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Abstract Based on fuzzy mathematics theory，a risk analysis model was established for the influence of deep excavation construction on surrounding environment. By using this model，reasonable risk loss evaluation index，risk grade division and risk loss formula were proposed through analytical and quantitative analysis of a concrete project example. After studying the evaluation index and relative weight of building damage，pavement damage and underground pipeline damage around the deep excavation，risk analysis and assessment of the influence on surrounding environment caused by excavation of foundation pit were achieved. The analysis and assessment is conducted through the membership degree which is given from the membership function structured for each evaluation factor. Then through the comprehensive risk evaluation，risk level can be finally determined. This result based on project example can be used as a reference for engineering decision-making.
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Received: 20 August 2012
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2013, Vol. 32 
