Indirect Estimation of Swelling Pressure of Clayey Subgrade Under Pavement Structures

Djellali, Adel; Houam, Abdelkader; Saghafi, Behrooz

doi:10.1007/s13369-017-2546-7

Cited by 8 publications

(2 citation statements)

References 21 publications

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“…Though, the proportionality of coefficients of determination values can vary based on the percentages of clay minerals. The results presented herein agree with the result published by Djellali, et al [34] which stated that volumetric and linear shrinkage, plasticity index, and liquid limit significantly influence the swelling pressure, but depend on the proportionality of the percentage of clay content.…”

Section: Swelling Pressure -Pi Relationshipsupporting

confidence: 92%

Swelling Pressure Prediction of Compacted Unsaturated Expansive Soils

Ikechukwu

Hassan

2022

JERA

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Generally, expansive soils undergoes significant volumetric deformation, which causes structural damages to existing infrastructures. Damages due to expansive activities are noticeable in pavements, buildings, earth dams, retaining walls etc. To estimate swelling stress, accurate assessment of soil absorption of water over time, with respect to soil volumetric change is required. However, the time frame requires for completion of swelling cycle is relatively long. With this in view, several attempts with great success have been made by researchers to predict swelling pressure of expansive soils using soil mechanics index properties. In this study, the interrelation between unsaturated soil mechanics property i.e. Matric suction () and geotechnical soil indexes were utilized to develop three predictive multi-regression equation for swelling stress. Series of Atterberg limit tests, matric suction tests, free swell index (FSI) tests and zero swelling tests (ZST) were performed to obtain the dependent and independent variables for the multi-regression analysis. Based on the experimental results, empirical relationships were developed to determine swelling stress as a function of matric suction, gravimetric moisture content (GMC), FSI, dry density and plasticity index using mathematical software package (NCSS11). The developed predictive multi-regression models were used to estimate the experimental swelling stress (. The scattered plot showed good agreement between the measured and predicted data, with coefficient of determination (R2) and mean square error (MSE) of 0.9443, 0.9793, 0.9310 and 0.0051%, 0.0021% and 0.0067% for models 1, 2 and 3 respectively.

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Section: Swelling Pressure -Pi Relationshipsupporting

confidence: 92%

Swelling Pressure Prediction of Compacted Unsaturated Expansive Soils

Ikechukwu

Hassan

2022

JERA

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“…Their empirical sector chart was supplemented in 1981 with areas of the selected clay minerals occurrence [19]. Many empirical graphs showing the expected level of soil swelling susceptibility can be found in the literature [20][21][22][23]. In general, however, none is universally valid for all soils or locations.…”

Section: Prediction Of Swelling Processesmentioning

confidence: 99%

Problems with reinforced concrete industrial floors with regard to subsoil swelling

Pruška,

Šedivý,

Anderle

2024

Acta Polytech

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Most of the problems associated with open cracks in reinforced concrete industrial floors do not arise from technological indiscipline in the execution or exceeding the permitted floor load, but from the geotechnical profile beneath the floor. In the presence of swelling soil in the subsoil, the floors can then be shifted upwards by centimeters and create open cracks. This article describes regression relationships for the prediction of swelling pressure and deformation of reinforced concrete industrial floors based on indirect measurements. These relationships were obtained by evaluating a large database of measurements carried out by the company GeoTec-GS and the Czech Technical University in Prague using neural networks, multiple correlation, regression analysis, and sensitivity analysis. The article also presents the actual classification of the risk of surface damage of reinforced concrete floors due to swelling of the subsoil and an example of its application is given.

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