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Back Analysis of Surrounding Rock Mechanical Parameters of Underground Caverns Based on Genetic Algorithm
(1 College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098; 2 SHUYU Water Conservancy and Hydropower Engineering Design Co. Ltd., Chengdu 610000; 3 Shanghai Investigation, Design & Research Institute Co. Ltd., Shanghai 200434 )
Abstract Surrounding rocks are the main bearing structure of underground caverns, and mechanical parameters used in design and analysis affect the result reliability directly. Based on the monitoring data of surrounding rocks of a water diversion tunnel and genetic algorithm, secondary development of software ABAQUS was conducted, related genetic algorithm was programmed to back analyze the mechanical parameters of surrounding rocks of underground caverns, then a comparison between the calculated parameters and the designed parameters was taken to discuss the rationality of the designed parameters. The results show that the inversion values are larger than the designed ones,and the displacements calculated by the inversion parameters are smaller than that of the original parameter values,showing that the parameters adopted in design are safe. The analysis results prove that the method proposed in this paper is available for parameter analysis in similar projects.
Abstract：
Surrounding rocks are the main bearing structure of underground caverns, and mechanical parameters used in design and analysis affect the result reliability directly. Based on the monitoring data of surrounding rocks of a water diversion tunnel and genetic algorithm, secondary development of software ABAQUS was conducted, related genetic algorithm was programmed to back analyze the mechanical parameters of surrounding rocks of underground caverns, then a comparison between the calculated parameters and the designed parameters was taken to discuss the rationality of the designed parameters. The results show that the inversion values are larger than the designed ones,and the displacements calculated by the inversion parameters are smaller than that of the original parameter values,showing that the parameters adopted in design are safe. The analysis results prove that the method proposed in this paper is available for parameter analysis in similar projects.
.Back Analysis of Surrounding Rock Mechanical Parameters of Underground Caverns Based on Genetic Algorithm[J] MODERN TUNNELLING TECHNOLOGY, 2018,V55(6): 53-58
2018, Vol. 55 