Civil Engineering Association

Plate-Load Tests of Collapsible Soils

Plate-load tests are considered the most reliable and informative source of soil-deformation properties required for a successful foundation design. Plate-load test results are influenced by many factors: plate or experimental foundation dimensions/configuration, soil conditions, testing technique, etc. Numerous experiments demonstrated that there is a linear relationship between settlements of plates or foundations and square roots of their areas varying between approximately 0.06 and 25.0 m². Two major soil parameters (deformation modulus and proportionality limit) can be determined utilizing a load-settlement curve developed from field tests. Collapsible soil behavior under foundations depends on the degree of soil-saturation values. This paper presents the results of plate-load tests performed on collapsible soils under in situ and wetted conditions. The results of laboratory and field tests are compared.

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