The invention discloses a deep foundation pit stability evaluation method based on an entropy weight-
analytic hierarchy process fuzzy comprehensive evaluation method, and belongs to the field of geotechnical
mechanics and
engineering. The method not only considers objectivity of index weight empowerment, but also considers risk
occurrence probability and accident damage loss degree, and mainly comprises the following steps: constructing an evaluation
index system; determining an evaluation index weight based on an
analytic hierarchy process; based on an
entropy weight method, correcting the weight of the evaluation index; determining an index comprehensive weight; dividing security levels; determining a
security level; and performing fuzzy comprehensive evaluation to obtain an evaluation
score. According to the method, the difference coefficient is provided, linear weighted combination is carried out on each index weight calculated by the
analytic hierarchy process and the
entropy weight method based on the coefficient, and the
stable state of the deep foundation pit is comprehensively and quantitatively evaluated by combining the refined deep foundation pit construction safety state grade evaluation table. According to the method, the problem that judgment of the matrix A is influenced by the expert experience level in an existing
analysis method is solved, the evaluation indexes can be objectively and accurately weighted, and the credibility of weight calculation is improved.