Volume Changes in Undisturbed Clay Profiles in Western Canada

Hamilton, J. J.

doi:10.1139/t63-004

Cited by 14 publications

(2 citation statements)

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“…Swelling and shrinkage in the expansive Regina clay depend on the following distinct but interrelated parameters: (i) soil geology and geotechnical properties [13,14]; (ii) ground cover and vegetation type [15,16]; (iii) seasonal weather and environmental conditions [17,18]; and (iv) hydrologic conditions and depth below surface [19,20]. Based on these factors, a simplified approach was adopted for the selection of parameters affecting volume changes in the expansive clay.…”

Section: Modeling Of Bayesian Belief Network 21 Parameter Selectionmentioning

confidence: 99%

Assessment of Infrastructure Reliability in Expansive Clays Using Bayesian Belief Network

Kabir

Azam

2022

CivilEng

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Civil infrastructure supported by expansive clays is severely affected by extensive volumetric deformations. The reliability prediction of such facilities is quite challenging because of the complex interactions between several contributing factors, such as a scarcity of data, a lack of analytical equations, correlations between quantitative and qualitative information, and data integration. The main contribution of this research is the development of a modeling approach based on the Bayesian belief network. The modeling results highlight that facility age is the most critical parameter (23% variance), followed by facility type (1.37% variance), for all the investigated types of infrastructure, namely road embankments, buried pipelines, and residential housing. Likewise, the results of sensitivity analysis and extreme scenario analysis indicate that the new method is capable of predicting infrastructure reliability and the assessments were found to be in agreement with expected field behavior. The proposed model is useful in decision making related to civil infrastructure management in expansive clays.

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Section: Modeling Of Bayesian Belief Network 21 Parameter Selectionmentioning

confidence: 99%

Assessment of Infrastructure Reliability in Expansive Clays Using Bayesian Belief Network

Kabir

Azam

2022

CivilEng

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“…Jones and Holtz, (1973) showed the volume changes in clay, because of variations in moisture content, occur within about 30 ft of the ground surface. However, most changes that cause engineering problems take place at depths of less than 10 ft (Hamilton, 1963;Gromko, 1974). My-W is mostly saturated throughout the year since water logging capability and availability of water; the shrink-swell behaviour is very limited.…”

Section: Swell Potential Of Soilsmentioning

confidence: 99%

Prior Assessment of Variability in the Geotechnical Properties of Soils for Efficient Infrastructure Management

Dharamapriya

Jayasena

2021

Preprint

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Advance assessments of variations in geotechnical properties of soils are invaluable in making a crucial judgment of geotechnical engineering projects. It could drive to reduce the number of field and laboratory tests so that efficient management design and construction of infrastructure project outputs can be achieved. In this study, we aim at assessing the geotechnical properties of residual, alluvial, marshy, coastal, and compacted soils within the wet and the dry zones of Sri Lanka. Plastic limit (PL), liquid limit (LL), shrinkage limit (SL), plasticity index (PI), liquidity index (LI), compression index (Cc), swell potential (SP), activity, natural moisture content (NMC) and SPT-N values were either extracted from reports or deduced from formulas and graphs. Wet zone marshy soils (My_W) show highest statistical means for PL (~23%), LL (~40%), PI (~16 %), SL (~20 %), LI (~ 1%), Cc (~ 0.200) and NMC (~ 35%), indicating poor engineering properties. Wet zone residual soils (Re_W) represent a wide range of direct correlations to the parent material. CH, OH, CL and SM soil groups for some My_W show high expansive, while, CL, Pt/CL, OL, SC, SM in My_W, CL, and SC in Re_W and CL in Dry Zone Alluvial Soils (Al_D) display medium expansive. The higher SPT-N values were recorded in the upper 6.00m and between 12.00-16.00m for the shell of earth dams (SED_D) in the dry zone, in contrast to Al_D soils representing higher N values for 6.00-12.00m. Except for marshy soils, no vertical variation for plasticity was observed in others. Since high to medium swell potential in the unsaturated zone is encountered within the upper 1.50m, attention should pay to the My_W. LL and PI of My_W were strongly correlated (R2 = 0.83) so that an equation PI% = -1.91 + (0.46*LL%) could be used to calculate PI. The results provide baseline geotechnical property variations for the five soils in Sri Lanka so that during planning, best-calculated assessment could be achieved which could minimize time and cost for crucial geotechnical investigations.

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2012

Unsaturated Soil Mechanics in Engineering Practice

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Volume Changes in Undisturbed Clay Profiles in Western Canada

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Cited by 14 publications

References 1 publication

Assessment of Infrastructure Reliability in Expansive Clays Using Bayesian Belief Network

Assessment of Infrastructure Reliability in Expansive Clays Using Bayesian Belief Network

Prior Assessment of Variability in the Geotechnical Properties of Soils for Efficient Infrastructure Management

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