Influence of Saturation on Hydromechanical Properties of Glacial Tills

Ciocca, Jose V. Renjifo; Makhnenko, Roman Y.

doi:10.1061/9780784483435.028

Cited by 2 publications

(2 citation statements)

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“…Understanding and accurately characterizing the physical properties of moraine soils are thus of great significance for the prediction and mitigation of these geohazards. The physical properties of moraine soils have been experimentally and numerically investigated, including their mechanical properties (Cherepanin et al., 2018; H. Hu et al., 2020; Lebourg et al., 2004; T. Liu et al., 2020; Renjifo & Makhnenko, 2021; Sharratt & Lindstrom, 2001; Stock et al., 2007), hydraulic conductivity (Demand et al., 2019; Ming et al., 2020; Pittman et al., 2019; Seyfried & Murdock, 1997; Watanabe et al., 2013), and thermal conductivity (Naylor et al., 2015; Tinsley & Pavía, 2019; X. Xie et al., 2018; Zhao et al., 2019).…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Thermal‐Hydraulic Coupling Behavior for Moraine Soil With Ice Inclusions in a Warming Environment

Zhou,

Zhu,

et al. 2023

Water Resources Research

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A warming environment is promoting the thawing process in ice‐rich moraine soils in cold alpine regions, thereby accelerating the formation/development of geohazards in these regions. The mechanism of these geohazards is closely related to the thermal‐hydraulic (TH) coupling behavior of moraine soils, which has rarely been investigated. Here, we conducted a series of bench‐scale TH coupling simulations of moraine soils with ice inclusions in a warming environment. The numerical model was conceptualized from a field survey on the Qinghai‐Tibet Plateau, which consists of a porous medium embedded with multilayer ice cubes with warmer water continuously flowing through it. A TH coupling framework considering ice‐water phase change was established to implement this coupled simulation with different initial ice contents and hydraulic gradients. The simulated results showed phased and nonlinear evolutionary features of temperature, ice content, and permeability for the moraine soil system. Further analyses showed that these complex evolutionary features can be reproduced by empirical formulas, with concise expressions following dimensional consistency and some coefficients having potential physical meanings. The discriminant models of two equilibrium states were finally developed to predict the critical times of structure stabilization and thermal equilibrium of the moraine soil system. This study presents the complex evolution of TH coupling properties of moraine soils, and simultaneously demonstrates that these properties can be predicted and characterized.

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Section: Introductionmentioning

confidence: 99%

“…Hu et al, 2020;Lebourg et al, 2004;T. Liu et al, 2020;Renjifo & Makhnenko, 2021;Sharratt & Lindstrom, 2001;Stock et al, 2007), hydraulic conductivity (Demand et al, 2019;Ming et al, 2020;Pittman et al, 2019;Seyfried & Murdock, 1997;Watanabe et al, 2013), and thermal conductivity (Naylor et al, 2015;Tinsley & Pavía, 2019;X. Xie et al, 2018;Zhao et al, 2019).…”

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Characterization of Thermal‐Hydraulic Coupling Behavior for Moraine Soil With Ice Inclusions in a Warming Environment

Zhou,

Zhu,

et al. 2023

Water Resources Research

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Evaluation of CO ₂ sealing potential of heterogeneous Eau Claire shale

Kim

Makhnenko

2023

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During geological carbon dioxide storage in deep saline aquifers, buoyant CO 2 tends to float upwards in the reservoir overlaid by a low permeable formation called a caprock. Caprocks should serve as barriers to potential CO 2 leakage that can happen through diffusion and permeation through faults, fractures or pore spaces. The leakage through intact caprock would mainly depend on its permeability and CO 2 breakthrough pressure and is affected by the heterogeneities in the material. Here, we study the sealing potential of a caprock from the Illinois Basin – Eau Claire shale, with sandy and clayey fractions distinguished via electron microscopy, grain/pore size analyses and surface area characterization. The direct measurements of permeability of sandy shale provide the values on the order of 10 −15 m 2 , while clayey specimens are three orders of magnitude less permeable. The CO 2 breakthrough pressure under in situ stress conditions is 0.1 MPa for the sandy shale and 0.4 MPa for the clayey counterpart – these values are higher than those predicted by the porosimetry methods performed on the unconfined specimens. Sandy Eau Claire shale would allow penetration of large CO 2 volumes at low overpressures, while the clayey formation can potentially serve as a caprock in the absence of faults and fractures.

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Influence of Saturation on Hydromechanical Properties of Glacial Tills

Cited by 2 publications

References 24 publications

Characterization of Thermal‐Hydraulic Coupling Behavior for Moraine Soil With Ice Inclusions in a Warming Environment

Characterization of Thermal‐Hydraulic Coupling Behavior for Moraine Soil With Ice Inclusions in a Warming Environment

Evaluation of CO ₂ sealing potential of heterogeneous Eau Claire shale

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Influence of Saturation on Hydromechanical Properties of Glacial Tills

Cited by 2 publications

References 24 publications

Characterization of Thermal‐Hydraulic Coupling Behavior for Moraine Soil With Ice Inclusions in a Warming Environment

Characterization of Thermal‐Hydraulic Coupling Behavior for Moraine Soil With Ice Inclusions in a Warming Environment

Evaluation of CO 2 sealing potential of heterogeneous Eau Claire shale

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Evaluation of CO ₂ sealing potential of heterogeneous Eau Claire shale