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Series: Geological Society, London, Special Publications
Published: 01 January 2019
DOI: 10.1144/SP482.15
EISBN: 9781786204288
... rock (outside the bentonite ring) and homogeneous bentonite. This illustrates why the resaturation of the bentonite ring is strongly influenced by the fracture network. Figure 11 shows the pressure evolution along a horizontal slice through the canister and buffer location. The suction within...
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Journal Article
Published: 05 November 2018
Quarterly Journal of Engineering Geology and Hydrogeology (2019) 52 (2): 220–229.
..., the coincidence of the shrinkage limit with the water content at the peak bulk density achieved in the test is examined. The shrinkage behaviour for undisturbed and remoulded states and a three-way relationship between water content, density and suction are demonstrated. Some tropical residual and highly...
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Journal Article
Published: 23 March 2018
Quarterly Journal of Engineering Geology and Hydrogeology (2018) 51 (2): 156–168.
... TU1202 – Impacts of climate change on engineered slopes for infrastructure. Climate- and vegetation-driven processes (suction generation, erosion, desiccation cracking, freeze–thaw effects) are expected to change in incidence and severity, which will affect the stability of new and existing...
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Journal Article
Published: 01 March 2016
Vadose Zone Journal (2016) 15 (3): vzj2015.11.0146.
...; quantify the relationships among soil suction, soil shrinkage, and water content using the same set of parameters; and predict sealing of soil cracks in the field. This approach provides the framework for accurate and unified hydromechanical modeling of swelling soils. * Corresponding author...
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Journal Article
Published: 01 December 2015
Journal of Sedimentary Research (2015) 85 (12): 1431–1437.
..., and extraction of the sample may be difficult. Some of these issues are overcome with vibracore or suction-core techniques. Vibracoring requires heavy, bulky, and relatively expensive equipment which is costly to ship to the remote field-study locations and difficult to use in muddy settings such as muddy tidal...
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Journal Article
Published: 28 October 2015
Quarterly Journal of Engineering Geology and Hydrogeology (2015) 48 (3-4): 212–223.
... and consequential slope instability ( Ballantyne 1986 ). In some cases, failure can also be triggered by loss of soil suction resulting from the downward migration of a rain-induced wetting front ( Fourie 1996 ; Springman et al . 2003 ). The characteristics of preceding rainfall and the associated influence...
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Journal Article
Published: 01 September 2015
Vadose Zone Journal (2015) 14 (9): vzj2014.10.0152.
...Fabio Ciervo; Francesca Casini; Maria Nicolina Papa; Riccardo Rigon Abstract Hydraulic properties affect the shear strength of unsaturated soils in terms of suction, predicted as a function of water volume in the pores. In complex pore geometries, such as soils with bimodal pore-size distributions...
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Journal Article
Published: 01 September 2015
Vadose Zone Journal (2015) 14 (9): vzj2015.01.0006.
...C. W. W. Ng; C. Zhou; A. K. Leung Abstract The axis-translation (ATT), osmotic (OMT), and vapor equilibrium (VET) techniques are widely used suction control techniques for investigating the hydraulic and mechanical behavior of unsaturated soils in the vadose zone. Yet there is still debate...
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Journal Article
Published: 01 August 2015
Vadose Zone Journal (2015) 14 (8): vzj2014.10.0153.
...M. Berli; F. Casini; W. Attinger; R. Schulin; S.M. Springman; J.M. Kirby Abstract The protection of soils against compaction requires knowledge of the mechanical behavior and properties of structured, unsaturated soils at different water suctions. This study of an agricultural silt loam soil...
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Journal Article
Published: 01 July 2015
Vadose Zone Journal (2015) 14 (7): vzj2014.07.0088.
... hysteretic effects in the relation between water content and soil particle wettability versus suction for model samples following drying and wetting paths. A comparison is done for a model material (mixture of sand and clay) with and without water repellent substances, being the samples with water repellent...
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Journal Article
Published: 01 October 2014
Vadose Zone Journal (2014) 13 (10): vzj2014.01.0012.
... infiltration rate data at multiple locations within a given infiltration practice. Green–Ampt theory was used to derive the expressions needed for analyzing the falling-head data to solve for the field-saturated hydraulic conductivity ( K fs ) and Green–Ampt wetting-front suction (ψ). The accuracy...
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Journal Article
Published: 01 August 2014
Vadose Zone Journal (2014) 13 (8): vzj2014.04.0044.
... understanding and to recognize the limitations of the technique. Column experiments were designed to investigate the relations between imposed suctions, water saturations, and water extraction. Flow cell experiments were conducted to investigate the effects of high-permeability layers and near-well compaction...
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Journal Article
Published: 01 May 2014
Vadose Zone Journal (2014) 13 (5): vzj2013.07.0131.
...Xiaoyu Song; Ronaldo I. Borja Abstract The first law of thermodynamics suggests an energy-conjugate relationship among degree of saturation, suction stress, and density of an unsaturated porous material. Experimental evidence affirms that this constitutive relationship exists and that the water...
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Journal Article
Published: 01 May 2014
Vadose Zone Journal (2014) 13 (5): vzj2013.04.0077.
...Seboong Oh; Ning Lu Abstract The soil water retention curve (SWRC) describes a soil’s constitutive relation between matric suction and volumetric water content. The suction stress characteristic curve (SSCC) describes a soil’s constitutive relation between suction stress and volumetric water...
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Journal Article
Published: 01 May 2014
Vadose Zone Journal (2014) 13 (5): vzj2013.05.0095.
... sand-sized materials shows non-monotonic behavior as a function of saturation, with the peak interface area between 10 and 25% saturation. Comparisons are made between suction stress characteristic curves calculated with and without accounting for interfacial forces calculated using surface tension...
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Journal Article
Published: 01 May 2014
Vadose Zone Journal (2014) 13 (5): vzj2013.06.0109.
... suction and net normal stress. The total suction was controlled using an automated humidity system, and variables monitored during equilibration and shearing include anisotropic volume change, axial displacement, temperature, relative humidity at the top and bottom of the specimen, and the gas pressure...
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Journal Article
Published: 01 May 2014
Vadose Zone Journal (2014) 13 (5): vzj2013.06.0112.
...Wiebke Baille; Snehasis Tripathy; Tom Schanz Abstract The effective stress in clays possessing a significant proportion of one of the clay minerals kaolinite, illite, or montmorillonite was determined based on the suction stress characteristic curves (SSCCs) of the clays. The SSCCs were determined...
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Journal Article
Published: 01 May 2014
Vadose Zone Journal (2014) 13 (5): vzj2013.06.0114.
... in partially saturated soils. The results showed that suction stresses derived by triaxial and tensile tests were consistent at saturations >0.1, while the prediction of suction stress from the drying and wetting soil water characteristic curves of the mixture failed. Experimental results indicated...
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Journal Article
Published: 01 May 2014
Vadose Zone Journal (2014) 13 (5): vzj2013.07.0129.
... in the form of liquid bridges at contacts is fundamentally different from applying an equivalent isotropic stress to the soil externally. * Corresponding author ( toker@metu.edu.tr ). 12 07 2013 Copyright © by the Soil Science Society of America, Inc. 2014 The link from suction...
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Journal Article
Published: 01 May 2014
Vadose Zone Journal (2014) 13 (5): vzj2013.07.0130.
... is recognized to induce capillary suction in the pores and capillary-suction-induced interparticle forces. At the macroscale, volume averaging of these forces would lead to the capillary-suction-induced intergranular stress tensor. In its approximate formulation, the concept of the fabric stress tensor...
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