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Inversion Analysis on the Joint Stiffness of Shield Tunnel Segments Based on Genetic Algorithm
(1. China Railway Siyuan Survey and Design Group Co., Ltd., Wuhan 430063; 2. National-Local Joint Engineering Research Center of Underwater Tunnelling Technology, Wuhan 430063; 3. Shanghai Tongyan Civil Engineering Technology Co., Ltd., Shanghai 200092;4. Shanghai Engineering Research Center of Underground Infrastructure Detection and Maintenance Equipment, Shanghai 200092)
Abstract The beam-spring model is widely used in the calculation of segment lining structure. As for the joint stiff? ness there are mainly the model test method and the empirical method, of which the former is time-consuming and costly, while the latter is inevitably subjective to a certain extent. In view of this, this paper develops an inversion analysis program for the displacement of shield tunnel segment structure based on genetic algorithm by using C++ programming language. By inverse calculation examples of elastic modulus, the error between the inversion value and the theoretical value is 1.4%, verifying the feasibility of the algorithm and program. Using the program, the inversed joint stiffness values are compared with the segment joint stiffness values in actual design cases, the inversion calculation results show that the inversion error of the rotational stiffness of the circumferential segment joint is 2.6% under positive bending moment, and 4.3% under the condition of negative bending moment.
Abstract：
The beam-spring model is widely used in the calculation of segment lining structure. As for the joint stiff? ness there are mainly the model test method and the empirical method, of which the former is time-consuming and costly, while the latter is inevitably subjective to a certain extent. In view of this, this paper develops an inversion analysis program for the displacement of shield tunnel segment structure based on genetic algorithm by using C++ programming language. By inverse calculation examples of elastic modulus, the error between the inversion value and the theoretical value is 1.4%, verifying the feasibility of the algorithm and program. Using the program, the inversed joint stiffness values are compared with the segment joint stiffness values in actual design cases, the inversion calculation results show that the inversion error of the rotational stiffness of the circumferential segment joint is 2.6% under positive bending moment, and 4.3% under the condition of negative bending moment.
XUE Guangqiao1,
2 CHENG Yan3,
4 LIU Xiaodi3 etc
.Inversion Analysis on the Joint Stiffness of Shield Tunnel Segments Based on Genetic Algorithm[J] MODERN TUNNELLING TECHNOLOGY, 2022,V59(2): 78-85
2022, Vol. 59 