Evaluation of soil collapse potential in regional scale |
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Authors: | Mehdi Momeni Ali Shafiee Mojtaba Heidari Mohammad Kazem Jafari Mohammad Reza Mahdavifar |
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Institution: | 1. Department of Civil Engineering, Kerman Branch, Islamic Azad University, Kerman, Iran 2. Geotechnical Engineering Research Center, International Institute of Earthquake Engineering and Seismology, No. 26, W. Arghavan St., N. Dibaji St., Tehran, Iran 3. Geology Department, Faculty of Science, Bu Ali Sina University, Hamadan, Iran
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Abstract: | Collapsible soils have considerable strength and stiffness in their dry natural state but settle dramatically when they become wet. This paper documents a low-cost, qualitative evaluation scheme using fuzzy set analysis to determine site collapsibility based on subjective knowledge of the geological, geotechnical, and environmental conditions and their uncertainty. For each category, factors or subcategories were defined in a decision tree based on relevant literature. Each category and subcategory was then weighted or rated using linguistic terms developed from expert assessment. The linguistic data or information obtained from the assessments was represented and processed using fuzzy sets. To calibrate the criteria, 87 collapse potential tests were performed on undisturbed soil samples gathered from 27 different locations throughout Iran, leading to the definition of a standard collapse potential fuzzy set. Finally, on the basis of the established criteria, a collapse potential map was prepared for a suburban area in the western part of the city of Kerman, Iran. |
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