Seismic Stability of Unsupported Vertical Circular Excavations in c-φ Soil

2022 ◽  
Author(s):  
Patteera Petchkaew ◽  
Suraparb Keawsawasvong ◽  
Weeradetch Tanapalungkorn ◽  
Suched Likitlersuang
Keyword(s):  
Seismic Stability

Seismic Stability Evaluation of Folsom Dam and Reservoir Project. Report 7. Upstream Retaining Wall

1988 ◽  
Author(s):  
Jr Leeman ◽  
Hynes Harold J. ◽  
Vanadit-Ellis Mary E. ◽  
Tsuchida Wipawi ◽  
Takashi
Keyword(s):  
Retaining Wall ◽  
Seismic Stability ◽  
Stability Evaluation ◽  
Project Report ◽  
Reservoir Project

Seismic stability of the underground main pipeline

2011 ◽  
Vol 8 (1) ◽  
pp. 275-286
Author(s):  
R.G. Yakupov ◽  
D.M. Zaripov
Keyword(s):  
Laplace Transformation ◽  
Seismic Waves ◽  
Generalized Functions ◽  
Seismic Stability ◽  
Main Pipeline ◽  
Motion Equations ◽  
Numerical Example ◽  
Earthquake Force ◽  
Deformed State

The stress-deformed state of the underground main pipeline under the action of seismic waves of an earthquake is considered. The generalized functions of seismic impulses are constructed. The pipeline motion equations are solved with used Laplace transformation by the time. Tensions and deformations of the pipeline have been determined. A numerical example is reviewed. Diagrams of change of the tension depending on earthquake force are provided in earthquake-points.

Seismic stability of coal tailings dams with spatially variable and liquefiable coal tailings using pore pressure plasticity models

2021 ◽  
Vol 132 ◽  
pp. 104017
Author(s):  
Sajjad Salam ◽  
Ming Xiao ◽  
Arash Khosravifar ◽  
Katerina Ziotopoulou
Keyword(s):  
Pore Pressure ◽  
Seismic Stability ◽  
Tailings Dams ◽  
Coal Tailings

Seismic stability of a standalone glove box structure

2014 ◽  
Vol 276 ◽  
pp. 178-190 ◽  
Author(s):  
A. Saraswat ◽  
G.R. Reddy ◽  
S. Ghosh ◽  
A.K. Ghosh ◽  
Arun Kumar
Keyword(s):  
Seismic Stability ◽  
Box Structure

Effect of waste rock inclusions on the seismic stability of an upstream raised tailings impoundment: a numerical investigation

2015 ◽  
Vol 52 (12) ◽  
pp. 1930-1944 ◽  
Author(s):  
Behnam Ferdosi ◽  
Michael James ◽  
Michel Aubertin
Keyword(s):  
Ground Motions ◽  
Low Frequency ◽  
Horizontal Displacement ◽  
Waste Rock ◽  
Seismic Stability ◽  
Environmental Damage ◽  
Total Width ◽  
Tailings Impoundment ◽  
Downstream Slope ◽  
Potential Failure

Over the years, seismic activity has been a relatively common cause of tailings impoundment failure. The flow of liquefied tailings from such ruptures can result in very severe consequences, including loss of life and environmental damage. A co-disposal technique consisting of placing waste rock inclusions in tailings impoundments prior to and during tailings deposition was proposed by the authors. The waste rock is placed to create continuous inclusions within the impoundment, which provide a number of environmental and geotechnical benefits, particularly with respect to seismic stability. The results of numerical simulations previously performed have shown that the UBCSAND model can predict the seismic response of tailings. The UBCSAND constitutive model was used to conduct simulations to evaluate of the use of waste rock inclusions to improve the seismic stability of a tailings impoundment. The evaluation consists of numerical analyses of an actual tailings impoundment as constructed (without inclusions), and then assuming that it was constructed with inclusions, subjected to earthquake loads of various energy contents and with different predominant frequencies. The analyses were conducted in static, seismic, and post-shaking phases. The displacement of the surface of downstream slope of the tailings dyke was recorded during the analyses. The results indicate that the presence of waste rock inclusions can significantly improve the seismic behavior of the impoundment by reducing the displacements of the surface of the downstream slope and the extent of potential failure zones. Also, the results show that in most cases, the influence of a low-frequency earthquake on the displacement of the downstream slope of the tailings dyke is more important than that of a high-frequency earthquake. The performances of the tailings impoundment with different configurations of waste rock inclusions (varying width and center-to-center spacing) were classified based on the average normalized horizontal displacement of the downstream slope (ARx) for a range input ground motions. Charts were then developed to show how ARx is influenced by the total width of inclusions, their spacing, and the input ground motions.

Seismic stability of earth dams

1992 ◽  
Vol 26 (2) ◽  
pp. 91-99 ◽  
Author(s):  
L. N. Rasskazov ◽  
A. S. Bestuzheva
Keyword(s):  
Seismic Stability ◽  
Earth Dams
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