Determination of the Critical Slip Surface of Slope Based on the Improved Quantum Genetic Algorithm and Random Forest

Intelligent optimization algorithms are widely used to determine the critical slip surface of slopes. However, the critical slip surface may not converge to a proper solution because of the nonconvex and discontinuous nature of the objective function. An intelligent optimization algorithm is develop...

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Bibliographic Details
Published in:KSCE journal of civil engineering 2022, 26(5), , pp.2126-2138
Main Authors: Xu, Zhaoxia, Zhou, Xiaoping
Format: Article
Language:English
Subjects:
Algorithms
Civil Engineering
Convergence
Engineering
Genetic algorithms
Geotechnical Engineering
Geotechnical Engineering & Applied Earth Sciences
Identification methods
Industrial Pollution Prevention
Mechanical analysis
Objective function
Optimization
Penalty function
Probability theory
Slip
Slope
Statistical analysis
토목공학
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Summary:Intelligent optimization algorithms are widely used to determine the critical slip surface of slopes. However, the critical slip surface may not converge to a proper solution because of the nonconvex and discontinuous nature of the objective function. An intelligent optimization algorithm is developed by combining the improved quantum genetic algorithm (QGA) and random forest (RF) regression method to identify the critical slip surface of the slope. A dynamic adjustment strategy is used to control the update and evolution direction of the population to obtain the global optimal solution, which not only ensures the convergence of the results but also effectively avoids premature convergence. The RF regression method is applied to estimate the fitness, which can help avoid the mechanical analysis of the slide body of the slope and increase the calculation efficiency. An external penalty function is used to penalize solutions that do not meet the constraints of the slip surface. This aspect reduces probability of such solutions appearing in the next generation, thereby ensuring that the identified critical slip surface has practical significance. The results obtained for four slope cases are in agreement with those of previous investigations, which demonstrates the accuracy and effectiveness of the proposed method. In addition, the results of the four slope cases show that the convergence speed is higher for a larger population.
ISSN:1226-7988
1976-3808
DOI:10.1007/s12205-022-1289-5