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Risk Identification of Ground Settlement in Subway Shield Tunneling Construction Based on Factor Analysis
Pages: 209-216
Year: Issue:  2
Journal: Acta Scientiarum Naturalium Universitatis Neimongol

Keyword:  subway shield tunneling constructionground settlement riskWBS-RBSfactor analysis;
Abstract: On the basis of characteristic of subway shield tunneling construction,work breakdown structure is carried out in subway shield construction from three main stages of shield launching and shield break-through,shield regular excavation,and special node engineering to generate the WBS tree.Risk breakdown structure is carried out from four aspects of " Manpower-Management", "Machine", " Materials", " Method" and " Environment" to generate RBS tree.Basecd on WBS-RBS,38 risk factors are identified absolutely for questionnaire surveys and reliability tests.The results show that Cronbach’Alpha values of the samples are more than 0.7,and the total correlation values of the items in each level are more than 0.2.It reveals that the data of the questionnaire is reliable.Furthermore,the Kasier-Meyer-Olkin measure and Bartlett’s spherical test are carried out with factor analysis to checkout the correlation of indexes.The results show that the index has a strong correlation.By using SPSS18.0software with principal component analysis,16 key factors are extracted to reduce the number of indexes and the correlation.
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