CONSOLIDATION BEHAVIOR OF COLLAPSIBLE CLAYEY SOILS IN SATURATED AND UNSATURATED CONDITIONS

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BAGHERIE A.R.; FARSIJANI A.

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Journal: Sharif Journal of Civil Engineering Year:2016 | Volume:32-2 | Issue:1.1 Page(s): 43-54

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Title

CONSOLIDATION BEHAVIOR OF COLLAPSIBLE CLAYEY SOILS IN SATURATED AND UNSATURATED CONDITIONS

Author(s)

BAGHERIE A.R. | FARSIJANI A. | Issue Writer Certificate

Keywords

CONSOLIDATION BEHAVIORQ2

UNSATURATED SOILQ2

COLLAPSEQ2

FILTER PAPER METHODQ2

COLLAPSE POTENTIALQ2

Abstract

The effect of suction on CONSOLIDATION BEHAVIOR has a dominant role to play in the constitutive modeling of UNSATURATED SOILs, and, therefore, has received the researchers attention in this field. In this paper, the effect of the initial conditions of compacted specimens of a clayey soil on their CONSOLIDATION BEHAVIOR, under saturated and unsaturated states, is investigated. After determining the compaction curve of the soil, the samples were statically compacted at different initial suctions and void ratios (moisture content, dry densities). In order to investigate the volume change behavior of collapsible soils, the cylindrical samples were loaded to a definite stress in conventional oedometer apparatus. Then, while keeping the vertical stress constant, the volume changes of samples due to wetting were measured. After completion of the COLLAPSE settlements, the stepped loading of the samples was continued and the end of the primary consolidation line of the samples were attained. The saturated normal consolidation lines of samples with different initial water contents and dry densities are compared. It is shown that the normal consolidation line is almost unique and its position is not affected by the initial condition of the samples. This result suggests a simple method for predicting the COLLAPSE potential under different conditions. The method can be described as follows: The effective stress after saturation is calculated. The initial void ratio (before saturation) subtracted from the void ratio of the soil in a saturated normal consolidation line, corresponding to the effective vertical stress at saturation, would be the change of void ratio due to saturation. The COLLAPSE settlements could then be easily calculated. Since determination of the saturated normal consolidation line is a conventional and inexpensive procedure, the proposed method can be regarded as a versatile and inexpensive technique for forecasting the COLLAPSE potential.

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APA: Copy

BAGHERIE, A.R., & FARSIJANI, A.. (2016). CONSOLIDATION BEHAVIOR OF COLLAPSIBLE CLAYEY SOILS IN SATURATED AND UNSATURATED CONDITIONS. SHARIF: CIVIL ENINEERING, 32-2(1.1), 43-54. SID. https://sid.ir/paper/128220/en

Vancouver: Copy

BAGHERIE A.R., FARSIJANI A.. CONSOLIDATION BEHAVIOR OF COLLAPSIBLE CLAYEY SOILS IN SATURATED AND UNSATURATED CONDITIONS. SHARIF: CIVIL ENINEERING[Internet]. 2016;32-2(1.1):43-54. Available from: https://sid.ir/paper/128220/en

IEEE: Copy

A.R. BAGHERIE, and A. FARSIJANI, “CONSOLIDATION BEHAVIOR OF COLLAPSIBLE CLAYEY SOILS IN SATURATED AND UNSATURATED CONDITIONS,” SHARIF: CIVIL ENINEERING, vol. 32-2, no. 1.1, pp. 43–54, 2016, [Online]. Available: https://sid.ir/paper/128220/en

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