Assessing the Suffusion Susceptibility of the Homogeneous Earth Dam Body Considering Spatial Variability of Soil Properties
Abstract
The suffusion susceptibility of the soil samples is evaluated through an erosion resistance index. The erosion resistance index is estimated from several soil parameters thanks to existing statistical analyses. In actual exploitation, the soil properties with the input parameters are related to the grain distribution of the soil. Vary greatly from the original design value due to the influence of many factors. One of the factors is the inherent variability. Inherent soil variability is modeled as a random field. The usual problems used to assess the suffusion susceptibility maybe not give accurate results or fully evaluate the actual working ability of the ground in each case. That is one of the reasons why dams are still eroded when they are put into use. The paper aims to assess the suffusion susceptibility of the earth dam body using a two-dimensional (2D) Stochastics random field, modeling the initial problem, considering the variability spatial of soil properties, using the assumption of a Normal random field of soil characteristics parameters. The research goals predict the two-dimensional spatial variability of erosion resistance index of the dam body, probability of suffusion susceptibility, and the variability spatial of density and internal friction angle. An illustration of a numerical simulation of a homogeneous earth dam body is presented in this paper. The scientific novelty of the paper shows the predicted results of the two-dimensional spatial variability of erosion resistance index with a contour map and probability of suffusion susceptibility of the homogeneous earth dam body. Furthermore, the two-dimensional spatial variability maps of density and internal friction angle are also shown.
Keywords: internal erosion, suffusion susceptibility, numerical simulation, random field, earth dam.
https://doi.org/10.55463/issn.1674-2974.49.2.30
Full Text:
PDFReferences
FOSTER M., FELL R., and SPANAGLE M. The statistics of embankment dam failures and accidents. Canadien Geotechnical Journal, 2000, 37: 1000-1024. https://cdnsciencepub.com/doi/10.1139/t00-030
FELL R., & FRY J. J. Erosion in geomechanics applied to dams and levees. ISTE-Wiley, London, 2013. https://onlinelibrary.wiley.com/doi/book/10.1002/9781118577165
KENNEY T. C., & LAU D. Internal stability of granular filters. Canadien Geotechnical Journal, 1985, 22: 215-225. https://cdnsciencepub.com/doi/10.1139
ROCHIM A., MAROT D., SIBILLE L., and LE V. T. Effects of hydraulic loading history on suffusion susceptibility of cohesionless soils. Journal of Geotechnical and Geoenvironmental Engineering, 2017, 143(7): 04017025. https://ascelibrary.org/doi/10.1061/%28ASCE%29GT.1943-5606.0001673
MAROT D., BENDAHMANE F., and KONRAD J. M. Multichannel optical sensor quantify particle stability under seepage flow. Canadian Geotechnical Journal, 2011, 48: 1772-1787. https://cdnsciencepub.com/doi/10.1139/t11-074
MAROT D., REGAZZONI P. L., and WAHL T. Energy based method for providing soil surface erodibility rankings. Journal of Geotechnical and Geoenvironmental Engineering, 2011, 48: 1772-1787. https://hal.archives-ouvertes.fr/hal-01006796/document
LE V. T., MAROT D., ROCHIM A., BENDAHMANE F., and NGUYEN H. H. Suffusion Susceptibility Investigation by Energy Based Method and Statistical Analysis. Canadian Geotechnical Journal, 2018, 55(1): 57–68. https://cdnsciencepub.com/doi/10.1139/cgj-2017-0024
MAROT D., ROCHIM A., NGUYEN H. H., BENDAHMANE F., and SIBILLE L. Assessing the susceptibility of gap graded soils to internal erosion characterization: proposition of a new experimental methodology. Natural Hazards, 2016, 83: 365–388. https://link.springer.com/article/10.1007/s11069-016-2319-8
ZHONG C., LE V. T., BENDAHMANE F., MAROT D., and YIN Z.-Y. Investigation of Spatial Scale Effects on Suffusion Susceptibility. Journal of Geotechnical and Geoenvironmental Engineering, 2018, 144, (9): 04018067. https://ascelibrary.org/doi/10.1061/%28ASCE%29GT.1943-5606.0001935
ZHANG L., GELET R., MAROT D., SMITH M., and KONRAD J.-M. A method to assess the suffusion susceptibility of low permeability core soils in compacted dams based on construction data. European Journal of Environmental and Civil Engineering, 2018: 2116-7214. https://www.tandfonline.com/doi/abs/10.1080/19648189.2018.1474386?journalCode=tece20
VANMARCKE E. H. Probability modeling of soil profiles. Journal of the Geotechnical Engineering Division, 1977, 103(11): 1227–1246. https://ascelibrary.org/doi/abs/10.1061/AJGEB6.0000517#:~:text=Probabilistic%20soil%20profiles%20are%20characterized,the%20profile%20parameters%20of%20interest.
Refbacks
- There are currently no refbacks.