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

Document Type : Research Article

Authors

1 department of civil engineering, yazd university

2 department of civil engineering, Yazd university

Abstract

Collapsible soils have good stability in dry state, but it experiences significant settlements due to wetting. Many characteristics can affect the collapse settlement. The amount of wetting pressure is one of the most important parameters affecting the collapsible soil. Water can enter the collapsible soil from various sources such as floods, rainfall, irrigation, etc. But in the tests used to investigate the behavior of the collapsible soils, the influence of these sources cannot be investigated. An apparatus capable of simulating different patterns of water infiltration in the soil was built and using three wetting pressure of 100, 200, and 300 kPa, the effect of surcharge in each pattern of water infiltration was investigated separately. The results show that for collapsible soil is used, in all three surcharges, the collapse potential of the oedometer test is different from the water infiltration tests. The biggest difference is related to the surcharge of 300 kPa that the maximum difference between the oedometer and water infiltration tests is 16%. When the water enters as top-point pattern, the highest collapse potential is created among the different patterns. The collapse potential decreases with the increase of the surcharge, but the amount of changes is different for each pattern. For example, with the increase of surcharge from 100 to 200 kPa, the greatest reduction of the collapse potential with a value of 27.2% is created in the bottom-point pattern.

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Amirkabir Journal of Civil Engineering

Articles in Press, Accepted Manuscript
Available Online from 09 August 2024

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