Underwater tunnel shield construction excavation face stability evaluation method, system and equipment

By combining the weighting method and the ideal point method, a stability evaluation system for the excavation surface in shield tunneling construction is constructed, which solves the problem of difficulty in maintaining the stability of the excavation surface during shield tunneling construction and achieves a scientific assessment and evaluation of the stability risks of the excavation surface. Prediction to ensure construction safety.

CN110378574AInactive Publication Date: 2019-10-25SHANDONG UNIV +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG UNIV
Filing Date
2019-07-01
Publication Date
2019-10-25
Estimated Expiration
Not applicable Β· inactive patent

AI Technical Summary

Technical Problem

When carrying out shield tunneling construction in soft soil areas, it is difficult to maintain the stability of the excavation surface, resulting in a high risk of safety accidents, especially under complex hydrogeological conditions where there is a lack of scientific risk prediction and prevention and control theories.

Method used

The combined weighting method and the ideal point method are used to construct an excavation surface stability evaluation system. By determining the weight of influencing factors and establishing stability levels, the stability grade membership degrees of different construction sections are calculated to provide scientific excavation surface stability. Evaluation methods and systems.

Benefits of technology

It realizes the scientific and effective assessment and prediction of the stability risks of the shield tunnel construction excavation surface, helps ensure construction safety, and provides reasonable risk classification and prediction methods.

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Abstract

The invention provides an underwater tunnel shield construction excavation face stability evaluation method, system and equipment, and the method comprises the steps: determining an excavation face stability evaluation index based on a shield construction excavation face instability mechanism; dividing the stability of the excavation surface into a plurality of grades, establishing each grade space, and determining the quantitative interval of each evaluation index in each grade; calculating a combined weight of each stability evaluation index by adopting a combined weighting method, and taking the combined weight as a judgment basis of the influence of the evaluation indexes on an evaluation result; and constructing an ideal point evaluation function by adopting an ideal point method so as to represent the membership degree of the to-be-evaluated object to each grade, calculating the grade membership degree of the to-be-evaluated section in each grade of the evaluation system, and determining the stability grade of the excavation surface in the construction process of the evaluation section.
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