Current methods of dynamic analysis for seismic stability of earth dams

Marcuson, William F.; Hadala, Paul F.; Franklin, Arley G.

doi:10.1016/0013-7952(80)90004-6

Cited by 5 publications

(5 citation statements)

References 8 publications

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“…On the other hand, the use of a permanent and unidirectional force to represent the seismic shaking in pseudostatic analyses significantly underestimates the seismic stability of a slope. Consequently, scaling coefficients must be chosen to account for only a fraction of the PGA, which in fact is effective only for a very short time (Blake et al, ; Jibson, ; Jibson & Michael, ; Kramer, ; Marcuson, ; Seed, ; Terzaghi, ; Wieczorek et al, ).…”

Section: Coseismic Landslidesmentioning

confidence: 99%

Earthquake‐Induced Chains of Geologic Hazards: Patterns, Mechanisms, and Impacts

Fan

Scaringi

Korup

et al. 2019

Reviews of Geophysics

614

325

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Large earthquakes initiate chains of surface processes that last much longer than the brief moments of strong shaking. Most moderate‐ and large‐magnitude earthquakes trigger landslides, ranging from small failures in the soil cover to massive, devastating rock avalanches. Some landslides dam rivers and impound lakes, which can collapse days to centuries later, and flood mountain valleys for hundreds of kilometers downstream. Landslide deposits on slopes can remobilize during heavy rainfall and evolve into debris flows. Cracks and fractures can form and widen on mountain crests and flanks, promoting increased frequency of landslides that lasts for decades. More gradual impacts involve the flushing of excess debris downstream by rivers, which can generate bank erosion and floodplain accretion as well as channel avulsions that affect flooding frequency, settlements, ecosystems, and infrastructure. Ultimately, earthquake sequences and their geomorphic consequences alter mountain landscapes over both human and geologic time scales. Two recent events have attracted intense research into earthquake‐induced landslides and their consequences: the magnitude M 7.6 Chi‐Chi, Taiwan earthquake of 1999, and the M 7.9 Wenchuan, China earthquake of 2008. Using data and insights from these and several other earthquakes, we analyze how such events initiate processes that change mountain landscapes, highlight research gaps, and suggest pathways toward a more complete understanding of the seismic effects on the Earth's surface.

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Section: Coseismic Landslidesmentioning

confidence: 99%

Earthquake‐Induced Chains of Geologic Hazards: Patterns, Mechanisms, and Impacts

Fan

Scaringi

Korup

et al. 2019

Reviews of Geophysics

614

325

View full text Add to dashboard Cite

show abstract

“…The horizontal seismic coefficient (Kh) used in the pseudo-static stability analyses was adopted as being equal to 50% of the PGA, as recommended by several authors (Corps of Engineers, 1982;Marcuson and Franklin, 1983;Hynes-Griffin and Franklin, 1984;among others). Although the use of a value for the vertical seismic coefficient Kv is a widespread concept, Seed and Martin (1966), and Duncan and Wright (2005) suggest that the vertical seismic coefficient be adopted equal to 0, under the assumption that the motion of seismic shear waves is vertical.…”

Section: Stability Analysismentioning

confidence: 99%

Comparative Analysis of the Effect of Disposal in Tailings and Waste Rock Piles

Fontes¹,

Montilla²,

Milagres³

et al. 2023

Proceedings of the TMIC 2022 Slope Stability Conference (TMIC 2022)

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The disposal of tailings currently represents a major challenge in the Brazilian mining scenario. As a result of the accidents that have occurred in the last decade, the legislation has become increasingly demanding with regard to the disposal processes of these materials. Therefore, new disposal systems are being researched and studied to ensure safer, functional and efficient procedures. One of the strategies currently being evaluated is the implementation of piles with mixed disposal of tailings and waste rock. This study aims to compare the numerical modeling of two alternatives for mixed disposal systems in piles. The first considered an interlayer disposal of tailings and waste rock in an layered comingling system, and the second considered a homogeneous mixture of tailings (50%) and waste rock (50%) in a co-disposal system.The material characterization and geotechnical parameters were obtained from laboratory tests. To understand the stress-strain behavior, finite element analyses were performed using RS2 software. Additionally, limit equilibrium analyses were performed with SLIDE 2 to evaluate the stability of each system. The results obtained did not show significant differences between the two disposal systems, presenting similar safety factors, as well as deformations and displacements in the same order of magnitude. The studies performed show the opportunity to implement interleaved systems for tailings disposal as well as the need to conduct more detailed studies that evaluate more critical considerations in the structure.

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“…In contrast with the few examples related to the closure of tailings dam, there are many examples connected with the dynamic analysis of earth-dams stability [15][16][17][18][19][20][21][22][23][24][25][26][27][28]. It is important to note that, traditionally, quasi (pseudo)-static approaches were utilized to assess fill dams in statical terms.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Analysis of the Almagrera Tailings Dam with Dry Closure Condition

Morales-Esteban,

Alpañés,

Castillo

et al. 2024

Sustainability

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In light of growing concerns over sustainability, particularly in the wake of environmental disasters like the Aznalcollar dam break, the Spanish authorities have heightened their awareness of issues surrounding ore tailings management.The main aim of this paper is to study the dynamic behavior for the dry closure of the Almagrera dam under the action of an earthquake. This study was carried out with the Plaxis 2D v9.02 program, which uses the finite element (FE) method. The dynamic analysis of the dam was interpreted in terms of deformations, displacements and principal stresses. The construction of the Uniform Seismic Hazard Acceleration Response Spectrum (USHARS) and the selection of real accelerograms for the time-history dynamic calculations is a noted feature of this research. Numerical analyses show that the dam is safe enough because a failure surface has not been formed, although several plastic zones may appear in the dam. The FE study of deformations display that the tailings may attain large deformations, displacements and failure, although this does not jeopardize the safety of the dam where the displacements are smaller than 3 mm. Neither the tailings nor the dam are expected to suffer liquefaction. It was determined that the 0.09 g threshold value is not exceeded in the acceleration-time graphs on the old reservoir field surface, which is the most critical situation.

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Current methods of dynamic analysis for seismic stability of earth dams

Cited by 5 publications

References 8 publications

Earthquake‐Induced Chains of Geologic Hazards: Patterns, Mechanisms, and Impacts

Earthquake‐Induced Chains of Geologic Hazards: Patterns, Mechanisms, and Impacts

Comparative Analysis of the Effect of Disposal in Tailings and Waste Rock Piles

Dynamic Analysis of the Almagrera Tailings Dam with Dry Closure Condition

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