武汉地铁站深基坑支护结构参数优化系统研究

Study on the Parameter Optimization System for Supporting Structure of Deep Station Excavation in Wuhan

以武汉地铁站二号线一期深基坑工程为研究背景,针对武汉地铁站深基坑岩土条件特殊、地铁站沿线工程条件复杂等问题,分析深基坑支护结构设计和优化设计的基本原理,建立支护结构计算分析求解模型,应用有限元法、非线性规划方法、遗传算法、以及MATLAB语言编程等研究手段,对地铁深基坑的支护结构参数进行优化,建立科学、合理的优化模型和优化软件,并据其选择相关支护结构参数,为地铁深基坑支护结构设计提供合理的依据。以武汉市地铁积玉桥站基坑工程中的应用为例,分析结果表明优化软件的计算结果可靠准确。研究成果对武汉市地铁站工程具有重要的经济意义及指导意义。

The deep excavation work of the first-phase project of Wuhan No.2 subway line is taken as the background of the study.Aiming at the issue of Wuhan station deep foundation pit with its specific geotechnical conditions and the complicated engineering conditions along Wuhan station line,the basic principle of design and optimization design for the deep foundation pit bracing structure is analyzed.The nonlinear programming method,the genetic algorithm,and MATLAB for deep excavation of subway supporting structure parameter optimization,the scientific and reasonable optimization model and optimization software are established by the finite element method.The software capable to optimize the relevant supporting structure parameters provides the reasonable basis for deep excavation of metro supporting structure design.Taking Jiyu Bridge Station as an example,the analysis result indicates that the optimization software is accurate and reliable.The research results have an important economic and guidance significance for subway station engineering in Wuhan.