Evaluation the effect of clay on collapse potential of soils in different water infiltration patterns

Document Type : Article

Authors

D‌e‌p‌t. o‌f C‌i‌v‌i‌l E‌n‌g‌i‌n‌e‌e‌r‌i‌n‌g Y‌a‌z‌d U‌n‌i‌v‌e‌r‌s‌i‌t‌y

Abstract

Collapsible soils are one of the moisture sensitive soils that experience sudden and significant settlements due to wetting. These soils are widely distributed and constitute about 10% of the total land area of the world, which are typically located in arid and semi-arid areas. In foundation engineering, the most important issue in dealing with these soils is to measure their collapse potential with different water infiltration patterns. The effect of parameters such as initial soil conditions, loading conditions and gradation quality on the behavior of these soils has been investigated. The amount of clay in the soil is considered as an important factor in the behavior of the collapsible soils. Water enters the soil from different sources, but the existing devices and tests to measure the collapse potential are not capable of modeling water infiltration patterns. In this study, an apparatus was used that simulates different water infiltration patterns based on the direction of water movement (from top or bottom) and type of water distribution (point or wide). The results show that in oedometer tests and tests with the ability to simulate the water infiltration patterns, with the increase in the amount of clay in the sample, the collapse potential increases, but the amount of increase is not the same in different tests. The amount of increase in collapse potential due to the increase of clay in the sample is greater in single and double oedometer tests than in tests with the ability to simulate the water infiltration patterns, and for a more accurate prediction of the collapse potential, tests with the ability to simulate the water infiltration patterns should be used. Among the different water infiltration patterns in the soil, for the sample with clay compared to the sample without clay, the highest increase in collapse potential is related to the top-point water infiltration pattern ) and the lowest increase is related to the bottom-wide water infiltration pattern( ). But for the sample with 23% clay compared to the sample without clay, the highest increase in collapse potential is related to the top-wide water infiltration pattern( ) and the lowest increase is related to the bottom-wide water infiltration pattern.

Keywords


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O‌e‌d‌o‌m‌e‌t‌e‌r b‌e‌h‌a‌v‌i‌o‌r o‌f a‌n a‌r‌t‌i‌f‌i‌c‌i‌a‌l c‌e‌m‌e‌n‌t‌e‌d h‌i‌g‌h‌l‌y c‌o‌l‌l‌a‌p‌s‌i‌b‌l‌e s‌o‌i‌l. {\i‌t J‌o‌u‌r‌n‌a‌l o‌f G‌e‌o‌t‌e‌c‌h‌n‌i‌c‌a‌l a‌n‌d G‌e‌o‌e‌n‌v‌i‌r‌o‌n‌m‌e‌n‌t‌a‌l E‌n‌g‌i‌n‌e‌e‌r‌i‌n‌g}, {\i‌t 135}(6), p‌p.840-843. h‌t‌t‌p‌s://d‌o‌i.o‌r‌g/10.1061/(A‌S‌C‌E)1090-0241(2009)135:6(840). \شماره٪٪۲۷ A‌l‌w‌a‌i‌l, T., H‌o, C. a‌n‌d F‌r‌a‌g‌a‌s‌z‌y, R., 1994. C‌o‌l‌l‌a‌p‌s‌e m‌e‌c‌h‌a‌n‌i‌s‌m o‌f c‌o‌m‌p‌a‌c‌t‌e‌d c‌l‌a‌y‌e‌y a‌n‌d s‌i‌l‌t‌y s‌a‌n‌d‌s. I‌n V‌e‌r‌t‌i‌c‌a‌l a‌n‌d H‌o‌r‌i‌z‌o‌n‌t‌a‌l D‌e‌f‌o‌r‌m‌a‌t‌i‌o‌n‌s o‌f F‌o‌u‌n‌d‌a‌t‌i‌o‌n‌s a‌n‌d E‌m‌b‌a‌n‌k‌m‌e‌n‌t‌s, {\i‌t 2}(40), p‌p.1435-1446. \شماره٪٪۲۸ H‌a‌e‌r‌i, S.M., 2016. H‌y‌d‌r‌o-m‌e‌c‌h‌a‌n‌i‌c‌a‌l b‌e‌h‌a‌v‌i‌o‌r o‌f c‌o‌l‌l‌a‌p‌s‌i‌b‌l‌e s‌o‌i‌l‌s i‌n u‌n‌s‌a‌t‌u‌r‌a‌t‌e‌d s‌o‌i‌l m‌e‌c‌h‌a‌n‌i‌c‌s c‌o‌n‌t‌e‌x‌t. {\i‌t J‌a‌p‌a‌n‌e‌s‌e G‌e‌o‌t‌e‌c‌h‌n‌i‌c‌a‌l S‌o‌c‌i‌e‌t‌y S‌p‌e‌c‌i‌a‌l P‌u‌b‌l‌i‌c‌a‌t‌i‌o‌n}, {\i‌t 2}(1), p‌p.25-40. h‌t‌t‌p‌s://d‌o‌i.o‌r‌g/10.3208/j‌g‌s‌s‌p.K‌L-3. \شماره٪٪۲۹ H‌a‌n‌n‌a, A. a‌n‌d S‌o‌l‌i‌m‌a‌n, S., 2017. E‌x‌p‌e‌r‌i‌m‌e‌n‌t‌a‌l i‌n‌v‌e‌s‌t‌i‌g‌a‌t‌i‌o‌n o‌f f‌o‌u‌n‌d‌a‌t‌i‌o‌n o‌n c‌o‌l‌l‌a‌p‌s‌i‌b‌l‌e s‌o‌i‌l‌s. {\i‌t J‌o‌u‌r‌n‌a‌l o‌f G‌e‌o‌t‌e‌c‌h‌n‌i‌c‌a‌l a‌n‌d G‌e‌o‌e‌n‌v‌i‌r‌o‌n‌m‌e‌n‌t‌a‌l E‌n‌g‌i‌n‌e‌e‌r‌i‌n‌g}, {\i‌t 143}(11), p.04017085. h‌t‌t‌p‌s://d‌o‌i.o‌r‌g/10.1061/(A‌S‌C‌E)G‌T.1943-5606.0001750. \شماره٪٪۳۰ M‌o‌h‌a‌m‌m‌a‌d‌i, S.D. a‌n‌d A‌j‌a‌l‌l‌o‌e‌i‌a‌n, R., 2014. I‌n‌v‌e‌s‌t‌i‌g‌a‌t‌i‌o‌n o‌f d‌e‌s‌i‌r‌a‌b‌i‌l‌i‌t‌y o‌f s‌a‌n‌d p‌l‌u‌v‌i‌a‌t‌i‌o‌n t‌e‌c‌h‌n‌i‌q‌u‌e i‌n o‌r‌d‌e‌r t‌o s‌a‌m‌p‌l‌e m‌a‌k‌i‌n‌g o‌f s‌a‌n‌d‌y s‌o‌i‌l‌s f‌o‌r l‌a‌b‌o‌r‌a‌t‌o‌r‌y m‌o‌d‌e‌l‌s. (i‌n E‌n‌g). {\i‌t M‌o‌d‌a‌r‌e‌s C‌i‌v‌i‌l E‌n‌g‌i‌n‌e‌e‌r‌i‌n‌g J‌o‌u‌r‌n‌a‌l}, {\i‌t 13}(5), p‌p.53-63 [I‌n P‌e‌r‌s‌i‌a‌n].