength test results, which verified the description of the critical state under various stress paths. By simulating the stress-strain relationship, the validity and rationality of the model were verified.

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“…e filling of the dam and reservoir impounding was simulated before the dynamic computation. Because the rhyolite rockfill is the main-filled material and it is the hard rock, the particle breakage [18][19][20][21] has been ignored.…”

Section: Dynamic Analysis Of the Houziyan Concrete-faced Rockfill Dammentioning

confidence: 99%

Safety Evaluation of High Concrete‐Faced Rockfill Dam Based on Site‐Related Response Spectrum Using Scenario Earthquake

Zhu

Zhang

Wang

et al. 2020

Advances in Civil Engineering

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To clarify how to arrive at earthquake ground motion parameters for use in evaluating the high rockfill dams during seismic loading conditions, as well as to evaluate reasonably the seismic response of dams subjected to strong earthquake, the differences of design response spectra determined by scenario earthquake and uniform hazard spectra theory are investigated in detail. Coupled with the safety evaluation of the Houziyan concrete-faced rockfill dam (CFRD) with a height of 200 m located in meizoseismal regions, comprehensive comparisons of key safety evaluation indices are performed using input motions determined from the abovementioned two design response spectra. The key safety evaluation indices include dynamic response acceleration, permanent deformation, safety of the impervious body, safety factor, and sliding displacement of the potential failure sliding body. Additionally, the ultimate seismic capability of the high CFRD is discussed based on the two response spectra. More considerable results can be achieved and offered to the engineers for the seismic design. It is obvious that the uniform hazard spectra, which are used to adopt in the safety evaluation of high CFRD, typically result in conservative evaluations and unnecessary economic cost for seismic design and reinforcements.

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Effects of particle size on crushing and deformation behaviors of rockfill materials

Cited by 137 publications

References 89 publications

Calculating the State Parameter in Crushable Sands

Calculating the State Parameter in Crushable Sands

The Constitutive Model of Rockfill Based on Property‐Dependent Plastic Potential Theory for Geomaterials

Safety Evaluation of High Concrete‐Faced Rockfill Dam Based on Site‐Related Response Spectrum Using Scenario Earthquake

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