中文摘要：

地铁隧道围岩的非线性、非均质、不连续性等特点,难以给出准确的围岩力学参数.引入智能优化算法——差异进化算法（Differential Evolution,DE）到反分析方法中,该算法在搜索成功率和计算效率上有很大的优势,对初始值无要求、受控变量较少、收敛速度快、自适应性好等优点;最近点投射算法（Closest Point Projection Method,CPPM）是本构积分算法的一种,可避免预测应力漂移屈服面的现象,具有精确性和稳定性等特点,迭代计算中使用Newton-Raphson法可获得近似平方的收敛速度.基于Drucker-Prager模型的最近点投射算法和差异进化算法原理,综合2个算法的优势,从优化算法的选择和调用的正算程序2个方面考虑,建立了弹塑性智能位移反分析DE-CPPM方法.采用C＋＋语言自主开发了全套智能位移反分析程序,并将其应用于在建大连地铁1号线试验线路海事大学段隧道工程.结果表明了该方法的可行性和正确性,及程序的高精度性和实用性,为在建大连地铁隧道后期施工提供了参考和帮助.

英文摘要：

The mechanics parameters of surrounding rock are difficult to be given accurately, due to the charac- teristics of nonlinearity, heterogeneity and discontinuity etc. of subway tunnel surrounding rock. The intelli- gent optimization algorithm-differential evolution algorithm（DE） were introduced into the back analysis meth- od. The intelligent optimization algorithm-differential evolution algorithm are of highly superior computational efficiency and success rate of searches and have the advantages of no requirements for the initial value, less con- trolled variables, faster convergence rate and good adaptation etc. The closest point projection method（CPPM） is a kind of constitutive integrating algorithm characterized by good accuracy and stability and by being able to avoid the phenomenon of predicting the yield surfaces of stress drift and the Newton-Raphson iteration method can be used to obtain the approximate square convergence speed. Combining the advantages of the closest point projection method based on the Drucker-Prager model and the intelligent optimization algorithm-differential e- volution algorithm and considering the two aspects of selecting the optimization algorithm and calling the calcu- lation program, the DE-CPPM elastic-plastic intelligent back analysis method was set up. The full set of intel- ligent back analysis program was developed independently with language C＋ ＋ and was applied in the under- construction tunnel project in the section of the Dalian Maritime University of the test line of Dalian Subway Line 1. The results show the feasibility and correctness of the method and the high accuracy and practicality of the program, thus providing reference and help for later-stage construction of Dalian subway tunnels.