铁道科学与工程学报2025，Vol.22Issue(2)：807-816,10.DOI:10.19713/j.cnki.43-1423/u.T20240693
基于组合模型的盾构管片沟槽断面尺寸优化研究
Research on optimization of shield segment groove section size based on combined agent model
摘要
Abstract
The current practice of optimizing groove sections based on engineering experience and analog methods often leads to low design efficiency due to extensive numerical simulations and indoor experiments.Taking the Ⅲ-type groove section of the Nanjing Heyan Road Tunnel Project as an example,this study comprehensively considered the influence of groove section slope,depth,and width on the waterproofing performance of sealing gaskets.By combining numerical simulation and agent model,an efficient groove section optimization scheme was designed and implemented.This scheme employed the optimal Latin hypercube experimental design method for the design of the experimental plan.A three-dimensional computational model was established using finite element software to simulate the assembly compression process of segment joint sealing gaskets,obtaining the effective leakage rates between gaskets under different experimental parameters.A combination forecasting model based on Kriging,response surface,and support vector machine regression models was proposed to predict the effective leakage rates between gaskets.Subsequently,by utilizing the combination model,with groove section slope,depth,and width as optimization variables and the effective leakage rate between gaskets as the objective variable,a genetic algorithm was employed to obtain the optimal combination parameters of slope,depth,and width.The research results indicate that the use of combinational surrogate models achieves rapid and accurate calculation of leakage rates between sealing gaskets,saving computational time and significantly improving optimization efficiency.The use of optimized groove sections has significantly improved the waterproofing performance at the joints of the segments compared to pre-optimization,verifying the effectiveness of the proposed method.In comparison to single prediction models,the combination forecasting model yields more accurate results with lower errors and better prediction performance.The proposed models and methods can serve as a reference and guide for gasket and groove section optimization design.关键词
盾构隧道/接缝防水/组合预测/有效泄漏率预测/沟槽优化Key words
shield tunnel/joint waterproof/combination forecast/effective leakage rate forecast/groove optimization分类
交通运输引用本文复制引用
李怡函,肖明清,薛光桥,张超勇..基于组合模型的盾构管片沟槽断面尺寸优化研究[J].铁道科学与工程学报,2025,22(2):807-816,10.基金项目
国家自然科学基金资助项目(52178398) （52178398）
