Shield tunnel segment design parameter optimization method

Abstract

Note: for the problem of characters, expressions of the same meaning need to adopt the same character, and expressions of different meanings need to adopt different characters; and for the problem ofnames of terms, for expression of the same meaning, the names of terms should be unified. The invention discloses a shield tunnel segment design parameter optimization method, and relates to the technical field of engineering construction. The shield tunnel segment design parameter optimization method comprises the following steps: performing parameter value combination by utilizing an orthogonaltest table and segment design parameters, and forming a plurality of working condition design schemes; calculating to obtain the minimum safety coefficient Kmin of the shield tunnel segment under eachworking condition design scheme; training a BP neural network according to the segment design parameters under the working condition design scheme and the corresponding Kmin; according to the segmentdesign parameters, the Kmin and the mapping relationship between the segment design parameters and the Kmin, solving an optimal solution of the segment design parameters by adopting a genetic algorithm; and adjusting the optimal solution of the segment design parameters. The shield tunnel segment design parameter optimization method is high in operability and reliability for the actual shield tunnel segment design, overcomes the defect that an existing shield tunnel segment design is optimized through experience, can optimize multiple design parameter variables at the same time within a larger range, and can guarantee that design parameter values in a design scheme are optimal, so as to guarantee safety construction of the design scheme.

Description

technical field [0001] The invention relates to the technical field of engineering construction, in particular to a method for optimizing design parameters of a shield tunnel segment. Background technique [0002] In the design of shield tunnel segments, there are many factors that affect the performance of segments, mainly reflected in segment thickness, segment width, adjoining block angle, capping block angle and capping block assembly point. The existing shield tunnel segment design method is based on engineering experience and actual engineering requirements, and is compared and selected among several design schemes. According to the modeling and calculation of each design scheme, the internal force of the segment is obtained, and the design scheme with better structural stress is selected. The disadvantage of this method is: due to the large number of design parameters and the limitation of human calculation, it is difficult to ensure the optimal value of the paramete...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is: due to the large number of design parameters and the limitation of human calculation, it is difficult to ensure the optimal value of the parameters in the design scheme, and it cannot better ensure the safe construction of the design scheme.

Images