Model for Optimal Selection of Soft Soil Treatment Schemes on Considering Uncertainty of Evaluating Indexes

ZHANG Shi-li; ZHANG Yi-fei; YUAN Hang-xin; YING Yue-long

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Journal of Railway Engineering Society ›› 2010, Vol. 27 ›› Issue (3) : 19-23.

Model for Optimal Selection of Soft Soil Treatment Schemes on Considering Uncertainty of Evaluating Indexes

ZHANG Shi-li1；ZHANG Yi-fei2；YUAN Hang-xin2 YING Yue-long2

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Abstract

Research purposes：There are lots of fuzzy and uncertain factors involved in optimal selection of soft soil treatment scheme, such as geological conditions, construction conditions, environmental conditions and engineering cost. In order to get the most practical soft soil treatment scheme, it is necessary to establish a new model that can take fuzzy and uncertain factors into consideration for treating the soft soil.

Research conclusions：The Interval numbers attribute was used to evaluate the fuzziness and uncertainty of indexes. After standardizing decision-making matrix and separating it into mid-point matrix and radius matrix, linearly weighted aggregation and error transfer formula were employed to calculate the interval numbers of comprehensive evaluation value of all optional schemes. The possibility degree formula and ranking formula were used to rank and select optional schemes finally. The analysis of the case showed using this model could reduce the lost information for evaluation and improve the reliability of evaluation result. This model provides the other way for selection of soft soil treatment scheme.

Key words

soft soil treatment / optimal selection / interval numbers / error analysis / possibility degree

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ZHANG Shi-li, ZHANG Yi-fei, YUAN Hang-xin, et al. Model for Optimal Selection of Soft Soil Treatment Schemes on Considering Uncertainty of Evaluating Indexes[J]. Journal of Railway Engineering Society, 2010, 27(3): 19-23

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