Laboratory and Field Testing of Unsaturated Soils

Tarantino, Alessandro; Romero, E.; Cui, Yu‐Jun

doi:10.1007/978-1-4020-8819-3

Cited by 17 publications

(2 citation statements)

References 280 publications

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“…At the clay particle water contact, swelling is caused by concentration gradients as the soil system disperses. An eroding fluid's flocculated and deflocculated phases border are affected by its sodium adsorption ratio, concentration of salt, mineralogy, and pH value [78]. Filho observed, J.T.…”

Section: Dispersive Soilsmentioning

confidence: 99%

Using water treatment sludge to Improve Geotechnical Engineering Properties of Soils: A Review

Hamid¹,

Aljanabi²,

Mustafa³

2023

AJES

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Section: Dispersive Soilsmentioning

confidence: 99%

Using water treatment sludge to Improve Geotechnical Engineering Properties of Soils: A Review

Hamid¹,

Aljanabi²,

Mustafa³

2023

AJES

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“…The more dispersed the soil system is, the greater is the swelling caused by the concentration gradients at the clay particle water interface. For a given eroding fluid the boundary between the flocculated and deflocculated states depends on the value of the sodium adsorption ratio, the salt concentration, the pH value and the mineralogy [10].…”

Section: Dispersive Soilsmentioning

confidence: 99%

Geotechnical Properties of Problematic Soils Emphasis on Collapsible Cases

Rezaei¹,

Ajalloeian²,

Ghafoori³

2012

IJG

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Soils are unconsolidated materials that are result of weathering and erosion process of rocks. When water content of some soils change, it makes problems to civil activities. These problems include swelling, dispersing and collapse. The change of water content of expansive soils causes to changes their volume. The volume change can damage structures that have built on the soils. In dispersive soils, particles move through soils with water flow. It may be conduits form in the soils. Collapsible soils are settled when saturated under loading. The rapid collapse of soils damages the structures which have built on soil. Problematic soils are formed in especial geological conditions. For example, collapsible soils are often founded in semi-arid area. Field observation and laboratory test can be useful to identify problematic soils. Some properties of soils such as dry density and liquid limit are helpful to estimate collapsibility potential of soils. In this regard, it was done a series laboratory tests to evaluate the collapsibility rate.

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Coupled inversion of hydraulic and self‐potential data from transient outflow experiments to estimate soil petrophysical properties

Xie

Cui

Niu

2021

Vadose Zone Journal

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Hydraulicproperties of soils could play an important role in affecting the partitioning of precipitation in the critical zone. In addition to traditional approaches, in the last two decades, many geophysical methods have been used to aid the hydrologic characterization and measurement of geological materials. In particular, the self-potential (SP) method shows great potential in these hydrogeophysical applications. The objective of this study is to evaluate whether the addition of SP data can improve the estimation of hydraulic properties of soils in an outflow experiment. A stochastic, coupled hydrogeophysical inversion was developed, in which the governing equations were solved using the finite volume method and the parameter estimation was conducted using a Bayesian approach associated with the Markov chain Monte Carlo technique. The results show that the addition of SP data in the inversion could reduce the uncertainty related to the estimated hydraulic parameters of soils and the length of the associated 95% confidence interval can be shortened by ∼1/3. It is also shown that the electrical properties of soils at saturated and unsaturated conditions may also be estimated from the outflow experiment when SP data are available. Compared with hydraulic parameters, the accuracy of the estimated electrical properties is slightly lower. Among them, the saturated streaming potential coupling coefficient C sat has the highest accuracy and lowest uncertainty since C sat directly influences the magnitude of SP signals. The accuracy of other electrical parameters is lower than that of C sat (and hydraulic parameters), and the associated uncertainty can be one order of magnitude larger.

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Laboratory and Field Testing of Unsaturated Soils

Cited by 17 publications

References 280 publications

Using water treatment sludge to Improve Geotechnical Engineering Properties of Soils: A Review

Using water treatment sludge to Improve Geotechnical Engineering Properties of Soils: A Review

Geotechnical Properties of Problematic Soils Emphasis on Collapsible Cases

Coupled inversion of hydraulic and self‐potential data from transient outflow experiments to estimate soil petrophysical properties

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