Dynamic risk assessment and management method for foundation pit engineering

Abstract

The invention relates to a method for dynamic risk assessment and management of foundation pit engineering, comprising the following steps: 1) using Delphi method to identify risk factors of foundation pit engineering and classifying them; 2) according to the risk occurrence probability, risk loss and risk controllability of foundation pit engineering 3) Using the improved hierarchical method based on triangular fuzzy numbers and the fuzzy comprehensive evaluation method to evaluate the risk of foundation pit engineering; 4) According to the risk evaluation results, put forward risk response decisions; 5) The risk of foundation pit engineering is tracked and monitored. If there is a new risk source, return to step 1), and carry out risk identification, risk estimation, risk evaluation, risk decision-making and risk tracking again; if there is no new risk source, the risk management process ends. The invention overcomes the disadvantage that the static risk assessment does not consider that the risk factors change with the development of the project construction, and the risk assessment index and classification standard are more systematic and comprehensive, and the risk assessment model is more accurate and reasonable.

Description

Technical field [0001] The invention relates to a risk assessment and management method for civil engineering construction, in particular to a dynamic risk assessment and management method for foundation pit engineering. Background technique [0002] With the large-scale development and utilization of urban underground space in our country, the number of foundation pit projects is increasing, the construction conditions and environmental conditions of foundation pit projects are becoming more and more complex, and the risks of construction are increasing. Foundation pit engineering accidents occur frequently. According to relevant literature statistics, the success rate of foundation pit engineering in some areas is only 1 / 3, and the remaining 2 / 3 of the foundation pits have more or less problems of one kind or another. Once a risk accident occurs during the construction of a deep foundation pit project, it will not only delay the construction period and cause huge economic losse...

AI Technical Summary

Problems solved by technology

However, in actual engineering, in addition to these two evaluation factors, there are many other factors (such as: the predictability of risk, the controllability of risk, the transferability of risk loss, etc.) that will also affect or even determine the risk of the project. It is incomplete and inaccurate to use only these two indicators to measure risk

On the other hand, in the calculation of risk assessment weights, the commonly used AHP analysis cannot fully reflect the various ambiguities and uncertainties existing in risk scores.

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