Soil stochastic parameter correlation impact in the piping erosion failure estimation of riverine flood defences

Lopez, J.P. Aguilar; Warmink, Jord Jurriaan; Schielen, Ralph Mathias Johannes; Hulscher, Suzanne J.M.H.

doi:10.1016/j.strusafe.2016.01.004

Cited by 8 publications

(3 citation statements)

References 20 publications

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“…At the same time, numerical analysis has proved to be a suitable and effective tool in order to take into account a further fundamental geotechnical issue, that is the intrinsic variability of soils properties, even in relatively homogeneous deposits, together with the unavoidable uncertainties due to limited experimental data and to the related correlation models adopted for soil characterization [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Reliability analysis of riverbank stability accounting for the intrinsic variability of unsaturated soil parameters

et al. 2020

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Section: Introductionmentioning

confidence: 99%

Reliability analysis of riverbank stability accounting for the intrinsic variability of unsaturated soil parameters

et al. 2020

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“…Research on bank-slope stability has shown that numerical analysis methods provide an appropriate and effective tool to establish numerical models. Based on changes in the intrinsic properties of soil and experimental data, the bank-slope stability remains to be analyzed [52][53][54][55][56][57]. Current research rarely involved the characteristics of lime to improve the oil-contaminated soil, and carrying out relevant research is urgently needed to repair the soil to reinforce the ancient dike.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Repairing the Mechanical Characteristics of Oil-Contaminated Silty Clay in Ancient Dike with Modified Lime Mortar

Zhou

Dong

Dong³

et al. 2023

Materials

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Flood-controlled ancient dikes play a significant role in flood control and have received widespread attention as historical and cultural symbols. Flood-controlled ancient dikes often undergo disasters, and research on their repair is receiving increasing attention from experts and scholars. This article studies the control of seepage and bank slope instability in flood-controlled ancient dikes. Starting from the repair of ancient dike materials, three types of work are carried out: a test of soil’s mechanical properties, finite element numerical simulation, and repair technology research. The research results show that the soil of the ancient dike site has hardened after being contaminated with waste oil from catering. The strength index of the ancient dike soil decreases and shows brittleness when the water content is 15% and the oil content exceeds 6%. The strength index and permeability coefficient of oil-contaminated soil improved using modified lime mortar (MLM), which was achieved using the method of MLM to repair oil contaminated soil. When the MLM content was 10% and the oil content was 6%, the friction angle of the soil sample reached its maximum value. When the MLM content was the same, the higher the density of the soil sample, the greater the friction angle and cohesion and the smaller the permeability coefficient. Establishing a finite element numerical model, through comparative analysis, it was found that after MLM remediation of oil-contaminated soil, the extreme hydraulic gradient of the ancient dike decreased by 31.3%, and the extreme safety factor of the bank slope stability increased by 31.2%. MLM pressure grouting technology was used to improve the soil during the remediation of contaminated soil at the ancient dike site. Through on-site drilling inspection, the effective diffusion radius of MLM grouting was obtained, and the plane layout and grouting depth of MLM pressure grouting were determined. The on-site water injection permeability test showed that using MLM pressure grouting technology can effectively repair oil-contaminated soil in the ancient dike while reducing the permeability coefficient by 8–15%.

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“…Recently, researchers have recognized the significance of the heterogeneity in seepage erosion analyses [ Kanning , ; Aguilar‐López et al ., ; Robbins and Sharp , ]. To our best of knowledge, BEP studies that consider the heterogeneity, however, are still rare.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of backward erosion piping in heterogeneous fields

Liang

Yeh

Wang

et al. 2017

Water Resources Research

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Backward erosion piping (BEP) is one of the major causes of seepage failures in levees. Seepage fields dictate the BEP behaviors and are influenced by the heterogeneity of soil properties. To investigate the effects of the heterogeneity on the seepage failures, we develop a numerical algorithm and conduct simulations to study BEP progressions in geologic media with spatially stochastic parameters. Specifically, the void ratio e, the hydraulic conductivity k, and the ratio of the particle contents r of the media are represented as the stochastic variables. They are characterized by means and variances, the spatial correlation structures, and the cross correlation between variables. Results of the simulations reveal that the heterogeneity accelerates the development of preferential flow paths, which profoundly increase the likelihood of seepage failures. To account for unknown heterogeneity, we define the probability of the seepage instability (PI) to evaluate the failure potential of a given site. Using Monte‐Carlo simulation (MCS), we demonstrate that the PI value is significantly influenced by the mean and the variance of ln k and its spatial correlation scales. But the other parameters, such as means and variances of e and r, and their cross correlation, have minor impacts. Based on PI analyses, we introduce a risk rating system to classify the field into different regions according to risk levels. This rating system is useful for seepage failures prevention and assists decision making when BEP occurs.

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Soil stochastic parameter correlation impact in the piping erosion failure estimation of riverine flood defences

Cited by 8 publications

References 20 publications

Reliability analysis of riverbank stability accounting for the intrinsic variability of unsaturated soil parameters

Reliability analysis of riverbank stability accounting for the intrinsic variability of unsaturated soil parameters

Experimental Study on Repairing the Mechanical Characteristics of Oil-Contaminated Silty Clay in Ancient Dike with Modified Lime Mortar

Numerical simulation of backward erosion piping in heterogeneous fields

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